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With the rapid advancement in sensor technologies, triboelectric nanogenerators (TENGs) have emerged as a promising sustainable power source for intelligent electronics. Herein, fabricated a novel 3‐aminopropyltriethoxysilane (core) and 2,2‐bis(hydroxymethyl)butyric acid (monomer)‐based hyperbranched polyester by facile single‐step polycondensation technique generation 2 (Si‐HBP‐G2). Further, a new class of polyvinylidene fluoride (PVDF) and different weight percentages (0, 5, 10, 15, and 20 wt%) of Si‐HBP‐G2 hybrid fiber blends are prepared by traditional electrospinning technique. The as‐prepared Si‐HBP‐G2 and its blends are well characterized using SEM/EDS, FTIR, NMR, and XRD studies. The influence of Si‐HBP‐G2 content on triboelectric performance in terms of the open circuit potential (VOC) and short circuit current (ISC) is evaluated using aluminum (Al) as a counter electrode. Among them, 15 wt% of Si‐HBP‐G2/PVDF hybrid fiber mat (PG2‐15) exhibits superior electrical performance. Which is almost increased 5.9 times (22–130 V) of VOC and 4.9 times (0.71–3.5 µA) of ISC than PVDF fiber mate. These results reveal the significance of Si‐HBP‐G2 in the triboelectric performance. The optimized TENG device (PG2‐15/Al‐TENG) exhibits a peak power density of 0.2 Wm−2 at 100 MΩ external load. Finally, the PG2‐15/Al‐TENG practically demonstrates real‐time application energy harvesting applications such as powering 100 LEDs and a stopwatch. [ABSTRACT FROM AUTHOR]

The K family of vitamins includes a collection of molecules with different pharmacokinetic characteristics. Menaquinone-7 (MK-7) has the finest properties and is the most therapeutically beneficial due to its long plasma half-life and outstanding extrahepatic bioavailability. MK-7 exhibits cis–trans isomerism, and merely the all-trans form is biologically efficacious. Therefore, the remedial value of MK-7 end products is exclusively governed by the quantity of all-trans MK-7. Consumers favour fermentation for the production of MK-7; however, it involves several challenges. The low MK-7 yield and extensive downstream processing requirements increase production costs, resulting in an expensive final product that is not universally available. Bacterial cell immobilisation with iron oxide nanoparticles (IONs) can potentially address the limitations of MK-7 fermentation. Uncoated IONs tend to have low stability and can adversely affect cell viability; thus, amine-functionalised IONs, owing to their increased physicochemical stability and biocompatibility, are a favourable alternative. Nonetheless, employing biocompatible IONs for this purpose is only advantageous if the bioactive MK-7 isomer is obtained in the most significant fraction, exploring which formed the aim of this investigation. Two amine-functionalised IONs, namely 3-aminopropyltriethoxysilane (APTES)-coated IONs (IONs@APTES) and L-Lysine (L-Lys)-coated IONs (L-Lys@IONs), were synthesised and characterised, and their impact on various parameters was evaluated. IONs@APTES were superior, and the optimal concentration (300 μ g/mL) increased all-trans MK-7 production and improved its yield relative to the untreated cells by 2.3- and 3.1-fold, respectively. The outcomes of this study present an opportunity to develop an innovative and effective fermentation method that enhances the production of bioactive MK-7. [ABSTRACT FROM AUTHOR]

A one-pot two-stage method for the synthesis of new aminotrisiloxanes has been developed, which consists of the sequential reaction of diphenylsilanediol with 3-aminopropyltriethoxysilane and amino alcohols. The synthesized di-, tetra-, and hexaaminotrisiloxanes have broad potential for use in both organisand macromolecular chemistry, in particular, as effective silicon-containing cross-linking agents and modifiers of epoxy resins. [ABSTRACT FROM AUTHOR]

The mesoporous silica KIT-6 was synthesized and functionalized with 3-aminopropyltriethoxysilane (APTES) by grafting at 110 ◦C. The composites were prepared with three different concentrations of APTES: 20, 30 and 40 wt.%. The as-prepared samples were characterized by thermal gravimetric analysis in air and nitrogen atmosphere (TG/DTA), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction and nitrogen adsorption–desorption. In this study, CO2 adsorption–desorption was investigated using temperature programmed desorption mass spectrometry (TPD-MS) at different temperatures. The adsorption capacity of the prepared composites is 2.23 mmol CO2/g at 40 ◦C and decreases to 0.95 mmol/g at 70 ◦C. Regarding the efficiency of the amino groups, the best result was obtained for APTES-grafted KIT-6 at 40 ◦C, with 0.512 mmol CO2/mmol NH2 . The results showed good cyclical stability in adsorption capacities even after nine adsorption–desorption cycles. [ABSTRACT FROM AUTHOR]

At present, the environmental problems caused by fossil fuels are becoming more prominent, and it is imperative to reduce carbon emissions. Based on this situation, the solar photovoltaic technology has become the fastest growing renewable energy technology, and it has great promise to solve current resource and environmental problems. Owing to the characteristics of adjustable structure, sustainable use, and low cost, the luminescent solar concentrators are attracting more and more attention from among photovoltaic field. The typical luminescent solar concentrator is composed of two parts, including the light waveguide coated or embedded with the emitting fluorophores, a photovoltaic cell mounted on the light waveguide edge. Carbon dots have attracted increasing attention in the field of luminescent solar concentrators due to their environmental friendliness, economic applicability, simple synthesis methods, and excellent optical properties. However, when carbon dots are compatible with hydrophilic polymer waveguide materials as luminescent substrates, the poor compatibility of most carbon dots in polymers and the brittleness of hydrophilic polymers severely limit the practical application of luminescent solar concentrators. In order to solve these problems, the synthesis of a carbon dot doped with other elements or new carbon dot structure has become the focus of attention. In addition, the suitable host matrix needs to be explored, such as organicinorganic hybrid matrix, multifunctional matrix, polysiloxane matrix, etc. In this work, a bright yellow emitting silicon coated carbon dot with a Stokes shift of 150 nm, a quantum yield of 10. 94%, and good dispersibility and compatibility was synthesized using the hydrolysis condensation of 3-aminopropyltriethoxysilane, along with phthalic acid and o-phenylenediamine. At the same time, a series of 3 cm ×3 cm ×0. 1 cm sizes were prepared by combining dimethyl siloxane with good compatibility and high flexibility as the waveguide material, flexible luminescent solar concentrators based on silicon coated carbon dots with different mass percentages, among which the best performing solar concentrator has an energy conversion efficiency of 1. 05%. This work combines the advantages of silicon coated carbon dots with polydimethylsiloxane, which has potential value for the practical application of luminescent solar concentrators. [ABSTRACT FROM AUTHOR]

The generation of nuclear energy produces a large amount of uranium containing wastewater, which must be treated. In this study, amino functionalized bentonite (Bent-NH2) was prepared by modifing Gaomiaozi bentonite with 3-Aminopropyltriethoxysilane. Various characterization results confirmed the successful grafting. The batch adsorption experiments indicated Bent-NH2 reached its maximum adsorption capacity rapidly (20 min), 49.168 mg/g. Notably, Bent-NH2 had better adsorption performance than unmodified bentonite in really groundwater with different pH. This work demonstrates that Bent-NH2 has excellent adsorption performance and can be used for low uranium wastewater treatment and geological disposal. [ABSTRACT FROM AUTHOR]

