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Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures

Combining two materials in a nanoscale level can create a composite with new functionalities and improvements in their physical and chemical properties. Here we present a high-throughput approach to produce a nanocomposite consisting of metal nanoparticles and semiconductor oxide nanostructures. Vol...

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Detalles Bibliográficos
Autores principales: Xiao, Bo, Rutherford, Gugu N., Sharma, Amrit P., Pradhan, Sangram K., Bonner, Carl E., Bahoura, Messaoud J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7075916/
https://www.ncbi.nlm.nih.gov/pubmed/32179756
http://dx.doi.org/10.1038/s41598-020-58308-9
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author Xiao, Bo
Rutherford, Gugu N.
Sharma, Amrit P.
Pradhan, Sangram K.
Bonner, Carl E.
Bahoura, Messaoud J.
author_facet Xiao, Bo
Rutherford, Gugu N.
Sharma, Amrit P.
Pradhan, Sangram K.
Bonner, Carl E.
Bahoura, Messaoud J.
author_sort Xiao, Bo
collection PubMed
description Combining two materials in a nanoscale level can create a composite with new functionalities and improvements in their physical and chemical properties. Here we present a high-throughput approach to produce a nanocomposite consisting of metal nanoparticles and semiconductor oxide nanostructures. Volmer-Weber growth, though unfavorable for thin films, promotes nucleation of dense and isolated metal nanoparticles on crystalline oxide nanostructures, resulting in new material properties. We demonstrate such a growth of Au nanoparticles on SnO(2) nanostructures and a remarkable sensitivity of the nanocomposite for detecting traces of analytes in surface enhanced Raman spectroscopy. Au nanoparticles with tunable size enable us to modify surface wettability and convert hydrophilic oxide surfaces into super-hydrophobic with contact angles over 150°. We also find that charge injection through electron beam exposure shows the same effect as photo-induced charge separation, providing an extra Raman enhancement up to an order of magnitude.
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spelling pubmed-70759162020-03-23 Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures Xiao, Bo Rutherford, Gugu N. Sharma, Amrit P. Pradhan, Sangram K. Bonner, Carl E. Bahoura, Messaoud J. Sci Rep Article Combining two materials in a nanoscale level can create a composite with new functionalities and improvements in their physical and chemical properties. Here we present a high-throughput approach to produce a nanocomposite consisting of metal nanoparticles and semiconductor oxide nanostructures. Volmer-Weber growth, though unfavorable for thin films, promotes nucleation of dense and isolated metal nanoparticles on crystalline oxide nanostructures, resulting in new material properties. We demonstrate such a growth of Au nanoparticles on SnO(2) nanostructures and a remarkable sensitivity of the nanocomposite for detecting traces of analytes in surface enhanced Raman spectroscopy. Au nanoparticles with tunable size enable us to modify surface wettability and convert hydrophilic oxide surfaces into super-hydrophobic with contact angles over 150°. We also find that charge injection through electron beam exposure shows the same effect as photo-induced charge separation, providing an extra Raman enhancement up to an order of magnitude. Nature Publishing Group UK 2020-03-16 /pmc/articles/PMC7075916/ /pubmed/32179756 http://dx.doi.org/10.1038/s41598-020-58308-9 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Xiao, Bo
Rutherford, Gugu N.
Sharma, Amrit P.
Pradhan, Sangram K.
Bonner, Carl E.
Bahoura, Messaoud J.
Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures
title Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures
title_full Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures
title_fullStr Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures
title_full_unstemmed Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures
title_short Surface Modification and Charge Injection in a Nanocomposite Of Metal Nanoparticles and Semiconductor Oxide Nanostructures
title_sort surface modification and charge injection in a nanocomposite of metal nanoparticles and semiconductor oxide nanostructures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7075916/
https://www.ncbi.nlm.nih.gov/pubmed/32179756
http://dx.doi.org/10.1038/s41598-020-58308-9
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