Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis | |
Liu, Kai1; Bai, Yaocai2; Zhang, Lei1; Yang, Zhongbo3![]() | |
刊名 | NANO LETTERS
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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. |
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