双金属片
抗坏血酸
检出限
材料科学
石墨烯
纳米复合材料
纳米颗粒
电极
微电极
纳米技术
电化学
化学工程
尿酸
生物传感器
化学
色谱法
金属
冶金
物理化学
生物化学
工程类
食品科学
作者
Ying Wang,Peng Zhao,Bo Gao,Min Yuan,Jiabing Yu,Zeping Wang,Xianping Chen
标识
DOI:10.1016/j.microc.2022.108177
摘要
Three-dimensional (3D) porous laser-scribed graphene (LSG) is a potential electrode material for flexible electrochemical sensors due to its high efficiency and low cost. However, the growth of nanoparticles usually depends on reducers or harsh conditions, which limit the application of flexible biosensors. To resolve this issue, 2D MXene nanosheets were applied to functionalize 3D LSG sheets with a C-O-Ti covalent crosslink and obtain an LSG-MXene hybrid scaffold. The shape-controlled Au-Pd bimetallic nanoparticles were synthesized on the surface of LSG-MXene by a self-reduction process at room temperature for 6 min to enhance its catalytic performance. As a proof of concept, the obtained hybrid nanocomposite was used to assess ascorbic acid (AA, 10–1600 μM), dopamine (DA, 12–240 μM), and uric acid (UA, 8–100, 200–800 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. Predictably, these outstanding performance sensors have great potential in flexible and wearable electronics.
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