Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection

Metallic nanoparticles (NPs) decorated semiconductor nanowires (NWs) heterostructures show significant promise in enhanced optical and opto-electrical properties due to the coupling of surface plasmon to nanowires. Here, we demonstrate a galvanic displacement based strategy to achieve in situ nuclea...

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Main Authors: Chen, Renjie, Li, Dehui, Hu, Hailong, Zhao, Yanyuan, Wang, Ying, Wong, Nancy, Wang, Shijie, Zhang, Yi, Hu, Jun, Shen, Zexiang, Xiong, Qihua
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/99658
http://hdl.handle.net/10220/17234
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-996582020-03-07T12:34:48Z Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection Chen, Renjie Li, Dehui Hu, Hailong Zhao, Yanyuan Wang, Ying Wong, Nancy Wang, Shijie Zhang, Yi Hu, Jun Shen, Zexiang Xiong, Qihua School of Physical and Mathematical Sciences School of Electrical and Electronic Engineering Metallic nanoparticles (NPs) decorated semiconductor nanowires (NWs) heterostructures show significant promise in enhanced optical and opto-electrical properties due to the coupling of surface plasmon to nanowires. Here, we demonstrate a galvanic displacement based strategy to achieve in situ nucleation of Au nanoparticles and then postgrowth into higher order Au nanostructures such as dimers, nanorods, and nanoprisms along the same Si nanowires (SiNWs). The presence of Au nanostructures significantly enhances the optical properties of nanowires. Particularly, a 24 times enhancement of Si Raman scattering signal was achieved with a Au dimer decoration. A Au nanorod aligned in parallel along nanowire strongly enhances the anisotropy of Si Raman scattering, with more than 28 times stronger signal under parallel polarization than that under perpendicular polarization, demonstrating for the first time the surface plasmon enhanced antenna effect. In addition, we demonstrate that surface plasmon enhances photocurrent of SiNW by almost 100%, which is higher than previous reports. Our studies show that SiNWs decorated with metallic nanostructures by in situ galvanic displacement exhibit significant promise toward high efficiency photodetection and light harvesting applications. 2013-11-05T04:02:09Z 2019-12-06T20:09:55Z 2013-11-05T04:02:09Z 2019-12-06T20:09:55Z 2012 2012 Journal Article Chen, R., Li, D., Hu, H., Zhao, Y., Wang, Y., Wong, N., et al. (2012). Tailoring Optical Properties of Silicon Nanowires by Au Nanostructure Decorations: Enhanced Raman Scattering and Photodetection. The Journal of Physical Chemistry C, 116(7), 4416-4422. https://hdl.handle.net/10356/99658 http://hdl.handle.net/10220/17234 10.1021/jp210198u en The journal of physical chemistry C
institution Nanyang Technological University
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country Singapore
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language English
description Metallic nanoparticles (NPs) decorated semiconductor nanowires (NWs) heterostructures show significant promise in enhanced optical and opto-electrical properties due to the coupling of surface plasmon to nanowires. Here, we demonstrate a galvanic displacement based strategy to achieve in situ nucleation of Au nanoparticles and then postgrowth into higher order Au nanostructures such as dimers, nanorods, and nanoprisms along the same Si nanowires (SiNWs). The presence of Au nanostructures significantly enhances the optical properties of nanowires. Particularly, a 24 times enhancement of Si Raman scattering signal was achieved with a Au dimer decoration. A Au nanorod aligned in parallel along nanowire strongly enhances the anisotropy of Si Raman scattering, with more than 28 times stronger signal under parallel polarization than that under perpendicular polarization, demonstrating for the first time the surface plasmon enhanced antenna effect. In addition, we demonstrate that surface plasmon enhances photocurrent of SiNW by almost 100%, which is higher than previous reports. Our studies show that SiNWs decorated with metallic nanostructures by in situ galvanic displacement exhibit significant promise toward high efficiency photodetection and light harvesting applications.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Chen, Renjie
Li, Dehui
Hu, Hailong
Zhao, Yanyuan
Wang, Ying
Wong, Nancy
Wang, Shijie
Zhang, Yi
Hu, Jun
Shen, Zexiang
Xiong, Qihua
format Article
author Chen, Renjie
Li, Dehui
Hu, Hailong
Zhao, Yanyuan
Wang, Ying
Wong, Nancy
Wang, Shijie
Zhang, Yi
Hu, Jun
Shen, Zexiang
Xiong, Qihua
spellingShingle Chen, Renjie
Li, Dehui
Hu, Hailong
Zhao, Yanyuan
Wang, Ying
Wong, Nancy
Wang, Shijie
Zhang, Yi
Hu, Jun
Shen, Zexiang
Xiong, Qihua
Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection
author_sort Chen, Renjie
title Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection
title_short Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection
title_full Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection
title_fullStr Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection
title_full_unstemmed Tailoring optical properties of silicon nanowires by Au nanostructure decorations : enhanced Raman scattering and photodetection
title_sort tailoring optical properties of silicon nanowires by au nanostructure decorations : enhanced raman scattering and photodetection
publishDate 2013
url https://hdl.handle.net/10356/99658
http://hdl.handle.net/10220/17234
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