A visual photothermal paper sensor for H_2S recognition through rational modulation LSPR wavelength of plasmonics  

作　　者：Hui Wang Jiabin Cui Anila Arshad Suying Xu Leyu Wang 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering, School of Science, Beijing University of Chemical Technology

出　　处：《Science China Chemistry》2018年第3期368-374,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(21725501,21475007,21675009,21505003);the Fundamental Research Funds for the Central Universities(buctrc201706,buctrc201720)

摘　　要：It is known that the localized surface plasmon resonance(LSPR) wavelength of plasmonics is highly dependent on compositions and geometry of plasmonics as well as the surrounding environments. Here, monodispersed Au@Ag core-shell nanoparticles(Au@Ag NPs) were prepared by carefully optimizing the shell thickness of Au@Ag NPs, and the presence of hydrogen sulfide(H_2 S) would significantly alter the LSPR wavelength. On the basis of this, a photothermal paper sensor for on-site recognition of H_2 S was constructed with a visual detection limit of 12.8 ng/L.It is known that the localized surface plasmon resonance（LSPR） wavelength of plasmonics is highly dependent on compositions and geometry of plasmonics as well as the surrounding environments. Here, monodispersed Au@Ag core-shell nanoparticles（Au@Ag NPs） were prepared by carefully optimizing the shell thickness of Au@Ag NPs, and the presence of hydrogen sulfide（H_2 S） would significantly alter the LSPR wavelength. On the basis of this, a photothermal paper sensor for on-site recognition of H_2 S was constructed with a visual detection limit of 12.8 ng/L.

关 键 词：localized surface plasmon resonance Au@Ag NPs H2S detection photothermal paper sensor 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]