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Shape Control of Electrospun 1D metal oxide/carbon Nanomaterials by Adjusting Precursor and Their Sensor Applications : 전기 방사의 전구체 조절을 통한 일차원 금속산화물/탄소 나노 소재의 표면 형상 제어방법과 이의 센서로의 응용
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- Authors
- Advisor
- 장정식
- Major
- 공과대학 화학생물공학부
- Issue Date
- 2018-02
- Publisher
- 서울대학교 대학원
- Keywords
- electrospinning ; one-dimensional nanomaterials ; carbon nanofiber ; metal oxide ; polypyrrole ; sensor
- Description
- 학위논문 (박사)-- 서울대학교 대학원 : 공과대학 화학생물공학부, 2018. 2. 장정식.
- Abstract
- Due to the structural properties such as high aspect ratio and specific surface area, one-dimensional (1D) nanomaterials have been studied variously for improving the physical properties through constitution and structural molding. Electrospinning is one of the methods for manufacturing 1D nanomaterials using viscous polymer solution. It is advantageous that application fields are greatly expanded because manufacturing is relatively simple from organic materials to inorganic materials by changing spinning conditions. However, there is still lack of research on manufacturing methods for forming a precise 1D structure through the spinning conditions of electrospinng, and methods for manufacturing 1D organic/inorganic composite nanomaterial by deepening it.
This dissertation proposes a method to control the structure shape and composition of the final 1D nanomaterials by applying a mixed polymer solution, solvent and metal oxide precursor to electrospinning. In order to improve the performance, a method of fabricating 1D organic/iorganic composite nanomaterials by coating a conducting polymer, polypyrrole (PPy) on the surface of 1D nanomaterials was proposed and applied to various sensor fields.
Fistlty, polymer solution containing poly(methyl methacrylate) (PMMA), poly(acrylonitrile) (PAN) and cobalt acetate was applied to electrospinning to prepare phase separated nanofibers. Using this method, cobalt oxide nanopartilces (NPs) embedded multichannel carbon nanofibers (C_MCNFs) was fabricated and applied as a glucose sensor electrode material.
Secondly, the method of controlling shape of 1D nanomaterial by mixing two solvents and finally fabricating a complex tube structure for high performance DMMP gas sensor was demonstrated.
Third, to fabricate a metal oxide NPs decorated ultrathin CNF (ZCNF), a polymer solution with a mixture of poly (vinlypyrrolidone) (PVP), PAN and zinc acetate was applied to electrospinng. By using the ZCNF as a sensor electrode, we realized a platelet derived growth factor biosensor with a high sensitivity and fast response time
- Language
- English
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