Wafer-Scale Double-Layer Stacked Au/Al2O3@Au Nanosphere Structure with Tunable Nanospacing for Surface-Enhanced Raman Scattering

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Wafer-Scale Double-Layer Stacked Au/Al2O3@Au Nanosphere Structure with Tunable Nanospacing for Surface-Enhanced Raman Scattering
	Hu, ZS ; Liu, Z ; Li, L ; Quan, BG ; Li, YL ; Li, JJ ; Gu, CZ
刊名	SMALL
	2014
卷号	10 期号:19 页码:3933
ISSN号	1613-6810
通讯作者	Li, JJ (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Fabricating perfect plasmonic nanostructures has been a major challenge in surface enhanced Raman scattering (SERS) research. Here, a double-layer stacked Au/Al2O3@Au nanosphere structures is designed on the silicon wafer to bring high density, high intensity "hot spots" effect. A simply reproducible high-throughput approach is shown to fabricate feasibly this plasmonic nanostructures by rapid thermal annealing (RTA) and atomic layer deposition process (ALD). The double-layer stacked Au nanospheres construct a three-dimensional plasmonic nanostructure with tunable nanospacing and high-density nanojunctions between adjacent Au nanospheres by ultrathin Al2O3 isolation layer, producing highly strong plasmonic coupling so that the electromagnetic near-field is greatly enhanced to obtain a highly uniform increase of SERS with an enhancement factor (EF) of over 10(7). Both heterogeneous nanosphere group (Au/Al2O3@Ag) and pyramid-shaped arrays structure substrate can help to increase the SERS signals further, with a EF of nearly 10(9). These wafer-scale, high density homo/hetero-metal-nanosphere arrays with tunable nanojunction between adjacent shell-isolated nanospheres have significant implications for ultrasensitive Raman detection, molecular electronics, and nanophotonics.
资助信息	National Natural Science Foundation of China [11174362, 91023041, 91323304, 51272278, 61390503]; Knowledge Innovation Project of CAS [KJCX2-EW-W02]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59740]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Hu, ZS,Liu, Z,Li, L,et al. Wafer-Scale Double-Layer Stacked Au/Al2O3@Au Nanosphere Structure with Tunable Nanospacing for Surface-Enhanced Raman Scattering[J]. SMALL,2014,10(19):3933.
APA	Hu, ZS.,Liu, Z.,Li, L.,Quan, BG.,Li, YL.,...&Gu, CZ.(2014).Wafer-Scale Double-Layer Stacked Au/Al2O3@Au Nanosphere Structure with Tunable Nanospacing for Surface-Enhanced Raman Scattering.SMALL,10(19),3933.
MLA	Hu, ZS,et al."Wafer-Scale Double-Layer Stacked Au/Al2O3@Au Nanosphere Structure with Tunable Nanospacing for Surface-Enhanced Raman Scattering".SMALL 10.19(2014):3933.