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论文类型：期刊论文

发表时间：2016-11-05

发表刊物：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录刊物：SCIE、EI、Scopus

卷号：508

页面范围：360-365

ISSN号：0927-7757

关键字：Gold nanoparticles; Hg2+; Biosynthesis; Amalgam

摘要：The present study demonstrated the colorimetric response of biogenetic gold nanoparticles (AuNPs) to Hg2+. The colloidal AuNPs were synthesized by the cell-free extracts of yeast strain Magnusiomyces ingens LH-F1, which showed excellent selectivity to Hg2+ over other heavy metal ions, including Ag+, Cd2+, Cu2+, Ni2+, Pb2+ and Zn2+. When the biogenetic AuNPs were interacted with Hg2+ (1-500 mu M), a noticeable blue shift in surface plasmon resonance was observed with no significant changes in solution colour and particle size, and the absorbance ratio (A(525)/A(532)) was linearly correlated with the Hg2+ concentration in the ranges of 1-50 mu M and 100-500 mu M, respectively. High concentrations of Hg2+ (>900 mu M) would aggregate the nanoparticles to form Au-Hg amalgam. (C) 2016 Elsevier B.V. All rights reserved.