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Real-time detection of Cu(Ⅱ)with PEDOT:PSS based organic electrochemical transistors

Science China Chemistry 2017年第9期60卷 1205-1211页

作者： Can Xiong Hao Qu Wei Chen Lijun Zhang Longzhen Qiu Lei Zheng Fan Xia School of Food Science and Engineering Hefei University of TechnologyHefei 230009China School of Biological and Medical Engineering Hefei University of TechnologyHefei 230009China Academy of Opto-Electronic Technology Hefei University of TechnologyHefei 230009China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China

Copper is an essential element in the environment and the human body,but at the same time,exposure to high concentrations of Cu^(2+) ions will potentially lead to acute toxicity and various neurodegenerative ***,it is of great significance for the development of highly sensitive and selective strategies for the detection of Cu^(2+) ***,we report a highly efficient poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid)(PEDOT:PSS) based organic electrochemical transistor(OECT)sensor,for real-time Cu^(2+) ions *** detection limit of the OECT device is as low as 100 nM,far beyond the sensitivity required for practical *** detection mechanism may base on the chemical reactivity of Cu^(2+) ions oxiding the PEDOT:PSS in solution both in absence and presence of the base *** OECT devices also exhibit excellent selective response to Cu^(2+)ions rather than other metal ***,we also demonstrate the determination of Cu^(2+) ions in tap water with the OECT Cu^(2+)*** the high sensitivity and selectivity,as well as the real-time and low cost features of our Cu^(2+) OECT sensor,it is ideal for portable and disposable applications for environment monitoring and public health.

关键词： copper detection, organic electrochemical transistors, PEDOT:PSS, real-time, high sensitivity

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Field-effect transistors with multiple channels constructed by carbon nanotubes

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Science China(Technological Sciences) 2005年第6期48卷 669-678页

作者： CHEN Changxin ZHANG Yafei National Key Laboratory of Nano/Micro Fabrication Technology Key Laboratory for Thin Film and Microfabrication of Ministry of Education Institute of Micro and Nano Science and Technology Shanghai Jiaotong University Shanghai 200030 China National Key Laboratory of Nano/Micro Fabrication Technology Key Laboratory for Thin Film and Microfabrication of Ministry of Education Institute of Micro and Nano Science and Technology Shanghai Jiaotong University Shanghai 200030 China

Single-wall carbon nanotubes (SWNTs) pre-decorated with functional molecules are directly aligned in the AC electric field, which makes SWNTs parallelly bridge the source and drain electrodes and act as the multiple conduction channels of the field-effect transistor (FET). The method avoids the mutual tanglement of SWNTs and makes them align between the source and drain electrodes abreast and dispersedly. It is indicated that aligning SWNTs in the high-volatility solvents can decrease the contaminant around the electrodes and has a function to purify the raw SWNTs. The obtained multi-channel FET not only takes on a high transconductance, but also holds the good reliability and stability.

关键词： multi-channel, carbon nanotubes, field-effect transistors, directed alignment, transconductance.

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