Controllable Silver Plating on Silica for Surface-enhanced Raman Scattering

查看全文 作　　者：CHEN [1]Lei;HAN Xiao-[1,2]xia;YANG Jing-[1]xiu;ZHOU [1]Ji;LU Zhi-[1]cheng;SONG [1]Wei;ZHAO [1]Bing;XU Wei-[1]qing;OZAKI [2]Yukihiro

机构地区：[1]State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China,;[2]Department of Chemistry and Research Center for Single Molecule Spectroscopy, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan

出　　处：《Chemical Research in Chinese Universities》索引2011年第27卷第4期,共5页

基　　金：Supported by the National Natural Science Foundation of China(Nos.20873050,20921003,20973074,20903044);the '111' Project(No.B06009);the Key Projects in the National Science & Technology Pillar Program,China(No.2007BAI38B03) 摘　　要：We proposed a facile and rapid method for preparing silica-silver core-shell(SSCS) substrates to use Ag electroless plating on SiO2@Au-seed particles.UV-Vis-NIR absorption spectrometer and SEM were employed to monitor the reaction process of the formation of Ag on the surfaces of silica beads,and the optical resonance of the substrate could shift from visible to NIR region.It has been found that surface-enhanced Raman scattering(SERS) enhancement changes with the electroless plating time and the SSCS substrate with the plating time of 90 s(90SSCS) shows the strongest SERS response under the laser excitation at 514.5 nm.Signals collected over multiple spots and substrate of rhodamine 6G(R6G) resulted in a relative standard deviation(RSD) of 9.75%.The calculated enhancement factor(EF) was approximately 105 '106.SSCS substrate exhibits high SERS performance,which is due to electromagnetic SERS enhancement with additional localization field within closely packed Ag nanoparticles decorated on the SiO2 nanoparticles.And this substrate presents tunable and broad localized surface plasmon resonance(LSPR),so this method may open a new way for SERS studies with other laser excitation. 关键词：表面增强拉曼散射二氧化硅镀银表面等离子体共振纳米SIO2 SERS 可控 SSCS

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Controllable Silver Plating on Silica for Surface-enhanced Raman Scattering

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