Tailoring Optical Properties of Silicon Nanowires by Au Nanostructure Decorations: Enhanced Raman Scattering and Photodetection

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	Tailoring Optical Properties of Silicon Nanowires by Au Nanostructure Decorations: Enhanced Raman Scattering and Photodetection
	Chen, RJ ; Li, DH ; Hu, HL ; Zhao, YY ; Wang, Y（汪颖） ; Wong, N ; Wang, SJ ; Zhang, Y（张益） ; Hu, J（胡钧） ; Shen, ZX ; Xiong, QH
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2012
卷号	116 期号:7
ISSN号	1932-7447
英文摘要	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 nanostmctures 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.
语种	英语
WOS记录号	WOS:000301156500009
公开日期	2013-12-05
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13309]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Chen, RJ,Li, DH,Hu, HL,et al. Tailoring Optical Properties of Silicon Nanowires by Au Nanostructure Decorations: Enhanced Raman Scattering and Photodetection[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012,116(7).
APA	Chen, RJ.,Li, DH.,Hu, HL.,Zhao, YY.,Wang, Y.,...&Xiong, QH.(2012).Tailoring Optical Properties of Silicon Nanowires by Au Nanostructure Decorations: Enhanced Raman Scattering and Photodetection.JOURNAL OF PHYSICAL CHEMISTRY C,116(7).
MLA	Chen, RJ,et al."Tailoring Optical Properties of Silicon Nanowires by Au Nanostructure Decorations: Enhanced Raman Scattering and Photodetection".JOURNAL OF PHYSICAL CHEMISTRY C 116.7(2012).