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Fabrication of Uniform Hierarchical Mesoporous Wrinkled Silica Nanoparticles and Their Applications: Chemical Mechanical Planarization, Solar Cell, and Electrorheological Fluid : 균일한 다공성 주름진 실리카 나노입자의 제조와 응용: 화학적 기계적 평탄화, 태양 전지, 전기유변유체
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- Authors
- Advisor
- 장정식
- Major
- 공과대학 화학생물공학부
- Issue Date
- 2018-02
- Publisher
- 서울대학교 대학원
- Keywords
- Nanomaterials ; Mesoporous silica nanomaterials ; Spherical mesoporous silica nanoparticles ; Chemical mechanical planarization ; Solar cells ; Electrorheological fluids
- Description
- 학위논문 (박사)-- 서울대학교 대학원 : 공과대학 화학생물공학부, 2018. 2. 장정식.
- Abstract
- Mesoporous silica nanomaterials have received much attention due to their dramatic increased surface to volume ratio. These porous structures have been used extensively in a variety of applications such as catalyst supporters, adsorption, separation, drug delivery, electrodes, and hard templates for fabrication of nanocomposites due to their unique features. Among various structures of mesoporous silica nanomaterials, spherical mesoporous silica nanoparticles have attracted much attention because they provide excellent pore accessibility and smooth molecular diffusion. Therefore, various methods for the fabrication of spherical mesoporous silica nanoparticles with a range of pore structure types have been reported, and have contributed to the development of fields such as packing materials for chromatography, drug delivery, cosmetics, and adsorption. However, despite the variety of methods for preparing spherical mesoporous silica nanoparticles, it should be still required to develop fabrication methods of spherical mesoporous silica nanoparticles with uniformity and high yields.
This dissertation introduces a method for fabricating uniform hierarchical mesoporous wrinkled silica nanoparticles. Furthermore, formation mechanism of the uniform spherical mesoporous silica naoparitcles was discussed by investigating the factors affecting the particle size and pore size of the naoparitcles. Thus, a complete method for high-yield production of uniform hierarchical mesoporous wrinkled silica nanoparticles with tunable particle size and pore size is provided. The prepared uniform mesoporous silica nanoparticles manifested better performance than non-porous silica nanoparticles of the same size in applications of abrasives in chemical mechanical planarization, scattering materials in dye sensitized solar cells, and hard templates for fabricating nanocomposite of ER fluids, demonstrating the superiority of the mesoporous structure. This dissertation suggests that silica nanoparticles with mesoporous structure offer the potential for performance enhancement in applications where non-porous silica spheres are currently used.
- Language
- English
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