Wide range temperature detection with hybrid nanoparticles traced by surface-enhanced Raman scattering

作     者：YIN Jun HE YaGuang LI Wei WU ZongQuan DING YunSheng 

作者机构：Key Laboratory of Advanced Functional Materials and Devices Anhui Province Department of Polymer Material and Engineering School of Chemical Engineering Hefei University of Technology 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2014年第57卷第3期

页      面：417-425页

核心收录：

学科分类：07[理学] 08[工学] 0804[工学-仪器科学与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：supported by the Fundamental Research Funds for the Central Universities 

主　　题：表面增强拉曼散射 温度检测 金纳米粒子 宽范围 混合物 聚(N-异丙基丙烯酰胺) SERS活性 表面等离子体激元 

摘      要：We report on the fabrication of a class of surface-enhanced Raman scattering(SERS)active thermometers,which consists of60 nm gold nanoparticles,encoded with Raman-active dyes,and a layer of thermoresponsive poly(N-isopropylacrylamide)(PNIPAM)brush with different chain lengths.These SERS-active nanoparticles can be optimized to maintain spectrally silent when staying as single particles in dispersion.Increasing temperature in a wide range from 25 to 55°C can reversibly induce the interparticle self-aggregation and turn on the SERS fingerprint signals with up to 58-fold of enhancement by taking advantage of the interparticle plasmonic coupling generated in the process of thermo-induced nanoparticles self-aggregation.Moreover,the most significative point is that these SERS probes could maintain their response to temperature and present all fingerprint signals in the presence of a colored complex.However,the UV-Vis spectra can distinguish the differences faintly and the solution color shows little change in such complex mixture.This proof-of-concept and Raman technique applied here allow for dynamic SERS platform for onsite temperature detection in a wide temperature range and offer unique advantages over other detection schemes.