14 results on '"Yuanchun Zhao"'
Search Results
2. Novel plasma-engineered MoS2 nanosheets for superior lithium-ion batteries
- Author
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Chuang Yu, Yanyan Liu, Hongqiang Wang, Yuanchun Zhao, Tongde Shen, Long Zhang, Hong Zeng, and Xinlin Yan
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Materials science ,Mechanical Engineering ,Doping ,Heteroatom ,Metals and Alloys ,chemistry.chemical_element ,Nanotechnology ,02 engineering and technology ,Plasma ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Ion ,Anode ,chemistry ,Mechanics of Materials ,Oxygen plasma ,Materials Chemistry ,Lithium ,0210 nano-technology - Abstract
It is a highly relevant topic concerning how to improve the electrochemical performance of anode materials for the next generation lithium-ion batteries (LIBs). Herein, for the first time, we report a facile and controllable approach to modify MoS2 nanosheets, a typical 2D material, as an anode material for advanced LIBs via oxygen plasma engineering. An oxygen plasma treatment not only generates vacancies/defects but also incorporates heteroatom doping to form Mo–O–C bonds. This unique hybrid specialty enables the oxygen-plasma-treated MoS2 to achieve superior electrochemical performance with high reversible capacities, a long-term cycle life, and good rate capabilities. The plasma-assisted modification is believed to be applicable for other 2D materials as an efficient anode for energy storages.
- Published
- 2019
3. A P/N type silicon semiconductor loaded with silver nanoparticles used as a SERS substrate to selectively drive the coupling reaction induced by surface plasmons
- Author
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Lixin Xia, Peng Song, Liping Ma, Yuanchun Zhao, and Qijia Zhang
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Materials science ,Silicon ,Band gap ,Physics::Optics ,chemistry.chemical_element ,Bioengineering ,02 engineering and technology ,Substrate (electronics) ,010402 general chemistry ,01 natural sciences ,Silver nanoparticle ,General Materials Science ,Physics::Chemical Physics ,Surface plasmon resonance ,Plasmon ,business.industry ,Surface plasmon ,technology, industry, and agriculture ,General Engineering ,General Chemistry ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Semiconductor ,chemistry ,Optoelectronics ,0210 nano-technology ,business - Abstract
Semiconductor materials are favoured in the field of photocatalysis due to their unique optoelectronic properties. When a semiconductor is excited by external energy, electrons will transition through the band gap, providing electrons or holes for the reaction. This is similar to the chemical enhancement mode of a catalytic reaction initiated by the rough noble metal on the surface excited by plasmon resonance. In this study, different types of semiconductor silicon loaded with silver nanoparticles were used as SERS substrates. SERS detection of p-aminothiophenol (PATP) and p-nitrothiophenol (PNTP) probe molecules was performed using typical surface plasmon-driven coupling reactions, and the mechanism of optical drive charge transfer in semiconductor–metal–molecular systems was investigated. Scanning electron microscopy and plasmon luminescence spectroscopy were used to characterize the silver deposited on the substrate surface. Mapping technology and electrochemistry were used to characterize the photocatalytic reaction of the probe molecules. This study proposed a mechanism for the coupling reaction of “hot electrons” and “hot holes” on the surface of plasmon-driven molecules and provides a method for preparing a stable SERS substrate.
- Published
- 2020
4. Plasmon-driven surface catalytic reaction of 4-ethynylaniline in a liquid environment
- Author
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Peng Song, Shiwei Wu, Jing Wang, Yu Liu, Lixin Xia, Caiqing Ma, Yuanchun Zhao, and Yanqiu Yang
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Materials science ,General Chemical Engineering ,Surface plasmon ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,01 natural sciences ,Coupling reaction ,Silver nanoparticle ,0104 chemical sciences ,Catalysis ,Metal ,symbols.namesake ,visual_art ,visual_art.visual_art_medium ,symbols ,Photocatalysis ,0210 nano-technology ,Raman spectroscopy ,Plasmon - Abstract
There is much evidence that surface plasmon photocatalytic reactions can occur on organic molecules on metal surfaces. In this paper, we focus on the photocatalytic reaction of 4-ethynylaniline (PEAN) on silver nanoparticles (Ag NPs) in a liquid environment by surface-enhanced Raman spectroscopy (SERS). Our experiments used SERS to characterize p,p′-diynylazobenzene produced from PEAN via a selective catalytic coupling reaction on Ag NPs. This discovery not only achieved the expected results but also broadens the known plasmon-driven surface catalytic reaction system. In our work, we also regulated the photocatalytic coupling reaction conditions of PEAN on Ag NPs by laser power-dependent and time-dependent SERS spectra.
