标题：Synthesis of Luminescent ZnS Quantum Dots and the Application for Selective Cu2+ Probe in Physiological Solution
作者：Zhao, Jinbo; Wu, Lili; Wu, Youshi; Zou, Ke; Liang, Xiaomeng
作者机构：[Zhao, Jinbo; Wu, Lili; Wu, Youshi; Zou, Ke] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China. 更多
会议名称：9th Chinese International Nanoscience and Technology Symposium
会议日期：NOV 15-19, 2010
关键词：ZnS; quantum dots; probe; luminescence
摘要：A novel water-soluble luminescent ZnS Quantum Dots (QDs) capped by thiourea have been synthesized in aqueous solution. The thiourea-capped ZnS QDs were used as a fluorescence probe to investigate the luminescence response to physiologically important metal cations in tris-HCl buffer solution. The experiments show that the QDs probe were sensitive to only copper ions and insensitive to other physiologically important cations, such as iron, zinc, sodium, potassium, calcium, magnesium, cobalt, and magnesium ions. The detection limit was found to be 7.3 x 10(-7) M and the quenching effect description was attempted using Stern-Volmer-type equation.