This study enhances the water resistance of mica paper/organic silicone resin composites through surface modification with 3-aminopropyltriethoxysilane (APTES). The Fourier-transform infrared spectroscopy and the X-ray photoelectron spectroscopy confirmed the formation of chemical bonds between APTES and mica. The results showed that at an optimal APTES concentration of 0.6%, the water diffusion coefficient decreased from 5.0 × 10−3 mm²/min to 2.7 × 10−3 mm²/min, and the permeability coefficient decreased from 5.71 × 10−4 mm²/min to 1.94 × 10−4 mm²/min, with a significant reduction in equilibrium water uptake. Additionally, the modified composites exhibited minimal mechanical strength loss after moisture aging, demonstrating excellent water resistance. The interface shear strength tests revealed a 28.6% increase in interfacial bonding strength after APTES modification. This study demonstrates the potential of silane coupling agents to enhance the performance of inorganic polymer composites, providing theoretical support for their industrial application.

The properties of nanocomposites are directly affected by the filler–matrix interaction and therefore surface filler modification is often necessary to improve the mechanical properties of nanocomposites. Our study evaluated surface modification of sepiolite (SEP) on properties of poly(butylene adipate‐co‐terephthalate) (PBAT)‐based nanocomposites. The nanofillers were modified using two organic modifiers, octadecyl isocyanate (OI), and 3‐aminopropyltriethoxysilane (APTES). OI showed higher treatment efficiency than APTES and better results in alkyl groups on the surface of the nanofiller, with crystalline profile, which remained in the nanocomposites. The effect of organo‐sepiolites on the properties of PBAT nanocomposites was investigated by DSC, XRD, TGA, FTIR, scanning electron microscopy (SEM), and mechanical tensile tests. TGA analysis showed that the addition of O‐SEP on PBAT decreases its thermal stability. SEM analysis showed cavities and fiber tips in the matrix associated with clay agglomerates and some untreated clay faces, which impair filler‐matrix interfacial adhesion. Both treatments increased the elastic modulus and preserved the elongation and tensile strength of PBAT and the treatment with OI results in a higher modulus. Although some studies to improve the clay dispersion are necessary, the promising results reveal the potential of using OI and APTES as SEP modifiers to reinforce PBAT or other polyesters. [ABSTRACT FROM AUTHOR]

In this paper, two types of microspheres encapsulating magnetic carboxyl-modified Fe3O4 have been synthesized to compare their adsorption to Congo Red, one has been prepared by taking 3-aminopropyltriethoxysilane (APTES) as the functional monomer; the other has utilized chitosan and gelatin as the wall materials. The former is named as ASM and the latter is called as CGM. SEM, FTIR, XRD and TGA have been used to characterize the morphology and structure of microspheres. The adsorption experiments have shown that they both could absorb the dye rapidly and continuously and adsorption kinetics conform to pseudo-second-order model. The adsorption test data of ASMs have been fitted better with the Freundlich isotherms. The CGMs follow Langmuir isotherms. The maximum adsorption capacity of the dye onto the former at room temperature is 585 mg/g and the latter is 364 mg/g, indicating highly efficient adsorption capacity. The high reusability means that the products have promising potentials in advanced treatment of industrial wastewater. [ABSTRACT FROM AUTHOR]

Urea-formaldehyde (UF) resins, as the most common adhesives for wood-based composites, emit formaldehyde, which is forcing producers to find a solution to this problem. Using scavengers is a practical way of reducing formaldehyde emissions, but sometimes these materials change the properties of the adhesive. This study investigated the effect of adding nanoclay and nanoclay modified with aminopropyltriethoxysilane (APTES), as scavengers, on the formaldehyde emission and the properties of the urea-formaldehyde resin. Modification of nanoclay with APTES was confirmed by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis. After the addition of nanoclay and modified nanoclay to the urea-formaldehyde resin, the emission of formaldehyde decreased by 22% and 61%, and the physical and mechanical properties were improved. The FTIR, XRD, and differential scanning calorimetry results showed that the addition of nanoclay and modified nanoclay improved the characteristics of the adhesive, reduced the crystalline areas, and delayed the curing of the adhesive. Additionally, according to thermogravimetric analysis results, addition of nanoclay and modified nanoclay increased the thermal stability and reduced the weight loss of urea formaldehyde resin.

The mesoporous silica KIT-6 was synthesized and functionalized with 3-aminopropyltriethoxysilane (APTES) by grafting at 110 °C. The composites were prepared with three different concentrations of APTES: 20, 30 and 40 wt.%. The as-prepared samples were characterized by thermal gravimetric analysis in air and nitrogen atmosphere (TG/DTA), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction and nitrogen adsorption–desorption. In this study, CO2 adsorption–desorption was investigated using temperature programmed desorption mass spectrometry (TPD-MS) at different temperatures. The adsorption capacity of the prepared composites is 2.23 mmol CO2/g at 40 °C and decreases to 0.95 mmol/g at 70 °C. Regarding the efficiency of the amino groups, the best result was obtained for APTES-grafted KIT-6 at 40 °C, with 0.512 mmol CO2/mmol NH2. The results showed good cyclical stability in adsorption capacities even after nine adsorption–desorption cycles.

In this paper, epoxidized solution‐polymerized styrene butadiene rubber (ESSBR) as the matrix and silica as filler, a small quantity of 3‐aminopropyltriethoxysilane (APTES) is used to adjust the cross‐linking network of ESSBR/silica. The effect of two APTES addition methods (ESSBR/APTES/silica and ESSBR/silica/APTES) on the nanocomposite properties is investigated. The epoxy groups of ESSBR and the ethoxy groups of APTES can react with the hydroxyl groups on silica to improve dispersion. At the same time, the amino groups at another end of APTES can react with the epoxy groups of ESSBR to increase the cross‐linking density. Compared with bis(3‐triethoxysilylpropyl) disulfide (TESPD) modified SSBR/silica (SSBR/TESPD/silica), ESSBR/APTES/silica shows 133% improvement in wet‐skid resistance, 14% reduction in rolling resistance with less silane coupling agent and volatile organic compounds emissions. ESSBR/APTES/silica has excellent overall performance and offers a good prospect for the preparation of green tire tread. Highlights: APTES modified silica/ESSBR nanocomposites are prepared.Epoxy groups and APTES react with silica to improve dispersion.APTES can increase the cross‐linking density.The nanocomposite has excellent comprehensive performance as green tire tread.The nanocomposite has less silane coupling agent and VOCs emission. [ABSTRACT FROM AUTHOR]

