School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, People's Republic of China.
Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, People's Republic of China.
Mikrochim Acta. 2020 Mar 12;187(4):218. doi: 10.1007/s00604-020-4199-6.
A nonenzymatic voltammetric assay for dopamine (DA) was developed based on the combination of three-dimensional graphene (3D Gr) and indium oxide nanosheet arrays (InO NSAs). 3D Gr was prepared by chemical vapor deposition (CVD), and InO NSAs were grown on its surface by hydrothermal synthesis. The results show that 3D Gr maintains a good porous structure (200 μm), and the pore size of InO NSAs is 0.50 μm. Differential pulse voltammetry (DPV) is mainly used to determine the electrochemical properties of InO NSAs/3D Gr. It possesses a sensitivity of 2.69 μA·μM·cm towards DA (5-60 μM) at 0.14 V, and the detection limit (LOD) is 0.10 μM (S/N = 3). The recoveries obtained for spiked samples in the real sample detection is 105 (± 8)%. Graphical abstractSchematic representation of DA sensitive detection by growing InO nanosheets arrays on three-dimentional graphene modified ITO.
基于三维石墨烯（3D Gr）和氧化铟纳米片阵列（InO NSAs）的组合，开发了一种非酶伏安测定多巴胺（DA）的方法。3D Gr 通过化学气相沉积（CVD）制备，InO NSAs 通过水热合成生长在其表面。结果表明，3D Gr 保持良好的多孔结构（200μm），InO NSAs 的孔径为 0.50μm。差分脉冲伏安法（DPV）主要用于确定 InO NSAs/3D Gr 的电化学性质。在 0.14V 时，对 5-60μM 的 DA 具有 2.69μA·μM·cm 的灵敏度，检测限（LOD）为 0.10μM（S/N=3）。在实际样品检测中，对加标样品的回收率为 105（±8）%。
