• 文献标题:   Preparation of quantum dots CdTe decorated graphene composite for sensitive detection of uric acid and dopamine
  • 文献类型:   Article
  • 作  者:   YU HW, JIANG JH, ZHANG Z, WAN GC, LIU ZY, CHANG D, PAN HZ
  • 作者关键词:   quantum dot, graphene, simultaneous detection, dopamine, uric acid
  • 出版物名称:   ANALYTICAL BIOCHEMISTRY
  • ISSN:   0003-2697 EI 1096-0309
  • 通讯作者地址:   Harbin Med Univ
  • 被引频次:   17
  • DOI:   10.1016/j.ab.2016.12.001
  • 出版年:   2017

▎ 摘  要

The assembly of quantum dots (QDs) in a simply method opens up opportunities to obtain access to the full potential of assembled QDs by virtue of the collective properties of the ensembles. In this study, quantum dots CdTe and graphene (Gr) nanocomposite was constructed for the simultaneous determination of uric acid (UA) and dopamine (DA). The CdTe QDs-Gr nanocomposite was prepared by ultrasonication and was characterized with microscopic techniques. The nanocomposite modified electrode was characterized by cyclicvoltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). Due to the synergistic effects between CdTe QDs and Gr, the fabricated electrode exhibited excellent electrochemical catalytic activities, good biological compatibility and high sensitivity toward the oxidation of UA and DA. Under optimum conditions, in the co -existence system the linear calibration plots for UA and DA were obtained over the range of 3-600 M and 1-500 M with detection limits of 1.0 M and 0.33 M. The fabricated biosensor also exhibits the excellent repeatability, reproducibility, storage stability along with acceptable selectivity. (C) 2016 Published by Elsevier Inc.