| Summary: | 碩士 === 國立雲林科技大學 === 電子與光電工程研究所碩士班 === 101 === In this study, the ZnO nanorod and Au nanoparticle hybrid structure are applied to the sensing electrode for the sensing of glucose. The ZnO nanorod (ZnONR) and Au nanoparticle (AuNP) with a diameter size of 5nm are modified on indium tin oxide (ITO) electrode and fabricated as sensing electrode for glucose biosensor. The ZnONR and AuNP are successfully modified on ITO by chemical bath deposition and self-assembly, and then the ZnO electrode, Au electrode and ZnO-Au electrode are fabricated. The FE-SEM, four point probe, UV-Vis spectrophotometer and cyclic voltammetry (CV) are employed to investigate the characteristics of electrodes, such as surface morphology, sheet resistance, electrochemical properties and glucose catalyst activity. Besides, the LSPR effect of AuNPs are verified by UV-Vis spectrophotometer. In summary, the optimum self-assembly time is 12 hours for AuNPs. With the cyclic voltammtry techniques, the current response of ZnO-Au electrode is decreased from 185.63μA to 20.60μA. Finally, with the glucose added, the catalyst activity of glucose for the AuNP electrode and ZnO-Au electrode are increased to 58.17μA and 22.07μA with an increase percentage of 13.6% and 7.1%, respectively. The results show the chemical deposition and self-assembly method provide an easy, convenient and low cost process for the fabrication of ZnO-Au hybrid electrode at the normal temperature and pressure. The ZnO-Au hybrid electrode has a potential as the high sensitive glucose sensing electrode.
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