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Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis
Liu, Kai1; Bai, Yaocai2; Zhang, Lei1; Yang, Zhongbo3; Fan, Qikui1; Zheng, Haoquan4; Yin, Yadong2; Gao, Chuanbo1
2016-06-01
AbstractColloidal 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
KeywordPorous nanoparticles plasmonic nanoparticles dealloying process hotspots surface-enhanced Raman scattering
DOI10.1021/acs.nanolett.6b00868
Source PublicationNANO LETTERS
ISSN1530-6984
Volume16Issue:6Pages:3675-3681
Corresponding AuthorGao, CB (reprint author), Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Ctr Mat Chem, Xian 710054, Shaanxi, Peoples R China.
Indexed BySCI
WOS IDWOS:000377642700039
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:296[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://124.16.212.251/handle/2HOD01W0/2561
Collection应用物理研究中心
Corresponding AuthorGao, Chuanbo
Affiliation1.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
Recommended Citation
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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