The Fabrication and Detection Performance of High Sensitivity Au-Ag Alloy Nanostar/Paper Flexible Surface Enhanced Raman Spectroscopy Sensors  

作　　者：邓芷盈 WANG Tianyi CAO Shiyi ZHAO Yuan HAN Xiaoyu 张继红 谢俊 DENG Zhiying;WANG Tianyi;CAO Shiyi;ZHAO Yuan;HAN Xiaoyu;ZHANG Jihong;XIE Jun(State Key Laboratory of Silicate Materials for Architectures;Department of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Hainan Institute of Wuhan University of Technology,Sanya 572000,China;International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Hepu Research Center for Silicate Materials Industry Technology,Beihai 536100,China)

机构地区：[1]State Key Laboratory of Silicate Materials for Architectures [2]Department of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [3]Hainan Institute of Wuhan University of Technology,Sanya 572000,China [4]International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [5]Hepu Research Center for Silicate Materials Industry Technology,Beihai 536100,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第2期436-443,共8页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Project of Sanya Yazhou Bay Science and Technology City(No.SCKJ-JYRC-2022-44);the Fundamental Research Funds for the Central Universities(WUT:2023Ⅲ007XXH)。

摘　　要：Au-Ag alloy nanostars based flexible paper surface enhanced Raman spectroscopy sensors were fabricated through simple nanostar coating on regular office paper,and the surface enhanced Raman spectroscopy detection performances were investigated using crystal violet dye analyte.Au-Ag nanostars with sharp tips were synthesized via metal ions reduction method.Transmission electron microscope images,X-Ray diffraction pattern and energy dispersive spectroscopy elemental mapping confirmed the nanostar geometry and Au/Ag components of the nanostructure.UV-Vis-NIR absorption spectrum shows wide local surface plasmon resonance induced optical extinction.In addition,finite-difference time-domain simulation shows much stronger electromagnetic field from nanostars than from sphere nanoparticle.The effect of coating layer on Raman signal intensities was discussed,and optimized 5-layer coating with best Raman signal was obtained.The Au-Ag nanostatrs homogeneously distribute on paper fiber surface.The detection limit is 10-10 M,and the relationship between analyte concentrations and Raman signal intensities shows well linear,for potential quantitative analysis.The calculated enhancement factor is 4.795×10^(6).The flexible paper surface enhanced Raman spectroscopy sensors could be applied for trace chemical and biology molecule detection.

关 键 词：surface-enhanced raman gold-silver alloy nanostars paper-based SERS sensor FLEXIBILITY 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O657.37[理学—分析化学] TP212[理学—化学]