The aza-Michael reaction of 3-aminopropyltriethoxysilane (1) and -silatrane (2) with acrylates affords functionalized silyl-(3–8) and silatranyl-(9–14) mono- and diadducts with up to a 99% yield. Their structure has been proved with IR and NMR spectroscopies, mass spectrometry and XRD analysis. The hydrolytic homo-condensation of triethoxysilanes 3–5 gives siloxanes 3a–5a, which form complexes with Ag, Cu, and Ni salts. They are also able to adsorb these metals from solutions. The hetero-condensation reaction of silanes 4–8 with OH groups of zeolite (Z), silica gel (S) and glass (G) delivers the modified materials (Z4, S7, G4, G5, G7, G8, etc.), which can adsorb ions of noble metal (Au, Rh, Pd: G4 + Au, G5 + Pd, G7 + Rh). Thus, the synthesized Si-organic polymers and materials turned out to be promising sorbents (enterosorbents) of noble, heavy, toxic metal ions and can be applied in industry, environment, and medicine. [ABSTRACT FROM AUTHOR]

Cervical cancer is an important topic in the study of global health issues, ranking fourth among women's cancer cases in the world. It is one of the nine major cancers that China is focusing on preventing and treating, and it is the only cancer that can be prevented through vaccination. Systematic and effective screening for human papilloma (HPV) infection, which is closely linked to the development of cervical cancer, can reduce cervical cancer incidence and mortality. In this paper, an electrochemical sensor was designed to detect HPV 16 using dual-signal amplification. An APTES-modified glassy carbon electrode was used for improved stability. Gold nanoparticles and a chain amplification reaction were combined for signal amplification. The limit of detection (LOD) of this electrochemical sensor was 1.731 × 10−16 mol/L, and the linear response of the target detector range was from 1.0 × 10−13 mol/L to 1.0 × 10−5 mol/L (R2 = 0.99232). The test of serum sample recovery showed that it has good anti-interference, and the performance of all aspects was improved to different degrees compared with the previous research from the team. The designed sensor is centered around the principles of low cost, high sensitivity and stability, which provides new ideas for the future development of cervical cancer prevention and electrochemical biosensors. [ABSTRACT FROM AUTHOR]

Urea-formaldehyde (UF) resins, as the most common adhesives for woodbased composites, emit formaldehyde, which is forcing producers to find a solution to this problem. Using scavengers is a practical way of reducing formaldehyde emissions, but sometimes these materials change the properties of the adhesive. This study investigated the effect of adding nanoclay and nanoclay modified with aminopropyltriethoxysilane (APTES), as scavengers, on the formaldehyde emission and the properties of the urea-formaldehyde resin. Modification of nanoclay with APTES was confirmed by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis. After the addition of nanoclay and modified nanoclay to the urea-formaldehyde resin, the emission of formaldehyde decreased by 22% and 61%, and the physical and mechanical properties were improved. The FTIR, XRD, and differential scanning calorimetry results showed that the addition of nanoclay and modified nanoclay improved the characteristics of the adhesive, reduced the crystalline areas, and delayed the curing of the adhesive. Additionally, according to thermogravimetric analysis results, addition of nanoclay and modified nanoclay increased the thermal stability and reduced the weight loss of urea formaldehyde resin. [ABSTRACT FROM AUTHOR]

Abstract：Oily wastewater is generated inevitably in the production processes of iron and steel products. It poses a threat to the environment and consequently to human health if not handled properly. In this study, a hydrophobic and oleophilic KH550-TiO2@PDMS@PU modified sponge was prepared by a simple one-step impregnation method. TiO2 nanoparticles, 3-aminopropyltriethoxysilane（KH550）, and polydimethylsiloxane（PDMS） were the main starting chemicals. Due to the low surface energy of PDMS and the rough structure caused by the KH550-modified TiO2 particles, the sponge was converted to a hydrophobic material and the water contact angle was（147.25±1.44）°. The modified sponge could maintain stable hydrophobicity and durability under complicated conditions such as gluing, extrusion, acid and alkali, and ultrasonication. It could absorb oil up to 20-25 times its own weight by means of the adsorption-extrusion cycle. The excellent oil/water separation performance suggests that the KH550-TiO2@PDMS@PU sponge with advantages of being non-toxic, easy to prepare, stable and hydrophobic has a broad application prospect in the steel industry. MoreReset [ABSTRACT FROM AUTHOR]

This study involves the fabrication of mixed matrix membranes (MMMs) for ultrafiltration, which contained 3‐aminopropyltriethoxysilane modified magnetite iron oxide nanoparticles (A‐Fe3O4 NPs), through a modified phase inversion technique. The physiochemical properties and surface morphologies of both the as‐synthesized A‐Fe3O4 NPs and fabricated MMMs were examined using advanced characterization techniques. The quasi‐spherical A‐Fe3O4 NPs had an average particle size of 12 nm and a Brunauer–Emmett–Teller surface area of 131.38 m2/g. Analysis by Fourier transform infrared and Raman spectroscopy confirmed the presence of NH2 and OH functional groups grafted onto the Fe3O4 NPs. The incorporation of higher loadings of A‐Fe3O4 NPs in the membrane matrix significantly improved the adsorptive ability and hydrophilicity of the adsorbent, leading to improved membrane water permeance, adsorption rate, and adsorption‐filtration properties. The water contact angle decreased from 70.7° to 63.2°, and the flux increased from 239.9 to 443.8 L/m2.h, while overall membrane porosity increased from 43.4% to 51.9%. [ABSTRACT FROM AUTHOR]

The goal of this work is to investigate the effectiveness of amorphous SiO2−FexOy loaded by functionalization with Ce(SO4)2, Li2SO4, and 3-aminopropyltriethoxysilane (APTES) for CO2 adsorption. Silica and iron-based materials are gaining popularity due to their wide range of applications, such as catalysis, photocatalysis, imaging, etc.; however, there are very few studies regarding the adsorption of CO2 with the aforementioned materials. In our study, we proposed to test their ability in this direction by adding cerium sulfate and lithium sulfate. Three base materials were obtained and characterized using XRD, FTIR, RAMAN, TG, SEM, and BET followed by their functionalization with amino groups by using of the APTES precursor. The SEM images indicate an increase in size, forming clusters from 100 nm for base materials to 500 nm for functionalized materials. The results indicate a maximum CO2 adsorption of 1.58 mmol/g material for the SiO2−FexOy−Li−APTES sample. [ABSTRACT FROM AUTHOR]

To improve the fire safety of epoxy resins (EP), a composite with magnesium hydroxide loaded zinc borate (MH@ZBO) was obtained using a heterogeneous deposition method, and then 3‐aminopropyltriethoxysilane (APES) was grafted onto the surface of MH@ZBO to produce an organic–inorganic hybrid (MH@ZBO‐APES). Subsequently, the EP composite with added MH@ZBO‐APES was prepared and its thermal properties and fire safety were evaluated. The results showed that the glass transition temperatures of the EP/MH@30ZBO‐10APES composite are improved, and the maximum thermal decomposition rate decreased, and the samples exhibited favorable thermal stability and flame‐retarding performance (flame retardancy index: 2.40; LOI: 33%). The enhanced fire safety was a result of two factors. On one hand, the endothermic decomposition of MH and ZBO and the physical barrier of their decomposition products, the catalytic carbonization function of ZBO, the synergistic flame retardation of APES, and its improvement in dispersion to form a denser carbon layer, which plays a role in fire retardation and smoke suppression in the condensed phase. On the other hand, water vapor produced by the decomposition of MH and ZBO, as well as incombustible gas produced by the degradation of APES, are vital in the gas phase. [ABSTRACT FROM AUTHOR]

