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2,779 results on '"nanostructured film"'

7. Effect of propolis and polymer content on mechanical, bioadhesive and biological properties of nanostructured film forming platforms for topical drug delivery

Author

Cássia Rosseto, Hélen, de Alcântara Sica de Toledo, Lucas, Said dos Santos, Rafaela, Julia Viana Ferreira, Ana, Vizioli de Castro Hoshino, Lidiane, Cabral Júnior, Bento Pereira, Braga, Gustavo, Girotto, Emerson Marcelo, Nakamura, Tânia Ueda, Baesso, Mauro Luciano, and Bruschi, Marcos Luciano

Published
2024
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8. Development of a Nanostructured Film Containing Palygorskite and Dermaseptin 01 Peptide for Biotechnological Applications

Author

Oliveira, Karla Costa Bezerra Fontenele, Farias, Emanuel Airton de Oliveira, Teixeira, Paulo Ronaldo Sousa, Brandão, Vitor Schwenck, Sábio, Rafael Miguel, de Araújo, Alyne Rodrigues, Eaton, Peter, Bertolino, Luiz Carlos, Bemquerer, Marcelo Porto, da Silva Barud, Hernane, de Souza de Almeida Leite, José Roberto, and Eiras, Carla

Published
2023
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29. An all-solid-state bistable electrochromic device based on an amorphous WO3−x nanostructured film.

Author

Yu, Yang, Shi, Aiyan, Wang, Tongtong, Xu, Fei, and Wang, Tiefeng

Subjects
*ELECTROCHROMIC devices, *BISTABLE devices, *ELECTROCHROMIC windows, *THIN films, *IONIC conductivity, *SOLID electrolytes
Abstract

Bistable electrochromic devices (BECDs) with high energy efficiency have gained extensive attention, due to their great potential for application in the smart windows of buildings and vehicles, as well as in reflective displays. However, the current BECDs are commonly fabricated with liquid or gel electrolytes, which undermine reliability and safety during application. Herein, an all-solid-state BECD with a new structure was designed and developed. It was constructed using an amorphous nanostructured WO3−x film as the electrochromic layer, a Nafion film as the solid electrolyte, and a nanostructured NiO film as the ion storage layer. This device showed ideal performances with excellent bistability (>7 days for the colored state), a fast response (<10 s) and promising dual-band tunability, owing to its stable layered structure and high ionic conductivity. More importantly, applications of this BECD in smart windows and reflective displays have been demonstrated. [ABSTRACT FROM AUTHOR]

Published
2023
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31. Plasmonic Enhanced SERS in Ag/TiO2 Nanostructured Film: An Experimental and Theoretical Study

Author

Chawki Awada

Subjects
plasmonics, SERS, Ag/TiO2, MB, finite element simulation, EM enhancement, Mechanical engineering and machinery, TJ1-1570
Abstract

In this work, we present a new study on the electromagnetic (EM) enhancement properties generated by Ag/TiO2 toward the finger print of methylene blue (MB) molecules deposited on the surface of Ag nanostructures. SERS intensity generated by MB molecules reflects the interaction between the local electric field and their bonds. A power-dependent SERS study in order to reveal the magnitude effect of a local electric field on the vibration behavior of molecular bonds of MB was performed. A theoretical study using finite element (COMSOL Multiphysics) was performed in order to understand the effect of interparticle distance of Ag nanoparticles on the enhancement properties.

Published
2022
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32. Gas Sensor Based on ZnO Nanostructured Film for the Detection of Ethanol Vapor

Author

Mikayel Aleksanyan, Artak Sayunts, Gevorg Shahkhatuni, Zarine Simonyan, Gohar Shahnazaryan, and Vladimir Aroutiounian

Subjects
ethanol sensor, magnetron sputtering, nanograins, sensitivity, thin film, zinc oxide, Biochemistry, QD415-436
Abstract

In this paper, the ZnO target was synthesized by the solid-state reaction method and a nanostructured thin film was deposited by the RF (radio frequency) magnetron sputtering method on a Multi-Sensor-Platform. The obtained ZnO nanostructured film was investigated as the sensing material. Energy-Dispersive X-ray (EDX) analysis indicated the existence of La in the synthesized ZnO material. Scanning Electron Microscope (SEM) images of the film showed the grain sizes in the range of 20–40 nm. Sensor performance characteristics such as a dynamic response, response and recovery times, and ethanol detection range were investigated at 50–300 °C. A sensitivity was observed at extremely low concentrations of ethanol (0.7 ppm). The minimum response and recovery times of the sensor corresponding to 675 ppm ethanol vapor concentration at 250 °C were found to be 14 s and 61 s, respectively. The sensor showed a high response, good selectivity, fast response/recovery behavior, excellent repeatability toward ethanol vapor, and low sensitivity toward humidity. These characteristics enable the use of a ZnO based sensor for ethanol detecting applications.

Published
2022
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33. A Redox-Probe-Free Immunosensor Based on Electrocatalytic Prussian Blue Nanostructured Film One-Step-Prepared for Zika Virus Diagnosis

Author

Lorenna K. B. Santos, Priscila D. Mendonça, LiLian K. S. Assis, Carlos R. Prudêncio, Maria Izabel F. Guedes, Ernesto T. A. Marques, and Rosa Fireman Dutra

Subjects
Zika virus, immunosensor, Prussian blue, envelope protein, point-of-care diagnosis, Biotechnology, TP248.13-248.65
Abstract

The Zika virus (ZIKV) is a great concern for global health due to its high transmission, including disseminating through blood, saliva, urine, semen and vertical transmission. In some cases, ZIKV has been associated with microcephaly, neurological disorders, and Guillain–Barré syndrome. There is no vaccine, and controlling the disease is a challenge, especially with the co-circulation of the Dengue virus, which causes a severe cross-reaction due to the similarity between the two arboviruses. Considering that electrochemical immunosensors are well-established, sensitive, and practical tools for diagnosis, in this study we developed a sensor platform with intrinsic redox activity that facilitates measurement readouts. Prussian blue (PB) has a great ability to form electrocatalytic surfaces, dispensing redox probe solutions in voltammetric measurements. Herein, PB was incorporated into a chitosan–carbon nanotube hybrid, forming a nanocomposite that was drop-casted on a screen-printed electrode (SPE). The immunosensor detected the envelope protein of ZIKV in a linear range of 0.25 to 1.75 µg/mL (n = 8, p < 0.01), with a 0.20 µg/mL limit of detection. The developed immunosensor represents a new method for electrochemical measurements without additional redox probe solutions, and it is feasible for application in point-of-care diagnosis.

Published
2022
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50. High-Strength Nanostructured Film Based on β-Chitin Nanofibrils from Squid Illex argentinus Pens by 2,2,6,6-Tetramethylpiperidin-1-yl Oxyl-Mediated Reaction

Author

Ngesa Ezekiel Mushi, Joakim Engström, Houssine Sehaqui, Qiong Wu, Lengwan Li, and Lars Berglund

Subjects
Squid, Nanocomposite, biology, Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Biomaterial, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, biology.organism_classification, 01 natural sciences, 0104 chemical sciences, Chitosan, chemistry.chemical_compound, Chitin, chemistry, Chemical engineering, Nanofiber, biology.animal, Environmental Chemistry, Biocomposite, 0210 nano-technology, Illex argentinus
Abstract

2,2,6,6-Tetramethylpiperidin-1-yl oxyl (TEMPO)-oxidized beta-chitin nanofibrils (T-ChNF) are novel nanofibrils of high strength and stiffness and can also enhance the adsorption of chitosan in mate ...

Published
2021
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