Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis

doi:10.1021/acs.nanolett.6b00868

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 太赫兹技术研究中心

	Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis
	Liu, Kai 1; Bai, Yaocai 2; Zhang, Lei 1; Yang, Zhongbo3 ; Fan, Qikui 1; Zheng, Haoquan 4; Yin, Yadong 2; Gao, Chuanbo 1
刊名	NANO LETTERS
	2016-06-01
卷号	16 期号:6 页码:3675-3681
关键词	Porous nanoparticles plasmonic nanoparticles dealloying process hotspots surface-enhanced Raman scattering
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.6b00868
通讯作者	Gao, CB (reprint author), Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Ctr Mat Chem, Xian 710054, Shaanxi, Peoples R China.
英文摘要	Colloidal plasmonic metal nanoparticles have enabled surface-enhanced Raman scattering (SERS) for a variety of analytical applications. While great efforts have been made to create hotspots for amplifying Raman signals, it remains a great challenge to ensure their high density and accessibility for improved sensitivity of the analysis. Here we report a dealloying process for the fabrication of porous Au-Ag alloy nanoparticles containing abundant inherent hotspots, which were encased in ultrathin hollow silica shells so that the need of conventional organic capping ligands for stabilization is eliminated, producing colloidal plasmonic nanoparticles with clean surface and thus high accessibility of the hotspots. As a result, these novel nanostructures show excellent SERS activity with an enhancement factor of similar to 1.3 x 10(7) on a single particle basis (off-resonant condition), promising high applicability in many SERS-based analytical and biomedical applications
资助项目	National Natural Science Foundation of China[21301138] ; Xi'an Jiaotong University ; U.S. National Science Foundation[CHE-1308587] ; Fundamental & Advanced Research Project of Chongqing, China[cstc2013jcyjC00001]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000377642700039
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/2561]
专题	太赫兹技术研究中心
通讯作者	Gao, Chuanbo
作者单位	1.Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Ctr Mat Chem, Xian 710054, Shaanxi, Peoples R China 2.Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Multiscale Mfg Technol, Chongqing 400714, Peoples R China 4.Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
推荐引用方式 GB/T 7714	Liu, Kai,Bai, Yaocai,Zhang, Lei,et al. Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis[J]. NANO LETTERS,2016,16(6):3675-3681.
APA	Liu, Kai.,Bai, Yaocai.,Zhang, Lei.,Yang, Zhongbo.,Fan, Qikui.,...&Gao, Chuanbo.(2016).Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis.NANO LETTERS,16(6),3675-3681.
MLA	Liu, Kai,et al."Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis".NANO LETTERS 16.6(2016):3675-3681.