標題: Functionalized Carbon Nanotube Thin Films as the pH Sensing Membranes of Extended-Gate Field-Effect Transistors on the Flexible Substrates
作者: Tsai, Wan-Lin
Huang, Bai-Tao
Wang, Kuang-Yu
Huang, Yu-Chih
Yang, Po-Yu
Cheng, Huang-Chung
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Biosensors;carbon nanotube (CNT);extended-gate field-effect transistors (EGFETs);flexible substrates
公開日期: 1-Jul-2014
摘要: The oxygen-plasma-functionalized carbon nanotube thin films on the flexible substrates as the pH sensing membranes of extended-gate field-effect transistors are proposed for the first time. The carbon nanotubes are ultrasonically sprayed onto the polyimide substrates followed by an oxygen-plasma functionalization. Such oxygen-plasma-treated carbon nanotube thin films (CNTFs) exhibit superior pH sensing characteristics with the sensitivity of 55.7 mV/pH and voltage linearity of 0.9996 in a wide sensing range of pH 1-13. Moreover, the excellent flexibility of carbon nanotube is also demonstrated and the oxygen-plasma-treated CNTFs still maintain the sensitivity of 53.6 mV/pH and voltage linearity of 0.9943 even after five-cycle bending test. These results reveal that the oxygen-plasma-treated CNTFs have great potentials in the practically disposal and wearable biosensor applications.
URI: http://dx.doi.org/10.1109/TNANO.2014.2318710
http://hdl.handle.net/11536/24889
ISSN: 1536-125X
DOI: 10.1109/TNANO.2014.2318710
期刊: IEEE TRANSACTIONS ON NANOTECHNOLOGY
Volume: 13
Issue: 4
起始頁: 760
結束頁: 766
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