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以磁控贱射的方法在玻璃基底上制作叉指银电极,用丝网印刷技术制备碳纳米管膜。室温下测试吸附甘氨酸前后碳纳米管膜伏安特性和电阻率的变化,发现吸附了甘氨酸后碳纳米管的导电能力增加,且增加的幅度与甘氨酸的浓度有关。实验结果预示:碳纳米管是一种良好的室温下检测甘氨酸的敏感材料。对碳纳米管吸附甘氨酸前后电性能的变化机理进行了初步的探讨。
The method of magnetron sputtering is used to make interdigital silver electrodes on a glass substrate, and the carbon nanotube film is prepared by screen printing technology. The changes of the voltammetric properties and the resistivity of the carbon nanotubes before and after the adsorption of glycine were tested at room temperature. It was found that the conductivity of the carbon nanotubes increased after the adsorption of glycine, and the magnitude of increase was related to the concentration of glycine. The experimental results indicate that carbon nanotubes are a good sensitive material to detect glycine at room temperature. The change mechanism of the electrical properties of carbon nanotubes before and after glycine adsorption was discussed.