- Published
- 2018
5. Tuning the Photocatalytic Activity of Graphitic Carbon Nitride by Plasma-Based Surface Modification
- Author
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Dongli Yu, Huiyun Guo, Xueqiang Ji, Lan Yu, Haiquan Zhang, Yuanchun Zhao, Jiajie Wu, Xiaohong Yuan, and Hannian Wang
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Materials science ,Inorganic chemistry ,Graphitic carbon nitride ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Oxygen ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Specific surface area ,Rhodamine B ,Photocatalysis ,Surface modification ,General Materials Science ,Particle size ,0210 nano-technology ,Photodegradation - Abstract
In this study, we demonstrate that plasma treatment can be a facile and environmentally friendly approach to perform surface modification of graphitic carbon nitride (g-CN), leading to a remarkable modulation on its photocatalytic activity. The bulk properties of g-CN, including the particle size, structure, composition, and electronic band structures, have no changes after being treated by oxygen or nitrogen plasma; however, its surface composition and specific surface area exhibit remarkable differences corresponding to an oxygen functionalization induced by the plasma post-treatment. The introduced oxygen functional groups play a key role in reducing the recombination rate of the photoexcited charge carries. As a consequence, the oxygen-plasma-treated sample shows a much superior photocatalytic activity, which is about 4.2 times higher than that of the pristine g-CN for the degradation of rhodamine B (RhB) under visible light irradiation, while the activity of nitrogen-plasma-treated sample exhibits a slight decrease. Furthermore, both of the plasma-treated samples are found to possess impressive photocatalytic stabilities. Our results suggest that plasma treatment could be a conventional strategy to perform surface modification of g-CN in forms of both powders and thin films, which holds broad interest not only for developing g-CN-based high-performance photocatalysts but also for constructing photoelectrochemical cells and photoelectronic devices with improved energy conversion efficiencies.
- Published
- 2017
6. Effect of temperature on structure and corrosion resistance for electroless NiWP coating
- Author
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Kazuhiro Matsugi, Yuanchun Zhao, H L Luo, You Fei, Jinku Yu, Z Z Xiao, Li Cailing, Meiqi Yu, Z F Xu, and Qi Qiao
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010302 applied physics ,Materials science ,Metallurgy ,02 engineering and technology ,engineering.material ,021001 nanoscience & nanotechnology ,01 natural sciences ,Corrosion ,Coating ,Mechanics of Materials ,0103 physical sciences ,engineering ,General Materials Science ,Magnesium alloy ,Alloy coating ,0210 nano-technology ,Polarization (electrochemistry) - Abstract
The effect of plating temperatures between 60 and 90°C on structure and corrosion resistance for electroless NiWP coatings on AZ91D magnesium alloy substrate was investigated. Results show that temperature has a significant influence on the surface morphology and corrosion resistance of the NiWP alloy coating. An increase in temperature will lead to an increase in coating thickness and form a more uniform and dense NiWP coatings. Moreover, cracks were observed by SEM in coating surface and interface at the plating temperature of 90°C. Coating corrosion resistance is highly dependent on temperature according to polarization curves. The optimum temperature is found to be 80 ∘ C and the possible reasons of corrosion resistance for NiWP coating have been discussed.
- Published
- 2016
7. Effect of the bond polarity on interlayer interactions in B–C–N layered materials: A dispersion-corrected density functional study
- Author
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Julong He, Xiaoguang Luo, Kun Luo, Nan Liu, Dongli Yu, Yuanchun Zhao, and Xiaohong Yuan
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Materials science ,Graphene ,Chemical polarity ,Binding energy ,Stacking ,Charge density ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,Crystallography ,Mechanics of Materials ,law ,Covalent bond ,Monolayer ,Materials Chemistry ,Polar ,General Materials Science ,0210 nano-technology - Abstract
The interlayer interactions in nonpolar graphite and other B C N layered materials involving polar covalent bonds (h-BN, g-C3N4, graphite-like BC3 and BC2N) have been investigated by dispersion-corrected density functional calculations. Lattice parameters, bulk moduli and interlayer binding energies of these layered materials have been calculated using different dispersion correction schemes for comparison. Charge density difference plots have also been presented to elucidate the charge transfer behaviors along the nonpolar/polar covalent bonds as well as in the interlayer region. At first, graphite and h-BN were examined as benchmarks; the former contains planar graphene layers regardless of the interlayer binding, while the monolayers in the latter exhibit an asymmetric charge distribution along the B N polar bonds, leading to a slightly puckered feature induced by the interlayer interaction. Similar geometric deviations have also been observed in other layered structures involving C N and/or B C polar bonds, but with distinct characteristics directly related to their specific interlayer stacking situations. By contrast, all of the isolated monolayers free from interlayer binding show a pristine planar feature in despite of the polar covalent bonds involved. Our theoretical findings further address the necessity of considering the electron-density variations induced by specific bonding environments in polar B C N layered materials, which can be properly described by the Tkatchenko-Scheffler correction.