Zinc(II) bis(3-aminiumpropylsilsesquioxane)(1-hydroxyethylidene)diphosphonate tetrahydrate and manganese(II) bis(3-aminiumpropylsilsesquioxane)(1-hydroxyethylidene)diphosphonate trihydrate were obtained by the reactions of aqueous solution of 3-aminopropyltriethoxysilane with (1-hydroxyethylidene)diphosphonates of zinc(II) H2ZnL·2H2O and manganese(II) H2MnL·3H2O. The synthesized compounds were studied by the methods of elemental, thermal, and X-ray phase analysis, IR spectroscopy, and scanning electron microscopy. The specific surface areas of the initial xerogels and products of their thermal decomposition were measured. [ABSTRACT FROM AUTHOR]

High silica cloth (HSC) with high mechanical strength, good flexibility, superior heat and acid resistance has been modified by one-step grafting method and self-polymerization method. 3-Aminopropyltriethoxysilane (APTES) is grafted on HSC's surface as a double-side adhesive. Nano SiO2 is used to provide surface roughness by electrostatic deposition. After that, polydopamine (PDA) with strong hydrophilic properties is polymerized on the surface of HSC to obtain super-hydrophilic/underwater oil-phobic high silica cloth (APTES/SiO2/ PDA@HSC). The effect of different sizes (50, 300, 500 nm) of SiO2 on the oil-water separation performance is studied. The separation efficiency decreases with the increase of SiO2 size. APTES/50 nm SiO2/PDA@HSC shows the best performance. Its water contact angle is 0(°) and the separation efficiency is about 98%. The oil content of the filtrate after separating the gasoline-water mixture is as low as 37 mg/L and the oil-water mixture flux is 7184 L/(m² ·h). Its separation efficiency can still reach 97. 4% after 10 cycles, and it also has obvious oil-water separation effect on peanut oil and pump oil. [ABSTRACT FROM AUTHOR]

Small-molecule dyes with longer wavelength and higher photoluminescence quantum yield (PLQY) in water have attracted increasing attention due to their bright potential in fluorescence analysis technologies. Here, a red-emitting fluorescent dye of 1,2,4-triaminobenzene (TriAB) was modified with 3-aminopropyltriethoxysilane (APTES) to avoid contact with water molecules and to suppress fluorescence quenching due to O-H vibrations in water. The formation of a silica-like structure from hydrolytically polycondensed APTES was confirmed by X-ray diffractometry and Fourier-transform infrared absorption spectroscopy. Modification of TriAB with hydrolytically polycondensed APTES induced orange emission in the powder state, although TriAB powder did not exhibit any fluorescence before modification. The PLQY of APTES-modified TriAB in water was 11.1 %, which was higher than that of TriAB in water, 4.5 %. These results confirmed that the APTES derived silica-like matrix shielded TriAB from both water and intermolecular interactions with other TriAB molecules, overcoming fluorescence quenching. Orange-emitting TriAB-APTES powder was obtained by modifying TriAB with APTES, with the photoluminescence quantum yield of TriAB in water significantly enhanced. The silica-like structure formed around TriAB molecules mitigates concentration quenching in the powder state and suppresses non-radiative relaxation via O-H vibrations in water. [Display omitted] • Orange-emitting TriAB-APTES powder was prepared by modifying TriAB with APTES. • Photoluminescence quantum yield of TriAB in water was enhanced after APTES modification. • Hydrolytically polycondensed APTES forms a rigid, silica-like structure around TriAB. • APTES modification mitigates concentration quenching of TriAB in the powder state. • APTES modification suppresses non-radiative relaxation of TriAB in water via O-H vibrations. [ABSTRACT FROM AUTHOR]

Aflatoxin B1, a common food contaminant in peanuts and corn and a genotoxic carcinogen in humans poses a significant risk for hepatocellular carcinoma, making its detection crucial; this study aims to develop a label-free electrochemical biosensor using a disposable indium tin oxide polyethylene terephthalate (ITO-PET) electrode modified with 3-Aminopropyltriethoxysilane for detecting Aflatoxin B1 in real food samples. Initially, optimization steps for the proposed biosensor were conducted using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. Characterization steps such as storage capacity, regeneration, and single frequency impedance (SFI) were completed for the proposed disposable biosensor after the optimization steps. The electrochemical biosensor, based on AFB1, exhibited excellent repeatability and reproducibility. It had a broad dynamic detection range from 0.1 fg/mL to 500 fg/mL, with low limits of detection (LOD) and quantitation (LOQ) at 0.19 fg/mL and 0.65 fg/mL, respectively. Finally, the proposed AFB1-based biosensor system was applied to real food samples (rice, chili pepper, milk, corn, and peanuts) for testing and validation. • The biosensor system that is based on 3-APTES is disposable, low-cost, and highly sensitive. • Biosensor system analytical performance is excellent. It has a linear dynamic range of 0.1–500 fg/mL. • The AFB1 mycotoxin, a substantial health hazard, is effectively detected in commonly ingested foods by the system. [ABSTRACT FROM AUTHOR]

Dye effluent damaged the water environment and human health with its massive discharge. In order to eliminate dye from the water environment, a variety of adsorbents were used to investigate dye removal. Graphene oxide (GO) attracted extensive attention due to its excellent surface property in the degradation of dye wastewater. Modified GO with multifunctional groups helped to improve adsorption performance. 3-Aminopropyltriethoxysilane modified GO (AS-GO) was fabricated for the removal of Orange G (OG) in this study. The results showed that AS-GO had an excellent adsorption ability of OG. During the reaction process, the maximum adsorptive capacity of OG was up to 576.6 mg/g at T = 313 K and pH = 3 with the initial OG concentration of 100 mg/L and the initial adsorbent dose of 2.5 g/L. The adsorption kinetic process of AS-GO conformed to the pseudo-second-order and Langmuir models. The spontaneous and endothermic adsorption of OG occurred in the adsorption process. The main adsorption mechanisms were electrostatic, π–π and hydrogen bonding interactions in the reaction process. After four cycles of AS-GO, it maintained high removal efficiency owing to its remarkable stability. The scheme of GO modified with AS could hinder the agglomeration of GO and provide more active sites, which would further enhance the adsorption properties and expand its application in water purification. [ABSTRACT FROM AUTHOR]

Cervical cancer is an important topic in the study of global health issues, ranking fourth among women’s cancer cases in the world. It is one of the nine major cancers that China is focusing on preventing and treating, and it is the only cancer that can be prevented through vaccination. Systematic and effective screening for human papilloma (HPV) infection, which is closely linked to the development of cervical cancer, can reduce cervical cancer incidence and mortality. In this paper, an electrochemical sensor was designed to detect HPV 16 using dual-signal amplification. An APTES-modified glassy carbon electrode was used for improved stability. Gold nanoparticles and a chain amplification reaction were combined for signal amplification. The limit of detection (LOD) of this electrochemical sensor was 1.731 × 10−16 mol/L, and the linear response of the target detector range was from 1.0 × 10−13 mol/L to 1.0 × 10−5 mol/L (R2 = 0.99232). The test of serum sample recovery showed that it has good anti-interference, and the performance of all aspects was improved to different degrees compared with the previous research from the team. The designed sensor is centered around the principles of low cost, high sensitivity and stability, which provides new ideas for the future development of cervical cancer prevention and electrochemical biosensors.

