文献类型：期刊文献

英文题名：Specific detection of mercury ions based on surface plasmon resonance sensor modified with 1, 6-hexanedithiol

作者：Jiang, Gaocheng[1];Miao, Yongfei[2];Wang, Jianuo[1];Shao, Huilin[1];Chen, Haixin[1];Tao, Pengcheng[1];Wang, Wenhua[3];Yu, Qingxu[1];Peng, Wei[4];Zhou, Xinlei[1]

机构：[1]Dalian Univ Technol, Sch Optoelect Engn & Instrumentat Sci, Dalian 116024, Peoples R China;[2]Air Force Commun NCO Acad, Dept Ground To Air Nav, Dalian, Peoples R China;[3]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[4]Dalian Univ Technol, Sch Phys, Dalian 116024, Peoples R China

年份：2023

卷号：356

外文期刊名：SENSORS AND ACTUATORS A-PHYSICAL

收录：SCI-EXPANDED(收录号：WOS:001040038300001)、、EI(收录号：20231413853652)、Scopus(收录号：2-s2.0-85151556261)、WOS

基金：This work was supported in part by the National Natural Science Foundation of China (Grant Nos. 61727816, 61520106013) and the Fundamental Research Funds for the Central Universities (DUT22YG132) .

语种：英文

外文关键词：SPR; Chemical self-assembly; Transition matrix method; Specific detection

外文摘要：We report an angle-modulation surface plasmon resonance (SPR) sensor, designed with a five-layer Kretschmann prism-coupled configuration, for the specific detection of mercury ions. To simplify the calculation and obtain accurate results efficiently, we employ the transition matrix method instead of traditional Fresnel reflection law system. Due to the specific linkage among sulfhydryl group, Hg2+ and Au, we modify 1, 6-hexanedithiol on sensor chips by chemical self-assembly method. A silver/gold (Ag/Au) composite film is employed and optimized to excite SPR effect for higher sensitively detection. Experimental results show that the modified chip can increase the sensor's sensitivity by two orders of magnitude compared with using unmodified chips. A sensitivity of 1.25 x 10-2 degrees /ppm and a detection limit of 80 ppb for Hg2+ detection has been achieved. In mixed heavy metal ions aqueous medium, solutions containing Hg2+ causes a red shift of 0.79 degrees in the resonance angle, while that is only 0.235 degrees in solutions without Hg2+. The results prove that the 1, 6-hexanedithiol has a good selectivity in detection of Hg2+.