- Published
- 2020
8. Cluster-model DFT simulations of the infrared spectra of triazine-based molecular crystals
- Author
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Nan Liu, Xiaohong Yuan, Chao Liu, Julong He, Yuanchun Zhao, Kun Luo, Xueqiang Ji, Guangjun Tian, and Dongli Yu
- Subjects
Materials science ,Intermolecular force ,General Physics and Astronomy ,Infrared spectroscopy ,Context (language use) ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Crystal ,Chemical physics ,Molecular vibration ,Cluster (physics) ,Molecule ,Density functional theory ,Physical and Theoretical Chemistry ,0210 nano-technology - Abstract
Understanding the intermolecular interactions in the context of crystal packing is of fundamental significance in molecular materials science. Infrared (IR) spectroscopy can provide complementary structural information; however, it still remains a great challenge to accurately predict the molecular IR vibrations in the crystalline phase. Here we report a cluster-model approach to simulate the IR spectra of triazine-based molecular crystals via density functional theory (DFT) calculations. In the properly designed cluster models, the molecular IR vibrations are expressed by a representative unit, while the nearest-neighbouring molecules are treated as a “frozen shell” to mimic the surrounding crystallographic environments. Much smaller clusters can be built by considering the crystallographic equivalence in the unit cell, which are able to perform DFT calculations on more complicated crystal structures with endurable computational costs. The simulated spectra show excellent consistencies with the experimental ones, particularly providing an in-depth understanding of the vibrational modes closely related to hydrogen bonding. Most importantly, the selectively built clusters based on the crystallographically independent molecules in the unit cell allow us to perform specific IR-spectral simulations, by which their distinct hydrogen-bonding environments have been clearly revealed for the first time.
- Published
- 2018
9. Stacking sequences of black phosphorous allotropes and the corresponding few-layer phosphorenes
- Author
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Feng Lu, Yuanchun Zhao, Tiege Zhou, Xiaoguang Luo, and Ying Wei
- Subjects
Materials science ,Band gap ,Relaxation (NMR) ,Stacking ,General Physics and Astronomy ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Molecular physics ,Metal ,symbols.namesake ,Phosphorene ,chemistry.chemical_compound ,chemistry ,visual_art ,0103 physical sciences ,symbols ,visual_art.visual_art_medium ,Direct and indirect band gaps ,Physical and Theoretical Chemistry ,van der Waals force ,010306 general physics ,0210 nano-technology ,Electronic band structure - Abstract
Possible bulk black phosphorus (BP) allotropes are constructed based on single-layer BP with various stacking sequences. Our stacking algorithm shows that there are eight possible allotropes with two stacking layers in their unit cells possessing relatively high symmetries, and six of them are retained after structural relaxation using a van der Waals correction of optB88-vdW. The AF, AG, and AH bulk structures are presented for the first time. The structural relationship of these configurations has been explained via an interlayer slipping process. The total energy of the AF allotrope is closest to the most stable bulk BP structure (AB stacking) among all explored 2-layer stacked bulk structures. The calculated band structure of the AF allotrope using HSE06 shows a direct band gap of 0.48 eV with anisotropic electronic structures. We also presented six possible BP allotropes with three stacking layers in their unit cells. The newly reported AAF and ABC stacked structures show semiconducting and metallic features, respectively. After the bulk structures were explored, we further built the corresponding few-layer phosphorene structures and investigated their electronic properties. The results show that all the few-layer phosphorenes show semiconducting features. The AE, AAE, and AEA phosphorenes have indirect band gaps while the other explored phosphorenes possess direct band gaps located at the Γ point.
