文献类型：期刊文献

英文题名：Large-area fabrication of highly reproducible surface enhanced Raman substrate via a facile double sided tape-assisted transfer approach using hollow Au-Ag alloy nanourchins

作者：Liu, Zhen[1];Cheng, Lin[1];Zhang, Lei[1];Jing, Chao[2];Shi, Xin[2];Yang, Zhongbo[1];Long, Yitao[2];Fang, Jixiang[1]

机构：[1]Xi An Jiao Tong Univ, Sch Sci, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2014

卷号：6

期号：5

起止页码：2567

外文期刊名：NANOSCALE

收录：;EI(收录号：20141017424461);WOS:【SCI-EXPANDED(收录号:WOS:000332127200006)】；

基金：J. X. Fang was supported by National Natural Science Foundation of China (no. 51171139), the Tengfei Talent Project of Xi'an Jiaotong University, the New Century Excellent Talents in University (NCET), Scientific New Star Program in Shaanxi Province (no. 2012KJXX-03), Doctoral Fund of Ministry of Education of China (nos 20110201120039, 20130201110032) and the Fundamental Research Funds for the Central Universities (no. 08142008).

语种：英文

外文关键词：Binary alloys - Silver alloys - Surface scattering - Gold alloys - Raman scattering - Fabrication - Substrates

摘要：Ideally, a SERS substrate should possess super signal amplification, high uniformity and reproducibility. Up to now, an emphasis on reproducibility and uniformity has been crucial to ensure consistent chemical detection sensitivity across the surface of a SERS substrate. Here we demonstrate a simple and facile double sided tape-assisted transfer method to fabricate surface enhanced Raman scattering (SERS) substrates with prominent performance using hollow Au-Ag alloy nanourchins (HAAA-NUs). Such a large area, closely-packed flat film of the HAAA-NUs with a high density of "hot spots" exhibits a high SERS activity and reproducibility, simultaneously. The AFM-correlated nano-Raman and the point by point scanning of SERS signals verify the excellent spatial uniformity and reproducibility with a low relative standard deviation (RSD) less than 15% using crystal violet as probe molecule at the concentrations of 1 x 10(-8) M and 1 x 10(-10) M. The SERS signals of Sudan dye at a 1 x 10(-8) M concentration also show high reproducibility with a low RSD of 13.8%. This facile protocol presented here could lead to a high quality SERS substrate and open tremendous potential for various applications.