文献类型：期刊文献

英文题名：Surface-imprinted core-shell Au nanoparticles for selective detection of bisphenol A based on surface-enhanced Raman scattering

作者：Xue, Jin-Qun[1,2];Li, Da-Wei[1,2];Qu, Lu-Lu[1,2];Long, Yi-Tao[1,2]

机构：[1]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2013

卷号：777

起止页码：57

外文期刊名：ANALYTICA CHIMICA ACTA

收录：;EI(收录号：20131816301296);WOS:【SCI-EXPANDED(收录号:WOS:000318830600007)】；

基金：This research was supported by the National Science Fund for Distinguished Young Scholars (21125522), the Natural Science Foundation of China (21007015), the Fundamental Research Funds for the Central Universities (WB1113005 and WK1214021), and the Open Project Program of the State Key Laboratory of Chemical Engineering (ECUST, SKL-ChE-11C01).

语种：英文

外文关键词：Surface-imprinted; Core-shell; Nanoparticles; Surface-enhanced Raman scattering; Bisphenol A

摘要：Surface-imprinted core-shell Au nanoparticles (AuNPs) were explored for the highly selective detection of bisphenol A (BPA) by surface-enhanced Raman scattering (SERS). A triethoxysilane-template complex (BPA-Si) was synthesized and then utilized to fabricate a molecularly imprinted polymer (MIP) layer on the AuNPs via a sol-gel process. The imprinted BPA molecules were removed by a simple thermal treatment to generated the imprint-removed material, MIP-ir-AuNPs, with the desired recognition sites that could selectively rebind the BPA molecules. The morphological and polymeric characteristics of MIP-ir-AuNPs were investigated by transmission electron microscopy and Fourier-transform infrared spectroscopy. The results demonstrated that the MIP-ir-AuNPs were fabricated with a 2 nm MIP shell layer within which abundant amine groups were generated. The rebinding kinetics study showed that the MIP-ir-AuNPs could reach the equilibrium adsorption for BPA within 10 min owning to the advantage of ultrathin core-shell nanostructure. Moreover, a linear relationship between SERS intensity and the concentration of BPA on the MIP-ir-AuNPs was observed in the range of 0.5-22.8 mg L-1, with a detection limit of 0.12 mg L-1 (blank +/- 3 x s.d.). When applied to SEAS detection, the developed surface-imprinted core-shell MIP-ir-AuNPs could recognize BPA and prevent interference from the structural analogues such as hexafluorobisphenol A (BPAF) and diethylstilbestrol (DES). These results revealed that the proposed method displayed significant potential utility in rapid and selective detection of BPA in real samples. (C) 2013 Elsevier B.V. All rights reserved.