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Researchers from University of Electronic Science and Technology Report on Findings in Technological Science (The effect of MWCNTs on the performance...

July 4, 2014



Researchers from University of Electronic Science and Technology Report on Findings in Technological Science (The effect of MWCNTs on the performance of alpha-sexithiophene OTFT device and its gas-sensing property)

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Science are discussed in a new report. According to news originating from Chengdu, People's Republic of China, by NewsRx correspondents, research stated, "In this paper, bottom contact organic thin-film transistor (OTFT) gas sensors were prepared. Silicon dioxide (SiO2) and titanium/aurum (Ti/Au) were used as the insulating layer and the electrode for the device, respectively."

Our news journalists obtained a quote from the research from the University of Electronic Science and Technology, "The multi-walled carbon nanotubes (MWCNTs)/alpha-sexithiophene (alpha-6T) bilayer films were used as the active layer, and alpha-6T single layer sensitive film was also prepared for comparison purpose. The electrical and trace NO2-sening properties of these two OTFT gas sensors were tested and analyzed. The results showed that, the OTFT device based on MWCNTs/alpha-6T bilayer had obviously better electrical properties, better stabilities and higher NO2-sening response values than the device with alpha-6T single layer, in which both the carrier mobility (mu) and on/off current ratio enhanced two order of magnitude. The improved performance of bilayer OTFT can be explained that MWCNTs acted as highly conducting bridges connecting the crystalline terraces in the alpha-6T film. Threshold voltage (V (T)), carrier mobility, on/off current ratio and grid current which showed extremely similar variation trend as source-drain current, were optional parameters to reveal the gas-sensing characteristic of OTFT gas sensors."

According to the news editors, the research concluded: "Morphology analysis showed that the special feature of MWCNTs had certain influence on the gas-sensing properties."

For more information on this research see: The effect of MWCNTs on the performance of alpha-sexithiophene OTFT device and its gas-sensing property. Science China-Technological Sciences, 2014;57(6):1101-1108. Science China-Technological Sciences can be contacted at: Science Press, 16 Donghuangchenggen North St, Beijing 100717, Peoples R China (see also Science).

The news correspondents report that additional information may be obtained from H.L. Tai, Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Sch Optoelect Informat, Chengdu 610054, People's Republic of China. Additional authors for this research include B. Zhang, C.L. Duan, G.Z. Xie and Y.D. Jiang.

Keywords for this news article include: Asia, Chengdu, Science, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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