Fabrication of three-dimensional (3D) hybrid nanostructures using material conversion methods and their applications소재 전환 기술을 이용한 3차원 하이브리드 나노 구조체의 제작과 응용에 관한 연구

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3D nanostructures have greatly attracted many interests for various practical applications due to their large surface area, periodicity, continuity and porosity. Especially, the 3D hybrid nanostructures can realize more superior material properties due to synergetic effect in each phase compared to single phase 3D nanostructures. However, most of the known manufacturing methods still need to optimize fabricating conditions of 3D nanostructures and 3D hybrid nanostructures with binary or ternary phase in a bulk-scale. Proximity-field nanopatterning (PnP) offers a novel efficient route to produce well-oriented and porous 3D nanostructures using simple optical set-up. PnP has many advantages including experimental simplicity, scalability to large area and vibration tolerance. These advantages make this technique attractive for practical application such as photonics, energy devices, sensors, catalysts and many others. The following materials conversion methods, including atomic layer deposition (ALD) and electroplating, can give various functionalities (i.g. electrical conductivity, thermal conductivity and catalytic activity) in 3D nanostructures. Therefore, a good understanding of the material conversion process is necessary for achieving 3D hybrid nanostructures in a bulk-scale. We successfully attain polymer/ceramic and ceramic/metals hybrid nanostructures via sequential material conversion process including PnP/ALD and PnP/ALD/electroplating, respectively. Also we analyze the surface, composition and interface between $1^{st}$ and $2^{nd}$ phase materials through various measurement tools such as SEM, AFM, XRD, EDS and many other. Finally, I provide the successful use of the 3D hybrid nanostructures for practical applications in photocatalyst with high activity and recyclability, optical polymer films with highly mechanical properties, transparency, and thermal conductivity, and reinforced metal nanocomposites with highly mechanical strength in a bulk-scale. We hope that these results can provide useful design criteria of 3D hybrid nanostructures for practical application.
Advisors
Jeon, Seok Wooresearcher전석우researcher
Description
한국과학기술원 :신소재공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 신소재공학과, 2018.2,[vi, 106 p. :]

Keywords

3D hybrid nanostructures▼aproximity-field nanopatterning▼aatomic layer deposition; electroplating; mechanical properties; 3차원 하이브리드 나노 구조체▼a근접장 나노 패터닝▼a원자층 증착법▼a전기도금▼a기계적 물성

URI
http://hdl.handle.net/10203/265018
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=734492&flag=dissertation
Appears in Collection
MS-Theses_Ph.D.(박사논문)
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