文献类型：期刊文献

英文题名：Noble metal-comparable SERS enhancement from semiconducting metal oxides by making oxygen vacancies

作者：Cong, Shan[1];Yuan, Yinyin[1,2];Chen, Zhigang[1];Hou, Junyu[3];Yang, Mei[1];Su, Yanli[3];Zhang, Yongyi[1];Li, Liang[2];Li, Qingwen[1];Geng, Fengxia[3];Zhao, Zhigang[1]

机构：[1]Chinese Acad Sci, Suzhou Inst Nano Tech & Nano Bion, Key Lab Nanodevices & Applicat, Suzhou 215123, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[3]Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

年份：2015

卷号：6

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000358860100002)】；

基金：This work was supported by the National Natural Science Foundation of China (51372266), the Natural Science Foundation of Jiangsu Province (BK20130348) and Suzhou Industrial Science and Technology Programm (ZXG201426). F.G. acknowledges support from the National Natural Science Foundation of China (51402204), Thousand Young Talents Program and Jiangsu Specially-Appointed Professor Program. Y.Z. and Q.L. acknowledge the support of the National Natural Science Foundation of China (51202282) and National Basic Research Program by Ministry of Science and Technology (2011CB932600).

语种：英文

摘要：Surface-enhanced Raman spectroscopy (SERS) represents a very powerful tool for the identification of molecular species, but unfortunately it has been essentially restricted to noble metal supports (Au, Ag and Cu). While the application of semiconductor materials as SERS substrate would enormously widen the range of uses for this technique, the detection sensitivity has been much inferior and the achievable SERS enhancement was rather limited, thereby greatly limiting the practical applications. Here we report the employment of non-stoichiometric tungsten oxide nanostructure, sea urchin-like W18O49 nanowire, as the substrate material, to magnify the substrate-analyte molecule interaction, leading to significant magnifications in Raman spectroscopic signature. The enrichment of surface oxygen vacancy could bring additional enhancements. The detection limit concentration was as low as 10(-7) M and the maximum enhancement factor was 3.4 x 10(5), in the rank of the highest sensitivity, to our best knowledge, among semiconducting materials, even comparable to noble metals without 'hot spots'.