中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 合肥物质科学研究院
  3. 中国科学院合肥物质科学研究院
  4. 中科院固体物理研究所
Silver nanocubes/graphene oxide hybrid film on a hydrophobic surface for effective molecule concentration and sensitive SERS detection

文献类型：期刊论文

作者Zhu, Chuhong; Hu, Xiaoye; Wang, Xiujuan1
刊名APPLIED SURFACE SCIENCE
出版日期2019-03-15
卷号470页码:423-429
关键词Surface-enhanced Raman scattering Molecule concentration Silver nanocube Graphene oxide Hydrophobic surface Pesticide detection
ISSN号0169-4332
DOI10.1016/j.apsusc.2018.11.169
通讯作者Wang, Xiujuan(xjwang@issp.ac.cn)
英文摘要Surface-enhanced Raman scattering (SERS) is a promising analytical technique with molecular "fingerprint" characteristic and high sensitivity. To achieve high sensitivity, analytes should be located in or around the so-called SERS "hot spots" that are normally formed in sub-10 nm gaps between the neighboring plasmonic nanostructures. Ordinary SERS substrates generally show low sensitivity to the molecules that have weak affinity to noble-metal surfaces. Here, we fabricate an effective SERS system that can concentrate and adsorb organic pollutants in water for sensitive SERS detection. Such a SERS platform is composed of a thin film of Ag nanocubes/graphene oxide hybrid covered on a small Cu foil, and the Cu foil is placed on a hydrophobic teflon surface. The Ag nanocubes/graphene oxide hybrid film is synthesized by growth of graphene oxide on a Cu foil using electrophoresis and subsequent assembly of Ag nanocubes on the graphene oxide in ethanol via van der Waals interactions. Organic pollutant molecules can be concentrated on the hybrid film by adding a droplet of aqueous analyte solution on the hybrid film and evaporating. Due to the hydrophobic nature of teflon surface, the droplet will shrink onto the hybrid film and realize the concentration of analyte molecules on a SERS platform. There exists large delocalized pi-electron system in the graphene oxide, so the Ag nanocubes/graphene oxide hybrid can effectively adsorb a large number of analyte molecules. As there are plenty of nano-sized gaps between the Ag nanocubes that are densely attached on the graphene oxide sheets, high density SERS hot spots can be formed in the gaps. As a result, the Ag nanocubes/graphene oxide hybrid has shown high SERS activity with an enhancement factor of 3.9 x 10(8) and good signal uniformity (relative standard deviation similar to 12%). It is further demonstrated that the hybrid SERS substrates have exhibited high SERS sensitivity to organic pollutants such as 4-chlorobiphenyl and methyl parathion, showing promising applicability in many fields as diverse as chemical analysis, environmental monitoring, and food safety inspection.
WOS关键词RAMAN-SCATTERING DETECTION ; METHYL-PARATHION ; GRAPHENE ; NANOPARTICLES ; FABRICATION
资助项目Natural Science Foundation of China[21671192] ; Natural Science Foundation of China[21577146] ; Natural Science Foundation of China[51671186] ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar[1808085J12] ; CASHIPS Director's Fund[YZJJ201701]
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
WOS记录号WOS:000454997100049
出版者ELSEVIER SCIENCE BV
资助机构Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; Anhui Provincial Natural Science Foundation for Distinguished Young Scholar ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund ; CASHIPS Director's Fund
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/41169]  
专题合肥物质科学研究院_中科院固体物理研究所
通讯作者Wang, Xiujuan
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, Chuhong,Hu, Xiaoye,Wang, Xiujuan. Silver nanocubes/graphene oxide hybrid film on a hydrophobic surface for effective molecule concentration and sensitive SERS detection[J]. APPLIED SURFACE SCIENCE,2019,470:423-429.
APA Zhu, Chuhong,Hu, Xiaoye,&Wang, Xiujuan.(2019).Silver nanocubes/graphene oxide hybrid film on a hydrophobic surface for effective molecule concentration and sensitive SERS detection.APPLIED SURFACE SCIENCE,470,423-429.
MLA Zhu, Chuhong,et al."Silver nanocubes/graphene oxide hybrid film on a hydrophobic surface for effective molecule concentration and sensitive SERS detection".APPLIED SURFACE SCIENCE 470(2019):423-429.

入库方式： OAI收割

来源：合肥物质科学研究院

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。