The goal of this work is to investigate the effectiveness of amorphous SiO2−FexOy loaded by functionalization with Ce(SO4)2, Li2SO4, and 3-aminopropyltriethoxysilane (APTES) for CO2 adsorption. Silica and iron-based materials are gaining popularity due to their wide range of applications, such as catalysis, photocatalysis, imaging, etc.; however, there are very few studies regarding the adsorption of CO2 with the aforementioned materials. In our study, we proposed to test their ability in this direction by adding cerium sulfate and lithium sulfate. Three base materials were obtained and characterized using XRD, FTIR, RAMAN, TG, SEM, and BET followed by their functionalization with amino groups by using of the APTES precursor. The SEM images indicate an increase in size, forming clusters from 100 nm for base materials to 500 nm for functionalized materials. The results indicate a maximum CO2 adsorption of 1.58 mmol/g material for the SiO2−FexOy−Li−APTES sample.

[Display omitted] • Utilizing siloxane surfactants enable the top surface reconstruction of CsPbI 3. • A self-assembled siloxane ligand layer is formed on the surface of CsPbI 3. • The phase transition of CsPbI 3 can be efficiently suppressed. • The surface and interfacial defects in the perovskite are well passivated. • A champion efficiency of 21.42 % is achieved for CsPbI 3 solar cell. All-inorganic perovskite is a promising candidate for solar cell applications. However, a significant challenge lies in its poor phase stability to environmental moisture. To address this problem, we develop a strategy for in-situ reconstruction of the CsPbI 3 surface using siloxane surfactants such as 3-aminopropyltriethoxysilane (APTES) and 3-aminopropyltrimethoxysilane (APTMS), which both demonstrate multifunctional roles in surface engineering. The siloxanes undergo air-induced hydrolysis, leading to the formation of Si-O-Si networks. Additionally, the –NH 2 convert to –NH 3 +, enabling interaction with the I− ions on the surface of CsPbI 3. This facilitates the formation of a self-assembled siloxane cross-linked ligand layer, which offers extra function for providing water and oxygen shielding, consequently stabilizing the surface of CsPbI 3. Furthermore, the siloxane surfactants can passivate uncoordinated Pb2+ ions, resulting in a reduction of non-radiative recombination at the interface, thereby significantly augmenting device performance and stability. Following research comparisons, APTES with longer alkyl chains displays superior performance. As a result, with the APTES passivation, the PCE is increased from 19.01 % to 21.42 %, which is one of the highest PCE devices in pure CsPbI 3 PSCs reported so far. Meanwhile, the devices treated with APTES show superior moisture stability over those without APTES, especially in the absence of encapsulation. [ABSTRACT FROM AUTHOR]

To solve the problems of flammability, smoldering, smoking and flame retardant durability of cotton fabric, flame retardant fininshing was executed using spray assisted self-assembly method, and P/N/Si synergistic flame retardant system was constructed by polyethylene imine (PEI), phytic acid (PA) and 3-aminopropyltriethoxysilane (APTES). Cotton cellulose carbonized at low temperature prompting by PA catalytic effect, and this cooperated with PEI thermal decomposition to endow cotton fabric with flame retardancy and smoking suppression by reducing its pyrolysis rate at high temperature and lessening combustible products. Meanwhile APTES as silane coupling agent further improved its flame retardant durability and smoke suppression effect. The synchronous thermal analysis results indicate that cotton fabrics treated by PA/PEI/APTES composite system present significant low-temperature carbonization trend, and their initial decomposition temperatures advance by 46.5℃-75.9℃. Moreover, they form 4.6 %-44.9 % aromatic structure char through dehydration and carbonization reactions during the low-temperature carbonization process, improving their thermal stability at high temperature, and their after-flame and smoldering phenomena disappear. The damaged length of treated fabric with five layers reduces to 5.0 cm, its limiting oxygen index reaches 33.7 %, and it presents excellent flame retardant durability and smoke suppression effect. This low-temperature carbonization mechanism possesses importantly innovative significance for the flame retardant finishing of cotton fabric, and it not only more actively guides the selection of flame retardants to make them match with the material required, but provides a new thinking method for flame retardant material research in the future. [Display omitted] • Treated cotton fabric presents low temperature carbonization trend. • Flame retardants firstly degrade and form expanded layer on fabric surface. • Dehydration and carbonization of treated cotton fabric advanced 46.5 ℃ −75.9 ℃. • Polyethylene imine, phytic acid and 3-aminopropyltriethoxysilane show synergism. • Fabric smoke suppression and flame-retardant durability were achieved. [ABSTRACT FROM AUTHOR]

Reducing the cement content in the concrete mix by developing cementitious materials with enhanced properties can contribute considerably to cut the CO2 emissions produced by the cement industry. In this work, we used a bottom-up approach to enhance the mechanical performance of the calcium silicate hydrate (C-S-H), by the covalent bonding of the 3-aminopropyltriethoxysilane (APTES), to create a nano-hybrid C-S-H/APTES. The intercalation of APTES within the C-S-H contributes to increase the bulk modulus by 35 % due to the stiffening along all the lattice directions. The stiffer behavior along a- and b- lattice directions is due to the formation of covalent bonds between the APTES molecules and the non-bonding oxygens of the C-S-H, blocking the silicate chain relaxation and increasing the overall stiffness of the ab-plane. In the c-direction, the stiffening is attributed to the densification of the hydrogen bond network in the interlaminar space caused by the APTES intercalation. [Display omitted] • Covalent bonding between APTES and C-S-H increases the bulk modulus by 40 %. • MD simulations provide insights into strengthening mechanisms within C-S-H. • Strengthening is attributed to the densification of the interlaminar space. • Covalent bonds formation between APTES and C-S-H imposes constraints on deformation. • APTES configurations within C-S-H structure facilitate the formation of a secondary hydrogen bond. [ABSTRACT FROM AUTHOR]

High-risk human papillomavirus (HPV) infection is an important cause of cervical cancer formation; therefore, being able to detect high-risk HPV (e.g., HPV-16) is important for the early treatment and prevention of cervical cancer. In this study, a combination of a 3-aminopropyltriethoxysilane (APTES) modified gold electrode and a super sandwich structure was creatively developed, resulting in the development of a biosensor that is both sensitive and stable for the detection of HPV-16. The electrochemical biosensor possesses a lower detection limit compared with previous studies with an LOD of 5.475 × 10−16 mol/L and it possesses a wide linear range from 1.0 × 10−13 mol/L to 1.0 × 10−6 mol/L (R2 = 0.9923) for the target DNA. The experimental data show that the sensor has good stability, and there is no significant decrease in the current response value after 7 days in the low-temperature environment. In addition, the sensor proved to be a powerful clinical tool for disease diagnosis because it showed good interference resistance in complex human serum samples. [ABSTRACT FROM AUTHOR]

