DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Taek-Soo | - |
dc.contributor.advisor | 김택수 | - |
dc.contributor.author | Kang, Sumin | - |
dc.date.accessioned | 2023-06-21T19:33:19Z | - |
dc.date.available | 2023-06-21T19:33:19Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1021057&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/307856 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 기계공학과, 2021.2,[viii, 78 p. :] | - |
dc.description.abstract | Transferring functional nanofilms onto target substrates is a cornerstone to developing nanofilm-based applications. Conventional nanofilm transfer technologies, which can be categorized into following three methods: wet-etching transfer, electrochemical delamination, and mechanical transfer, have been established successfully. However, selective transfer of a target nanofilm pattern, nanofilm transfer to a tubular substrate, and damage-free nanofilm transfer have remained challenges. Here, advanced transfer methods are presented by exploiting fracture mechanics based approaches and unique properties of a water surface. First, capillary-force-driven switchable delamination of nanofilms and its application to a green selective transfer process which can integrate sophisticated nanofilm patterns without recourse to lithographic techniques were demonstrated. Second, a method for transferring nanofilms onto tubular substrates was developed by using the technique for free-standing of nanofilm on water surface and the controlled rolling manner. Diverse applications including an electroactive polymer tube actuator for steerable microcatheter, a super-elastic nanofilm tube, and a tubular stretchable sensor were demonstrated by this method. Third, it was investigated that the adhesion energy of nanofilm can be quantitatively controlled by using various liquid environments. The liquid-assisted adhesion control achieved effective reduction of structural defects in a transferred nanofilm. Finally, nanofilm cracking behavior in the mechanical transfer process was explored by controlling several factors such as thickness of a target substrate, loading angle, and loading rate. Moreover, the mechanism of cracking was explained by considering crack deflection effect, and a guideline for crack-free transfer was provided. I expect that the advanced transfer methods presented here would contribute to development and commercialization of many novel applications. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | nanofilm▼atransfer process▼ainterfacial fracture behavior▼aadhesion energy▼awater surface | - |
dc.subject | 나노박막▼a전사 공정▼a계면 파괴 거동▼a접합 에너지▼a물 표면 | - |
dc.title | Fracture behavior and advanced transfer methods of nanofilms | - |
dc.title.alternative | 나노박막의 차세대 전사 방법 및 파괴 거동 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :기계공학과, | - |
dc.contributor.alternativeauthor | 강수민 | - |
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