The study of improved orientability of self-assembling monolayer by assistant silane compound

• Main Authors: Ya-Ching Chang, 張雅晴
• Other Authors: Chih-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/ypfk7x

碩士 === 國立中興大學 === 化學工程學系所 === 107 === 　　Silanization is one of the most commonly used techniques for surface modification which can modify the substrates by grafting functional silane molecules. The grafting orientation of silane molecules plays a crucial role but is seldom investigated in previous studies. In this study, the mutual intercropping technology for agriculture is adopted to improve the grafting orientability of functional silane molecules by using two different silane compounds. One silane compound with a functional amino group (-NH2) is used as the functional silane, in which the amino group can be used as the active site of catalyst for specific applications. The other silane compound named as assistant silane is with benzene structures, which can spatially prevent self-agglomeration by the steric effect of benzene. 　　In this study, the effect of silane self-agglomeration and the bonding characteristics were identified by water contact angle, atomic force microscopy (AFM) and X-ray photoelectron spectroscope (XPS). The optimal silanization mechanism is studied by water contact angle values of the assistant silane and angle-resolved X-ray photoelectron spectroscope (ARXPS). The surface of substrate is tailored with different ratios of functional silane and assistant silane to regulate the surface potential and work function by Kelvin probe force microscopy (KPFM) and ultraviolet photoelectron spectroscopy (UPS). The results of the mono-silanization and the staged-silanization are used to improve the interfacial adhesion between the substrate and the metal layer and to study the immobilized silver nanoparticles, respectively.