High-sensitive electrochemical sensor of Sudan I based on template-directed self-assembly of graphene-ZnSe quantum dots hybrid structure

作者：Wang, Ling; Yang, Ran^*; Li, Jianjun; Qu, Lingbo; Harrington, Peter de B.

来源：Sensors and Actuators B: Chemical , 2015, 215: 181-187.

DOI：10.1016/j.snb.2015.03.034

• Graphene
• Cetyltrimethyl-ammonium bromide
• ZnSe QDs
• Sudan I
• Electrochemical sensor

In this work, a very sensitive electrochemical sensor for Sudan I was established based on nanohybrids of graphene-ZnSe quantum dots. Positively charged cetyltrimethyl-ammonium bromide (CTAB) functionalized graphene was used as a template-directed building block to self-assemble negatively charged ZnSe quantum dots (QDs). The hybrids of ZnSe-CTAB-graphene exhibited strong enrichment effect on Sudan I and gave superior electrocatalytic activity towards the oxidation of Sudan I. Applying differential pulse voltammetry (DPV), the peak current of Sudan I is proportional to its concentration in the range from 0.004 to 2.0 mu M and 2.0 to 15.0 mu M. This report is the first on applying graphene-ZnSe hybrids for electrochemical sensing.

• 出版日期2015-8
• 单位郑州师范学院; 河南工业大学; 郑州大学