- Published
- 2018
10. Combinatorial Vibration-Mode Assignment for the FTIR Spectrum of Crystalline Melamine: A Strategic Approach toward Theoretical IR Vibrational Calculations of Triazine-Based Compounds
- Author
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Yuanchun Zhao, Kun Luo, Julong He, Xiaohong Yuan, Dongli Yu, and Keqin Zhang
- Subjects
Infrared ,Intermolecular force ,Graphitic carbon nitride ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,symbols.namesake ,Fourier transform ,chemistry ,Computational chemistry ,Cluster (physics) ,symbols ,Physical chemistry ,Physical and Theoretical Chemistry ,Fourier transform infrared spectroscopy ,0210 nano-technology ,Spectroscopy ,Triazine - Abstract
Although polymeric graphitic carbon nitride (g-C3N4) has been widely studied as metal-free photocatalyst, the description of its structure still remains a great challenge. Fourier transform infrared (FTIR) spectroscopy can provide complementary structural information. In this paper, we reconsider the representative crystalline melamine and develop a strategic approach to theoretically calculate the IR vibrations of this triazine-based nitrogen-rich system. IR calculations were based on three different models: a single molecule, a 4-molecule unit cell, and a 32-molecule cluster, respectively. By this comparative study the contribution of the intermolecular weak interactions were elucidated in detail. An accurate and visualized description on the experimental FTIR spectrum has been further presented by a combinatorial vibration-mode assignment based on the calculated potential energy distribution of the 32-molecule cluster. The theoretical approach reported in this study opens the way to the facile and accurate assignment for IR vibrational modes of other complex triazine-based compounds, such as g-C3N4.
- Published
- 2016
11. Luminescence Enhancement of Pyrene/Dispersant Nanoarrays Driven by the Nanoscale Spatial Effect on Mixing
- Author
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Rong-Ming Ho, Florian Massuyeau, Chain-Shu Hsu, Ming-Chia Li, Jean-Luc Duvail, Kuan Hsin Lo, Yuanchun Zhao, Serge Lefrant, Wei-Tsung Chuang, Department of Chemical Engineering Taiwan (DCET - NTHU), National Tsing Hua University [Hsinchu] (NTHU), Frontier Research Center on Fundamental and Applied Sciences of Matters Taiwan (FRCFASM), Frontier Research Center on Fundamental and Applied Sciences of Matters, Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), National Synchrotron Radiation Research Center Taiwan (NSRRC), National Synchrotron Radiation Research Center, Department of Applied Chemistry (NCTU) (NCTU), and National Chiao Tung University (NCTU)
- Subjects
Luminescence ,Materials science ,Luminescent Measurements ,Polymers ,Surface Properties ,Infrared spectroscopy ,Nanotechnology ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Dispersant ,Scanning probe microscopy ,Electrochemistry ,General Materials Science ,Particle Size ,Spectroscopy ,Pyrenes ,Nanoporous ,Surfaces and Interfaces ,Chromophore ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Nanostructures ,0104 chemical sciences ,Attenuated total reflection ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,0210 nano-technology ,Porosity - Abstract
International audience; This work presents a simple method to generate ordered chromophore/dispersant nanoarrays through a pore-filling process for a nanoporous polymer template to enhance chromophore luminescence. Fluorescence results combining with the morphological evolution examined by scanning probe microscopy reveal that the enhanced luminescence intensity reaches the maximum intensity as the nanopores of the template are completely filled by the chromophore/dispersant mixture. The variation is attributed to nanoscale spatial effect on the enhanced mixing efficiency of chromophore and dispersant, that is, the alleviation of self-quenching problem, as evidenced by the results of attenuated total reflection Fourier transform IR spectroscopy combining with grazing incident wide-angle X-ray diffraction. The enhanced luminescence of the chromophore/dispersant nanoarrays driven by the nanoscale spatial effect is highly promising for use in designing luminescent nanodevices.
