Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation

Photogenerated charging properties of single Si nanorods (Si NRs) are investigated by electrostatic force microscopy (EFM) combined with laser irradiation. Under laser irradiation, Si NRs are positively charged. The amount of the charges trapped in single NRs as well as the contact potential differe...

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Autores principales: Wu, Shan, Wu, Zilong, Lin, Dongdong, Zhong, Zhenyang, Jiang, Zuimin, Yang, Xinju
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2014
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4035825/
https://www.ncbi.nlm.nih.gov/pubmed/24940176
http://dx.doi.org/10.1186/1556-276X-9-245
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author Wu, Shan
Wu, Zilong
Lin, Dongdong
Zhong, Zhenyang
Jiang, Zuimin
Yang, Xinju
author_facet Wu, Shan
Wu, Zilong
Lin, Dongdong
Zhong, Zhenyang
Jiang, Zuimin
Yang, Xinju
author_sort Wu, Shan
collection PubMed
description Photogenerated charging properties of single Si nanorods (Si NRs) are investigated by electrostatic force microscopy (EFM) combined with laser irradiation. Under laser irradiation, Si NRs are positively charged. The amount of the charges trapped in single NRs as well as the contact potential difference between the tip and NRs' surface is achieved from an analytical fitting of the phase shift - voltage curve. Both of them significantly vary with the laser intensity and the NR's size and construction. The photogenerated charging and decharging rates are obtained at a timescale of seconds or slower, indicating that the Si NRs are promising candidates in photovoltaic applications.
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spelling pubmed-40358252014-06-17 Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation Wu, Shan Wu, Zilong Lin, Dongdong Zhong, Zhenyang Jiang, Zuimin Yang, Xinju Nanoscale Res Lett Nano Express Photogenerated charging properties of single Si nanorods (Si NRs) are investigated by electrostatic force microscopy (EFM) combined with laser irradiation. Under laser irradiation, Si NRs are positively charged. The amount of the charges trapped in single NRs as well as the contact potential difference between the tip and NRs' surface is achieved from an analytical fitting of the phase shift - voltage curve. Both of them significantly vary with the laser intensity and the NR's size and construction. The photogenerated charging and decharging rates are obtained at a timescale of seconds or slower, indicating that the Si NRs are promising candidates in photovoltaic applications. Springer 2014-05-20 /pmc/articles/PMC4035825/ /pubmed/24940176 http://dx.doi.org/10.1186/1556-276X-9-245 Text en Copyright © 2014 Wu et al.; licensee Springer. http://creativecommons.org/licenses/by/4.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Wu, Shan
Wu, Zilong
Lin, Dongdong
Zhong, Zhenyang
Jiang, Zuimin
Yang, Xinju
Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation
title Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation
title_full Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation
title_fullStr Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation
title_full_unstemmed Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation
title_short Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation
title_sort photogenerated charges and surface potential variations investigated on single si nanorods by electrostatic force microscopy combined with laser irradiation
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4035825/
https://www.ncbi.nlm.nih.gov/pubmed/24940176
http://dx.doi.org/10.1186/1556-276X-9-245
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