A new ferrocene- and silane-containing Schiff base was synthesized by the reaction of 1-acetylferrocene with 3-aminopropyltriethoxysilane. The structure of the new compound was confirmed by physicochemical methods. The heat treatment of the Schiff base and a glass cloth impregnated with the Schiff base afforded magnetic materials. [ABSTRACT FROM AUTHOR]

In this work, the influence of the modifier concentration and the temperature of modification on the antibacterial and photocatalytic properties of titanium dioxide (TiO2) functionalized with 3-aminopropyltriethoxysilane (APTES) was investigated. The new APTES/TiO2 nanomaterials were obtained by the solvothermal method. The studies confirmed the presence of N, C and Si in the TiO2 structure, indicating that the modification was performed successfully. Furthermore, the antibacterial properties of the samples were investigated based on Escherichia coli inactivation in saline solution. The decomposition of methylene blue determined the photocatalytic activity under UV irradiation. For the E. coli inactivation process, the best concentration of the photocatalyst was 0.1 g/L, while for dye degradation tests, the optimum semiconductor dose was 0.5 g/L. The best antibacterial properties presented photocatalysts obtained by modification with 250 mM of APTES solution. In the case of methylene blue decomposition, the photoactivity increased with the increase of APTES concentration, while the modification temperature from 120°C to 180°C had no significant impact on the activity of the tested s amples. [ABSTRACT FROM AUTHOR]

[Display omitted] Developing cost-effective and stable non-noble electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is now the critical issue for large-scale application of zinc-air batteries. Here, we presented a simple method to synthesize highly dispersed cobalt manganate spinel nanodots in-situ embedded in amine-functionalized carbon black. Silane coupling agent 3-aminopropyltriethoxysilane (APTES) played dual roles in the preparation: (1) to achieve amine-functionalization of carbon support; (2) as weak alkali to precipitate metal hydroxides which were then converted to spinel nanodots after mild calcination. The hydrophilicity of the carbon substrate was enhanced by amine modification from APTES to disperse metal oxide evenly, and the electrochemical activity was promoted through the strong interface interaction between embedded spinel nanodots and carbon substrate during the calcination process. As expected, the CoMn 2 O 4 /C-NH 2 -300 catalyst exhibited satisfactory bifunctional catalytic performance for both ORR and OER with an ΔE (E 1/2 -E j10) = 0.75 V, which was lower than most state-of-the-art catalysts. In addition, CoMn 2 O 4 /C-NH 2 -300 as a cathode also exhibited remarkable zinc-air battery performance in alkaline solution. This strategy of APTES as a bifunctional coupling agent provided a novel way to design and explore highly active, durable, and cost-effective catalysts for renewable energy conversion and storage. [ABSTRACT FROM AUTHOR]

Two amino-functionalized diatomite (DE) composites modified by 3-aminopropyltriethoxysilane (APTS) or glycine (GLY) (i.e., APTS/DE and GLY/DE) were successfully synthesized via the wet chemical method for the time- and cost-efficient removal of indoor formaldehyde (HCHO). First, the optimal preparation conditions of the two composites were determined, and then their microstructures and morphologies were characterized and analyzed. Batch HCHO adsorption experiments with the two types of amino-modified DE composites were also conducted to compare their adsorption properties. Experimental results indicated that the pseudo-second-order kinetic and Langmuir isotherm models could well describe the adsorption process, and the maximum adsorption capacities of APTS/DE and GLY/DE prepared under optimal conditions at 20°C were 5.83 and 1.14 mg·g−1, respectively. The thermodynamic parameters of the composites indicated that the adsorption process was spontaneous and exothermic. The abundant amine groups grafted on the surface of DE were derived from the Schiff base reaction and were essential for the high-efficient adsorption performance toward HCHO. [ABSTRACT FROM AUTHOR]

Currently, in order to obtain high-tech hybrid products, modern adhesives have high requirements for creating strong joints between dissimilar materials. It is known that adhesion depends on the compatibility of the adhesives with the surfaces of the materials. Amine compounds are the main hardeners for epoxy compositions. That is why, in this article, we synthesized silicon-containing amines based on polyfunctional aminoalkoxysiloxanes for epoxy compositions. Aminoalkoxysiloxanes were prepared by the interaction of 3-aminopropyltriethoxysilane with monoethanolamine in nitrogen at atmospheric pressure in the presence of a binary antioxidant and catalytic amounts of an alkali metal alcoholate. During the reaction in a homogeneous phase, the reaction mixture was heated to a temperature of 100-110 °C and distilled off to 90% of ethanol from the theoretically calculated amount. Further, the reaction was carried out at a reduced temperature of 10-20 mmHg pressure until the release of alcohol stops. At the same time, gravimetric control was carried out and the refractive index of the reaction mixture was measured. As a result, aminoalkoxysilanes were obtained in the form of light-yellow oily liquids. The structure of the obtained compounds was investigated by IR spectroscopy on an FSM-1202 Fourier spectrophotometer and 1H NMR spectroscopy on a high-resolution BrukerWM-250 NMR spectrometer. It was found that under the selected synthesis conditions, aminopropyltri-(2-aminoethoxy)silane is obtained with the highest yield of 97.6% at a molar ratio of 3-aminopropyltriethoxysilane AGM-9 with monoethanolamine 1:3.

The reaction of 3-aminopropyltriethoxysilane with (1-hydroxyethylidene)diphosphonic acid in 96% ethanol results in the 3-hydroxy(ethoxy)silylpropylaminium salt of (1-hydroxyethylidene)diphosphonic acid. The compound dissolves in water and is regenerated after evaporation and drying in air and in vacuum. The initial low-porous xerogel and the products of its pyrolysis in air and in an inert atmosphere are amorphous phases with impurities of crystalline components. The reaction of tetraethoxysilane with (1-hydroxyethylidene)diphosphonic acid leads to a completely amorphous non-porous condensation product, which loses 57% of its weight after treatment with water. [ABSTRACT FROM AUTHOR]

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Dye effluent damaged the water environment and human health with its massive discharge. In order to eliminate dye from the water environment, a variety of adsorbents were used to investigate dye removal. Graphene oxide (GO) attracted extensive attention due to its excellent surface property in the degradation of dye wastewater. Modified GO with multifunctional groups helped to improve adsorption performance. 3-Aminopropyltriethoxysilane modified GO (AS-GO) was fabricated for the removal of Orange G (OG) in this study. The results showed that AS-GO had an excellent adsorption ability of OG. During the reaction process, the maximum adsorptive capacity of OG was up to 576.6 mg/g at T = 313 K and pH = 3 with the initial OG concentration of 100 mg/L and the initial adsorbent dose of 2.5 g/L. The adsorption kinetic process of AS-GO conformed to the pseudo-second-order and Langmuir models. The spontaneous and endothermic adsorption of OG occurred in the adsorption process. The main adsorption mechanisms were electrostatic, π–π and hydrogen bonding interactions in the reaction process. After four cycles of AS-GO, it maintained high removal efficiency owing to its remarkable stability. The scheme of GO modified with AS could hinder the agglomeration of GO and provide more active sites, which would further enhance the adsorption properties and expand its application in water purification.

