Chen Hsi-Chao, Su Wei-Rong, Yeh Yun-Cheng
Graduate School of Electronic Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan.
Department of Electronic Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan.
ACS Appl Mater Interfaces. 2020 Jul 22;12(29):32905-32914. doi: 10.1021/acsami.0c07943. Epub 2020 Jul 8.
The hybrid electrode of single-wall carbon nanotubes (SWCNTs)/CuO/ZnO nanorods (NRs)/graphene used on the current-response nonenzymatic glucose sensor was investigated herein, regarding the mechanism of the formation of functional channel. The synthesis of the hybrid electrode involved four steps. First, the graphene was grown by chemical vapor deposition (CVD) and then wet-transferred onto indium transparent oxide (ITO) glass. Second, a zinc oxide (ZnO) seed layer was sputtered onto the graphene/ITO glass, and ZnO NRs were gradually grown by the hydrothermal method. Third, the ZnO NRs were clad with cuprous oxide (CuO) by the electrochemical method. Fourth, the SWCNTs were dropped onto the CuO surface, with a Nafion surfactant. X-ray diffraction spectra, scanning electron microscopy spectra, Raman spectra, cyclic voltammograms, and amperometric response diagrams were used to verify the performance of the device. Results showed that sensitivity increased significantly from 11.2 to 289.8 μA mM cm, linear range increased significantly from 0.6 to 11.1 mM, and the coefficient of determination () increased from 0.9766 to 0.9923, all by the addition of the SWCNTs/CuO functional channel mechanism and without graphene. When the graphene was added to the functional channel electrode, sensitivity increased again from 289.8 to 466.1 μA mM cm at low concentrations.
本文研究了用于电流响应型非酶葡萄糖传感器的单壁碳纳米管（SWCNTs）/氧化铜（CuO）/氧化锌（ZnO）纳米棒（NRs）/石墨烯混合电极，探讨了功能通道的形成机制。混合电极的合成包括四个步骤。首先，通过化学气相沉积（CVD）生长石墨烯，然后将其湿法转移到铟透明氧化物（ITO）玻璃上。其次，在石墨烯/ITO玻璃上溅射氧化锌（ZnO）种子层，并通过水热法逐渐生长ZnO纳米棒。第三，通过电化学方法用氧化亚铜（CuO）包覆ZnO纳米棒。第四，将SWCNTs与Nafion表面活性剂一起滴加到CuO表面。利用X射线衍射光谱、扫描电子显微镜光谱、拉曼光谱、循环伏安图和安培响应图来验证该器件的性能。结果表明，通过添加SWCNTs/CuO功能通道机制且不使用石墨烯，灵敏度从11.2显著提高到289.8 μA mM cm，线性范围从0.6显著增加到11.1 mM，测定系数（）从0.9766增加到0.9923。当在功能通道电极中添加石墨烯时，低浓度下灵敏度再次从289.8提高到466.1 μA mM cm。
