• 文献标题:   Self-rolled TiO2 microscroll/graphene composite for electrochemical dopamine sensing
  • 文献类型:   Article
  • 作  者:   MA F, YANG B, ZHANG ZW, KONG JL, HUANG GS, MEI YF
  • 作者关键词:   electrochemical sensor, dopamine sensor, selfrolling, microscroll, 3d nanostructure
  • 出版物名称:   PROGRESS IN NATURAL SCIENCEMATERIALS INTERNATIONAL
  • ISSN:   1002-0071 EI 1745-5391
  • 通讯作者地址:   Fudan Univ
  • 被引频次:   0
  • DOI:   10.1016/j.pnsc.2020.02.008
  • 出版年:   2020

▎ 摘  要

Dopamine is an important neurotransmitter, and nonenzyme electrochemical sensor of dopamine detection based on highly active material is urgently demanded. In this work, an electrochemical sensor with high sensitivity and selectivity based on self-rolled TiO2 microscroll/graphene composite was developed and validated for dopamine sensing. The device exhibited a superior performance for dopamine detection with a detection limit of 4.25 x mol L-1, and in the dopamine concentration range of 0.06-90 mu mol L-1, the oxidation currents increased linearly with the concentration. The remarkable performance enhancement was mainly ascribed to the increased surface area due to the porous surface of the TiO2 nanomembrane and highly conductive graphene therein. In addition, we have demonstrated that the sensor could be effectively used on detecting dopamine concentrations in urine samples. Our work demonstrates that the current microscroll-based device is promising in the field of real-time health monitoring for future human community.