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Self-Reduction of Bimetallic Nanoparticles on Flexible Mxene-Graphene Electrodes for Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid

SSRN, ISSN: 1556-5068
2022
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  • 229
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Usage
    229
    • Abstract Views
      177
    • Downloads
      52
  • Captures
    1
  • Ratings
    • Download Rank
      789,771

Article Description

Three-dimensional (3D) porous laser-scribed graphene (LSG) is potential electrode material for flexible electrochemical sensor own to its high-efficiency preparation and low cost. However, the growth of nanoparticles usually depends on reducers or harsh conditions, which limit the application in flexible biosensor. To solve this drawback, we applied 2D MXene nanosheets to functionalize 3D LSG sheets with a C-O-Ti covalent crosslink and obtain an LSG-MXene hybrid scaffold. We synthesized the shape-controlled Au-Pd bimetallic nanoparticles on the surface of LSG-MXene by a self-reduction process at room temperature in 6 minutes to enhance its catalytic performance. As a proof of concept, the obtained hybrid nanocomposite can assess Ascorbic Acid (AA,10-1600 μM), Dopamine (DA,12-240 μM), and Uric Acid (UA, 8-800 μM). The fabricated sensor exhibited a low detection limit (S/N = 3) of 3 μM AA, 0.13 μM DA, and 1.47 μM UA. Furthermore, the Au-Pd/MXene/LSG was successfully applied to determine AA, DA, and UA in urine samples with satisfactory. Predictable, these outstanding performance sensors have great potential in terms of flexible and wearable electronics.

Bibliographic Details

Ying Wang; Bo Gao; Min Yuan; Jiabing Yu; Zeping Wang; Xianping Chen; Peng Zhao

Elsevier BV

Multidisciplinary; Ti3C2-MXene; ·Laser-scribed graphene; ·Ascorbic acid; ·Dopamine; ·Uric acid; ·Flexible bio-sensor

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