- Published
- 2013
12. Improved photoconductive properties of composite nanofibers based on aligned conjugated polymer and single-walled carbon nanotubes
- Author
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Jean-Luc Duvail, Yuanchun Zhao, Serge Lefrant, Florian Massuyeau, Frédéric Geschier, Christopher P. Ewels, Eric Gautron, Abdel-Aziz El Mel, Jany Wéry, Eric Faulques, Chain-Shu Hsu, Jean Yves Mevellec, Abu Yaya, Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Department of Applied Chemistry (NCTU) (NCTU), and National Chiao Tung University (NCTU)
- Subjects
conjugated polymer ,Materials science ,Nanotechnology ,02 engineering and technology ,Carbon nanotube ,Conjugated system ,010402 general chemistry ,01 natural sciences ,law.invention ,transport properties ,law ,photoconductivity ,General Materials Science ,Electrical and Electronic Engineering ,Photocurrent ,chemistry.chemical_classification ,Nanocomposite ,Photoconductivity ,single-walled carbon nanotube (SWNT) ,Polymer ,Tubular nanocomposites ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,chemistry ,Nanofiber ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,Density functional theory ,0210 nano-technology ,density functional theory (DFT) calculation - Abstract
International audience; We successfully address the challenge of aligning single-walled carbon nanotubes (SWNTs) and conjugated polymer chains in composite nanofibers for enhancing their opto-electrical properties. A pore-filling template strategy has been developed to prepare such nanocomposites from SWNTs and poly(para-phenylene vinylene) (PPV) chains, with both species well-oriented aligned along the pore axis. Addition of the SWNTs leads to a remarkable increase in photocurrent of four orders of magnitude as compared to equivalent pristine PPV nanofibers. Further analysis indicates that the strong photocurrent enhancement is not simply an effect of alignment, but additionally benefits from alignment-enhanced interaction of polymer chains with SWNTs, as supported by density functional theory (DFT) calculations.
- Published
- 2013
13. Induced Chain Alignment of Conjugated Polymers Within Nanoporous Template
- Author
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Rong-Ming Ho, Serge Lefrant, Yung Ming Liao, Florian Massuyeau, Chain-Shu Hsu, Jean-Luc Duvail, Kuan Hsin Lo, Yuanchun Zhao, Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), and Université de Nantes (UN)-Université de Nantes (UN)
- Subjects
Materials science ,Nanostructure ,Photoluminescence ,Nanotechnology ,02 engineering and technology ,Conjugated system ,010402 general chemistry ,01 natural sciences ,Biomaterials ,Scanning probe microscopy ,nanostructures ,Electrochemistry ,conjugated polymers ,Fourier transform infrared spectroscopy ,chemistry.chemical_classification ,Nanoporous ,nanoporous materials ,Polymer ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Nanopore ,block copolymers ,chemistry ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,photoluminescence ,0210 nano-technology - Abstract
International audience; This work presents a simple method to generate ordered conjugated polymer nanoarrays through a pore-filling process for nanoporous polymer templates so as to enhance the efficiency of photoluminescence (PL). PL results combined with the morphological evolution examined by scanning probe microscopy revealed that the enhanced PL reaches maximum intensity as the template pores are completely filled by conjugated polymers. Polarized PL spectroscopy and grazing incidence Fourier transform infrared spectroscopy were used to determine the chain orientation of templated conjugated polymer; the spectroscopic results indicate a parallel chain orientation along the cylindrical direction of nanopores. The induced alignment of the polymer chains is attributed to a nanoscale spatial effect that increases the PL intensity and the lifetime of the conjugated polymer. The enhanced luminescence of nanostructured conjugated polymers is highly promising for use in designing luminescent nanodevices.
- Published
- 2011
14. Phase separation of a binary liquid in anodic aluminium oxide templates : a structural study by small angle neutron scattering
- Author
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Ronan Lefort, Jean-Luc Duvail, T. Corre, Yuanchun Zhao, Denis Morineau, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), and Université de Nantes (UN)-Université de Nantes (UN)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Materials science ,Nanostructure ,Physics::Instrumentation and Detectors ,Biophysics ,Analytical chemistry ,02 engineering and technology ,Surfaces and Interfaces ,General Chemistry ,Neutron scattering ,021001 nanoscience & nanotechnology ,01 natural sciences ,Small-angle neutron scattering ,[SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics ,chemistry.chemical_compound ,chemistry ,Critical point (thermodynamics) ,Phase (matter) ,0103 physical sciences ,Aluminium oxide ,General Materials Science ,Soft matter ,Biological small-angle scattering ,010306 general physics ,0210 nano-technology ,Biotechnology - Abstract
International audience; The radial nanostructure of the binary liquid triethylamine/water confined in 60 nm diameter independent cylindrical pores of anodic aluminium oxide membranes is studied by small angle neutron scattering. It is shown that composition inhomogeneities are present in the confined mixtures well below the bulk critical point. An analysis of the neutron scattering form factor reveals the existence of an adsorbed water layer of a few nanometers at the liquid/alumina interface, coexisting with a TEA-rich phase in the core.
- Published
- 2011
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