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( Li Juan Liang ),( Yasushi Mitsumura ),( Tomoyashi Yukimoto ),( Sei Uemura ),( Toshihide Kamata ),( Kazuki Nakamura ),( Norihisa Kobayashi ) 한국화상학회 2012 한국화상학회지 Vol.18 No.3
The bio-organic thin film transistor (BiOTFT) with the DNA and DNA-surfactant complex as a dielectric layer shows memory function. In order to investigate the effect of surfactant structure on the OTFT memory device performance, different kinds of surfactant were introduced. The octadecyltrimethylammonium chloride (OTMA), ctyltrimethylammonium chloride (CTMA), or lauroylcholine chloride (Lau) as cationic surfactant was mixed with DNA to prepare the DNA complex through the electrostatic interaction. In addition, the different molecular weight DNA also has been studied to analyze the effect of DNA chain length on the performance of the physical property. Many kinds of methods including UV-vis, Circular dichiroism (CD), I-V characteristic and atomic force microscope (AFM) have been applied to analyze the property of DNA complex. In conclusion, all of DNA complex with CTMA, OTMA and Lau revealed to work as the bio-organic thin film transistor memory, and the device fabricated by Lau has the highest ON current and showed better device performance