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• Main Authors: Yao-Jin Ke, 柯耀進
• Other Authors: 陶雨台
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/5fxvrq

碩士 === 國立中央大學 === 化學學系 === 106 === The diacetylenic molecules in their crystalline state may undergo topchemical polymerization under UV irradiation or heating to form a conjugated poly(eneyne) polymers. In this work, we prepared the solution of a series of linear diacetylenic molecules in organic solvent and shear the solution on a substrate with a scraper. The external shearing force caused the fluid between wafer and the substrate and then diactetylene molecules were transported while the solvent voporized to give a directional film. Then UV irradiation was applied to initialte polymerization to create directional conjugated film. The film structure was characterized by various tools including AFM, Raman, UV, etc. The film was also used as the conduction channel in the fabrication of field-effect transistor. The results show that at low concentration and low shear rate, directional polymer film can best be prepared. The best material to make a good film is 10,12-pentacosadiynoic acid and the film structure was characterized by Raman and atomic force microscopy to confirm the directional morphology and lattice arrangement. Finally, the film was used as the semiconductor layer in the fabrication of field-effect transistor. The mobilities along the shearing direction and that orthogonal to the shearing direction are compared. Polymerization was found to cause cracks and defects so that the mobility was diminished. A second solution shearing step over the cracked film appeared to improve the connectivity of the film and results in an order of improvement in electricity.