文献类型：期刊文献

英文题名：Reusable surface plasmon resonance sensor for rapid detection of Cu2+ based on modified-chitosan thin film as an active layer

作者：Wang, Wenhua[1]; Zhou, Xinlei[2]; Wu, Shengxu[3]; Li, Sidong[4]; Wu, Weina[5]; Xiong, Zhengye[1]; Shi, Wenqing[1]; Tian, Xiuyun[1]; Yu, Qingxu[2]

机构：[1] School of Electronic and Information Engineering, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; [2] School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning, 116024, China; [3] China National Analytical Center, Guangdong Institute of Analysis, Guangzhou, Guangdong, 510070, China; [4] School of chemistry and environment, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; [5] School of mathematics and computer science, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China

年份：2019

卷号：286

起止页码：59

外文期刊名：Sensors and Actuators, A: Physical

收录：EI(收录号：20185206304913)、Scopus(收录号：2-s2.0-85059014241)

语种：英文

外文关键词：Nanocomposite films - Copper compounds - Chitosan - Thin films - Copper - Metal ions

外文摘要：In this article, a reusable surface plasmon resonance (SPR) sensor for rapid detection of copper ions (Cu2+), based on optimized silver/gold (Ag/Au) composite film modified by modified-chitosan (MCS) thin film as an active layer, was achieved. We employed a four-layer Kretchmann semi-cylindrical prism configuration and induced a reference beam into the experimental system to improve the sensitivity and stability, and investigated the cross-linking technique of CS solution, the spin coating process of MCS film, the stability of active layer, the rebirth power of SPR sensor, and the detection for trace Cu2+. The rate of swelling or dissolution of MCS film after flushing sensor chip for four times is less than 9×10?4/min, and the decline of signal value is less than 1.5% after MCS film adsorbing Cu2+ and multiple flushing. The elution and capacity rates are above 96% after five times of elution for the sensor by EDTA solution with 0.5mmol/L. Within 1-5ppm, the SPR sensor was found to possess sensitivity of 0.7271ppm?1. The LOD is 18ppb for the trace Cu2+. The present SPR sensor not only could be used in trace monitoring of Cu2+ but also could be extended to other potential applications. ? 2018 Elsevier B.V.