Techniques for patterning zeolite thin film

• Main Authors: Chon-Hei Lam, 林駿熙
• Other Authors: Dun-Yen Kang
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/736zb8

碩士 === 國立臺灣大學 === 化學工程學研究所 === 105 === This paper reports on a generalized method by which to simultaneously manipulate the self-assembly and orientation of zeolite LTA nanocrystals. This process, referred to as surfactant-mediated self-assembly (SMSA), creates zeolite LTA thin films with long-range ordered cylindrical patterns, wherein the {100} faces of zeolite LTA crystals are preferably oriented parallel to the support surface. This approach makes it possible to control the diameter as well as the depth of the cylindrical patterns in zeolite thin films fabricated via scalable wet deposition. To elucidate the mechanism underlying the SMSA process, we applied in situ imaging to cast solutions subjected to a temperature swing. Our results indicate that the cylindrical patterns may develop from micelles of the surfactant, which make up a thermodynamic phase in the cast solution. We also demonstrate that the apparent dielectric constant and optical haze of the zeolite LTA thin films can be engineered by altering the dimensions of the cylindrical patterns.