罗丹明B修饰金纳米星构建检测Zn^(2+)的荧光传感器  

Rhodamine B Modified Gold Nanostars as Fluorescent Sensor for Dectection of Zinc Ions

作　　者：王凯乾 曾艳 陈荣生 梁峰 WANG Kai-qian;ZENG Yan;CHEN Rong-sheng;LIANG Feng(College of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430081)

机构地区：[1]武汉科技大学化学与化工学院,湖北武汉430081

出　　处：《分析科学学报》2018年第4期549-552,共4页Journal of Analytical Science

基　　金：武汉市科技计划(No.2015060101010069);中科院长春应用化学研究所电分析化学国家重点实验室开放课题(No.SKLEAC201609);生物医学分析化学教育部重点实验室(武汉大学)开放课题(No.ACBM2014001);煤转化与新型炭材料湖北省重点实验室(武汉科技大学)开放课题(No.WKDM2015010)

摘　　要：本工作以小尺寸金纳米颗粒(Au-NPs)为金种,通过种子生长法制得金纳米星(Au-NSs),将Au-NSs与强荧光染料罗丹明B(RhB)混合,发现一定浓度的Au-NSs会导致RhB出现明显的荧光猝灭,且荧光强度的减弱程度与Au-NSs浓度呈良好的线性关系。随后向上述体系中加入一定浓度的Zn^(2+),发现随其浓度的增大,RhB的荧光强度逐渐恢复,二者呈良好的线性关系。通过该方法可以构建一种高效的检测Zn^(2+)的开启式荧光传感器。在优化实验条件下,Zn^(2+)的最低检测浓度可达到0.013mg/L,该方法简便、快速,对Zn^(2+)有较好的选择性。In this study,gold nanostars were prepared by seed growth method using small size gold nanoparticles.The combination of gold nanostars and strong fluorescent dye Rhodamine B caused significant fluorescence quenching phenomenon and quenching rate had a good linear relationship with the concentration of gold nanostars.With the addition of zinc ions to Rhodamine B modified gold nanostars,the fluorescence gradually recovered.The fluorescence recovery rate and concentration of zinc ions showed a good linear relationship.Under the optimal experimental conditions,the minimum detection concentration of zinc ions could reach 0.013 mg/L.So it was an efficient fluorescent sensor for dectection of zinc ions.

关 键 词：金纳米星 罗丹明B 荧光传感器 Zn2+检测 

分 类 号：O657.3[理学—分析化学]