基于凝胶与纳米碳管复合体化学传感器的研究及人工味觉应用

纳米碳管与高聚物复合体由于其独特的电学、光学、机械等性质,成为目前研究的前沿和热点,并呈现出令人振奋的应用潜力。本文介绍了其导电机理,首次制备了两种基于凝胶高聚物与单壁纳米碳管复合体薄膜的化学传感器,并将其应用于实验室开发的电子舌系统,采用阻抗法测量传感器在不同液体中的频率响应,最后对数据用主成分分析法进行模式识别,初步实验结果表明所制备的传感器能较好的区别酸、甜、苦、咸等味道。

Study of Chemical Sensors Based on the Composites of Gel Polymers and Carbon Nanotubes and its Application on Artificial Gustation

Due to their special characteristics of electrics, optics and mechanics, the composites of polymers and carbon nanotubes become the focus of research recently, and show their exciting application potential. The article introduces the electric mechanism of the composites. Two kinds of chemical sensors based on the composites of gel polymers and single wall carbon nanotubes were first fabricated and applied on an electronic tongue system developed in our lab. The responses of sensors in the different liquids were measured using impedance method, and the data were processed by using principle of component analysis (PCA) algorithm. The preliminary results of experiments show the sensors can better discriminate different tastes of acid, sweet, bitter and salty etc.