In this work, the impact of TiO2 properties on the CO2 adsorption properties of titanium dioxide modified with 3-aminopropyltriethoxysilane (APTES) was presented. The APTES-modified TiO2 materials were obtained by solvothermal process and thermal modification in the argon atmosphere. The prepared adsorbents were characterized by various techniques such as X-ray diffraction (XRD), Fourier transform infrared (DRIFT), thermogravimetric analysis and BET specific surface area measurement. CO2adsorption properties were measured at different temperatures (0, 30, 40, 50 and 60 °C). Additionally, the carbon dioxide cyclic adsorption-desorption measurements were also investigated. The results revealed that modifying TiO2 with APTES is an efficient method of preparing CO2 sorbents. It was found that the CO2 adsorption capacity for the samples after modification with APTES was higher than the sorption capacity for unmodified sorbents. The highest sorption capacity reached TiO2-4 h-120 °C-100 mM-500 °C sample. It was also found that the CO2 adsorption capacity shows excellent cyclic stability and regenerability after 21 adsorption-desorption cycles.

Polyfunctional silylureas were synthesized by the interaction of 3-aminopropyltriethoxysilane with isocyanates of various structures in an inert aromatic solvent. Commercially available diisocyanates such as isophorone diisocyanate, hexamethylene diisocyanate, 2,4-toluene diisocyanate were used as isocyanates. In this case, freshly distilled toluene was used as a solvent. The structures of the obtained compounds were confirmed by the data of IR and NMR1H spectroscopy. Using the synthesized compounds, formulations of compositions for electrodeposition of a tin-indium alloy on a copper wire were developed. The possibility of using silylureas of various structures as effective surfactants used in the electrodeposition of the tin-indium alloy is shown. The operational characteristics of the obtained wire were investigated, including the wire diameter, coating thickness, tensile strength, electrical resistance, and direct current electrical resistivity.

The mechanical output of contracting cardiomyocytes, the muscle cells of the heart, relates to healthy and disease states of the heart. Culturing cardiomyocytes on arrays of elastomeric microposts can enable inexpensive and high-throughput studies of heart disease at the single-cell level. However, cardiomyocytes weakly adhere to these microposts, which limits the possibility of using biomechanical assays of single cardiomyocytes to study heart disease. We hypothesized that a stable covalent attachment of laminin to the surface of microposts improves cardiomyocyte contractility. We cultured cells on polydimethylsiloxane microposts with laminin covalently bonded with the organosilanes 3-glycidoxypropyltrimethoxysilane and 3-aminopropyltriethoxysilane with glutaraldehyde. We measured displacement of microposts induced by the contractility of mouse neonatal cardiomyocytes, which attach better than mature cardiomyocytes to substrates. We observed time-dependent changes in contractile parameters such as micropost deformation, contractility rates, contraction and relaxation speeds, and the times of contractions. These parameters were affected by the density of laminin on microposts and by the stability of laminin binding to micropost surfaces. Organosilane-mediated binding resulted in higher laminin surface density and laminin binding stability. 3-glycidoxypropyltrimethoxysilane provided the highest laminin density but did not provide stable protein binding with time. Higher surface protein binding stability and strength were observed with 3-aminopropyltriethoxysilane with glutaraldehyde. In cultured cardiomyocytes, contractility rate, contraction speeds, and contraction time increased with higher laminin stability. Given these variations in contractile function, we conclude that binding of laminin to microposts via 3-aminopropyltriethoxysilane with glutaraldehyde improves contractility observed by an increase in beating rate and contraction speed as it occurs during the postnatal maturation of cardiomyocytes. This approach is promising for future studies to mimic in vivo tissue environments.

Daunorubicin (DNR) is an effective inhibitor of an array of proteins involved in neovascularization, including VEGF and PDGF. These growth factors are directly related to retina scar formation in many devastating retinal diseases. Due to the short vitreous half-life and narrow therapeutic window, ocular application of DNR is limited. It has been shown that a porous silicon (pSi) based delivery system can extend DNR vitreous residence from a few days to 3months. In this study we investigated the feasibility of altering the pore size of the silicon particles to regulate the payload release. Modulation of the etching parameters allowed control of the nano-pore size from 15nm to 95nm. In vitro studies showed that degradation of pSiO2 increased with increasing pore size and the degradation of pSiO2 was approximately constant for a given particle type. The degradation of pSiO2 with 43nm pores was significantly greater than the other two particles with smaller pores, judged by observed and normalized mean Si concentration of the dissolution samples (44.2±8.9 vs 25.7±5.6 or 21.2±4.2μg/mL, p

Anode modification plays a key role in higher power output in marine sediment microbial fuel cells (MSMFCs). A low-molecular organosilicon compound (3-aminopropyltriethoxysilane) was grafted onto the surface of carbon felt using chemical method and a composite modified anode was prepared through organic ligands coordination Fe3+ for better electro-chemical performance. Results show that the biofilm resistance of the composite modified anode (2707 δ) is 1.3 times greater than that of the unmodified anode (2100 Ω), and its biofilm capacitance also increases by 2.2 times, indicating that the composite modification promotes the growth and attachment of electroactive bacteria on the anode. Its specific capacitance (887.8 F m−2) is 3.7 times higher than that of unmodified anode, generating a maximum current density of 1.5 Am−2. In their Tafel curves, the composite modified anodic exchange current density (5.25×10−6 A cm−2) is 5.8 times bigger than that of unmodified anode, which suggests that the electrochemical activity of redox, anti-polarization ability and electron transfer kinetic activity are significantly enhanced. The marine sediment microbial fuel cell with the composite modified anode generates the higher power densities than the blank (203.8 mWm−2 versus 45.07 mWm−2), and its current also increases by 4.4 times. The free amino groups on the anode surface expands a creative idea that the modified anode ligates the natural Fe(III) ion in sea water in the MSMFCs for its higher power output. [ABSTRACT FROM AUTHOR]

Gold nanoparticles (AuNPs) synthesis in dispersion, passivated by different molecules, has been widely studied for many years. Moreover, incorporation or synthesis of these AuNPs on substrates also target different applications. However, there is little research on AuNPs synthesized directly anchored on the substrate, using an amino-functionalized molecule as a reducing agent. In this contribution, we report the synthesis of AuNPs anchored on silica substrate in which 3-aminopropyltriethoxisilane (APTES) acted both as functionalizing agent—anchoring metal ion on substrate—as well as a non-conventional reducing agent by heat treatment, resulting in a facile synthesis route. Results show that APTES use in reduction stage led to smaller AuNPs with very similar sizes—5 nm average diameter, resulting in AuNPs films anchored on silica substrate more homogeneous and reproducible than using the conventional reducing agent (sodium borohydride). [ABSTRACT FROM AUTHOR]

