Hierarchical bi-continuous Pt decorated nanoporous Au-Sn alloy on carbon fiber paper for ascorbic acid, dopamine and uric acid simultaneous sensing
By Yang, Han; Zhao, Jie; Qiu, Meijia; Sun, Peng; Han, Dongxue; Niu, Li; Cui, Guofeng
Published in Biosensors and Bioelectronics
2019
Abstract
In this work, Pt nanoparticles modified nanoporous AuSn(Pt@NP-AuSn) alloy on Ni buffered flexible carbon fiber paper (CFP) is fabricated by a simple replacement reaction in which NP-AuSn is fabricated by controllable dealloy of electrodeposited Au-Sn alloy films. The as prepared Pt@NP-AuSn/Ni/CFP possesses hierarchical pore structure, high specific surface area and excellent catalytic activity. Due to the bi-functions of both the large surface area of nanoporous metal and macroporous of carbon fiber paper facilitating mass transfer, the Pt@NP-AuSn/Ni/CFP shows high sensitivity of detecting ascorbic acid (AA), dopamine (DA) and uric acid (UA), with sensitivities of 0.14 ?A ?M?1 cm?2, 15.23 ?A ?M?1 cm?2, 0.28 ?A ?M?1 cm?2 under the concentration ranging from 200 to 2000 ?M, 1
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