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]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Guangdong, Peoples R China;[2]Dalian Univ Technol, Sch Optoelect Engn & Instrumentat Sci, Dalian 116024, Peoples R China;[3]Guangdong Inst Anal, China Natl Analyt Ctr, Guangzhou 510070, Guangdong, Peoples R China;[4]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Guangdong, Peoples R China;[5]Guangdong Ocean Univ, Sch Math & Comp Sci, Zhanjiang 524088, Guangdong, Peoples R China

年份：2019

卷号：286

起止页码：59

外文期刊名：SENSORS AND ACTUATORS A-PHYSICAL

收录：SCI-EXPANDED(收录号：WOS:000457951300008)、、WOS

基金：This work was supported by the Science and Technology Planning of Guangdong Province (NO. 2015A030401094), and the National Natural Science Foundation of China (NO. 61727816, NO. 61520106013).

语种：英文

外文关键词：Surface plasmon resonance; Modified-chitosan; Composite film; Reutilization; Copper 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 x 10(-4)/min, and the decline of signal value is less than 1.5% after MCS film adsorbing Cu+2 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. (C) 2018 Elsevier B.V. All rights reserved.