Attapulgite is a promising adsorbent for removal of anionic dyes in water after being modified with 3-aminopropyltriethoxysilane, and four kinetics models and three isotherm models were used to evaluate the adsorption behavior of Congo red onto the adsorbents. It indicated that pseudo-second-order and Sips models were better to describe the adsorption data. Based on Sips model, it was confirmed that the modified attapulgite exhibited a higher adsorption capability for Congo red due to the more high-energy sites. Furthermore, high temperature and acidic environment were conducive to adsorbing Congo red on attapulgite, but the adsorption of the modified attapulgite toward Congo red was not sensitive to the temperature and pH value. A hydrophobic surface of the modified attapulgite reduced the surface tension between adsorbent and dye molecules, and electrostatic interaction played an important role for adsorption of CR on APTES/ATP. [Display omitted] • APTES modified attapulgite is an efficient adsorbent for removal of anionic dyes. • Site energy distribution theory is used to investigate the adsorption process. • Electrostatic interaction plays an important role for adsorption of CR on APTES/ATP. [ABSTRACT FROM AUTHOR]

Owing to the localized surface plasmon resonance (LSPR), dynamic manipulation of optical properties through the structure evolution of plasmonic nanoparticles has been intensively studied for practical applications. This paper describes a novel method for direct reversible self-assembly and dis-assembly of Au nanoparticles (AuNPs) in water driven by pH stimuli. Using 3-aminopropyltriethoxysilane (APTES) as the capping ligand and pH-responsive agent, the APTES hydrolyzes rapidly in response to acid and then condenses into silicon. On the contrary, the condensed silicon can be broken down into silicate by base, which subsequently deprotonates the APTES on AuNPs. By controlling condensation and decomposition of APTES, the plasmonic coupling among adjacent AuNPs could be reversible tuned to display the plasmonic color switching. This study provides a facile and distinctive strategy to regulate the reversible self-assembly of AuNPs, and it also offers a new avenue for other plasmonic nanoparticles to adjust plasmonic properties via reversible self-assembly.

High-risk human papillomavirus (HPV) infection is an important cause of cervical cancer formation; therefore, being able to detect high-risk HPV (e.g., HPV-16) is important for the early treatment and prevention of cervical cancer. In this study, a combination of a 3-aminopropyltriethoxysilane (APTES) modified gold electrode and a super sandwich structure was creatively developed, resulting in the development of a biosensor that is both sensitive and stable for the detection of HPV-16. The electrochemical biosensor possesses a lower detection limit compared with previous studies with an LOD of 5.475 × 10−16 mol/L and it possesses a wide linear range from 1.0 × 10−13 mol/L to 1.0 × 10−6 mol/L (R2 = 0.9923) for the target DNA. The experimental data show that the sensor has good stability, and there is no significant decrease in the current response value after 7 days in the low-temperature environment. In addition, the sensor proved to be a powerful clinical tool for disease diagnosis because it showed good interference resistance in complex human serum samples.

The authors report a novel, effective and enhanced method of conjugating anticancer drug, paclitaxel and gallic acid with magnetosomes. Here, anticancer drugs were functionalised with magnetosomes membrane by direct and indirect (via crosslinkers: glutaraldehyde and 3‐aminopropyltriethoxysilane) adsorption methods. The prepared magnetosome–drug conjugates were characterised by Fourier transform infrared, zeta potential, field‐emission scanning electron microscope and thermogravimetric analysis/differential scanning calorimetry. The drug‐loading efficiency and capacity were found to be 87.874% for paclitaxel (MP) and 71.3% for gallic acid (MG), respectively as calculated by ultraviolet spectroscopy and high‐performance liquid chromatography. The drug release demonstrated by the diffusion method in phosphate buffer (PBS), showing a prolonged drug release for MP and MG, respectively. The cytotoxicity effect of the MP and MG displayed cytotoxicity of 69.71%, 55.194% against HeLa and MCF‐7 cell lines, respectively. The reactive oxygen species, acridine orange and ethidium bromide and 4, 6‐diamidino‐2‐phenylindole staining of the drug conjugates revealed the apoptotic effect of MP and MG. Further, the regulation of tumour suppressor protein, p53 was determined by western blotting which showed an upregulation of p53. Comparatively, the magnetosome–drug conjugates prepared by direct adsorption achieved the best effects on the drug‐loading efficiency and the increased percentage of cancer cell mortality and the upregulation of P53. The proposed research ascertains that magnetosomes could be used as effective nanocarriers in cancer therapy. [ABSTRACT FROM AUTHOR]

The study concerns composite materials based on polymer mixtures of a styrene-acrylic polymer, glycidyl ether, and a 3-aminopropyltriethoxysilane (APTES) compatibilizer. The use of a silane-type compatibilizer improves the compatibility of the components and has been shown to significantly increase the degree of crosslinking of the composition components. In this work, the structural parameters of the polymer network of the composition components depending on the compatibilizer concentration were researched by the method of equilibrium swelling. The optimal concentration of the compatibilizer was found to maximize the degree of crosslinking with a minimal number of active chains. This fact proves that the crosslinking in the composition is complete and the molecule does not contain active sites that have not reacted with the compatibilizer. The swelling kinetics of the polymer composite films proves that with an increase in the degree of crosslinking, the swelling of the polymer films decreases. Polymer films with a low proportion of active chains practically do not swell after the crosslinking process. The article describes a possible mechanism of compatibilization involving 3-aminopropyltriethoxysilane as well as styrene-acrylic and glycidyl ether polymers. The 3-aminopropyltriethoxysilane compatibilizer has active functional groups that are located on opposite sides of the molecule; these are three active hydroxyl groups and one active amino group. Due to the presence of various functional groups, this compatibilizer can bind the polymers and thereby form strong polymer films. This gives grounds to assert that the control of the compatibilizer concentration and the degree of crosslinking of the composition components provide prospects for the creation of polymer films with high physical and mechanical characteristics due to the high interfacial adhesion of the components in the composition. [ABSTRACT FROM AUTHOR]

The development of active and stable catalyst is of significance for hydrogen generation from formic acid. Herein, a novel palladium catalyst with ultrafine metallic nanoparticles anchored on NH 2 -functionalized reduced graphene oxide (NH 2 -rGO) was synthesized by a facile wet chemical reduction process using sodium borohydride as the reducing agent. The TEM and XPS characterization results confirmed the successful functionalization of rGO with 3-aminopropyltriethoxysilane (APTES), which plays a very important role in evenly dispersing ultrafine Pd nanoparticles with a small average size of about 2.3 nm. As a result, the as-prepared Pd/NH 2 -rGO catalyst exhibited excellent activity with a high initial turnover frequency of 767 h−1 and 100% hydrogen selectivity, which was predominant among the currently available pure Pd catalysts towards formic acid dehydrogenation under room temperature. Image 1 • Pd nanoparticles are highly dispersed on NH 2 -functionalized rGO. • Pd/NH 2 -rGO exhibits high activity and 100% selectivity towards dehydrogenation of FA. • NH 2 -functionalization of rGO can improve the hydrophilicity of the catalyst. [ABSTRACT FROM AUTHOR]