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Multi-furcation assembly of charged aerosols and its application to gas sensing

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Authors
배용준
Advisor
최만수
Major
공과대학 기계항공공학부
Issue Date
2017-02
Publisher
서울대학교 대학원
Keywords
AerosolNanotechnologySelf-assemblyNanoparticle assemblyGas sensor
Description
학위논문 (박사)-- 서울대학교 대학원 : 기계항공공학부, 2017. 2. 최만수.
Abstract
In this thesis, we describe a simple yet practical parallel method to realize novel multi-furcated 3D micro/nanostructures by using the assembly of charged aerosols via spatial differentiation of electric field at atmospheric condition. A combination of generating charged aerosols by spark discharge and manipulating 3D electric field together with ion-induced electrostatic lenses lead to the formation of exotic 3D multi-furcated structures consisting of nanoparticles. By changing the arrangement of dielectric pre-patterns on the silicone substrate, bi-, tri-, tetra- or penta-furcated 3D nanoparticle structures and even interconnections between neighboring structures are precisely controlled. Based on these 3D multi-furcated micro/nanostructures, we propose a novel 3D gas sensor consisting of copper oxide nanoparticles, which exhibits excellent gas sensitivity significantly superior to that of two dimensional film type by more than 200 %. Also, we fabricate the sensor array with CuO and SnO2 nanoparticle bridge structures to demonstrate the selective detecting of NO2 and H2.
Language
Korean
URI
https://hdl.handle.net/10371/118590
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Theses (Ph.D. / Sc.D._기계항공공학부)
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