Screen-printed single-walled carbon nanotube networks and their use for dimethyl methylphosphonate detection
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Single-walled carbon nanotube (SWNT) films were prepared on silicon/silica substrates by screen-printed technique at a wafer scale, and their sensing properties to dimethyl methylphosphonate (DMMP) were studied. The SWNT networks were characterized by field-emission scanning electron microscope. The resistance responses to different concentrations of DMMP vapors were investigated at room temperature. The results showed that the resistance changes of the screen-printed SWNT films increased rapidly in varying concentrations ranging from 20 to 200 ppm. The sensor exhibited high resistance responses, good reproducibility and excellent long-term stability for DMMP vapor detection. The screen-printed SWNT networks would be potentially extended to large-scale, low cost and simple manufacturing sensor applications.
This work was supported by the National Natural Science Foundation of China via Grant Nos. 60736005 and 60876051, the Foundation for Innovation Groups of NSFC via No. 61021061, and the Program for New Century Excellent Talents in University via Grant no. NCET-08-0086. The authors would like to thank Chengdu Organic Chemicals Co. Ltd. of China and Yun Ye of Fuzhou University for help with the screen-printed SWNTs.