Control and manipulation of nano cracks mimicking optical wave

Young D. Suh, Junyeob Yeo, Habeom Lee, Sukjoon Hong, Jinhyeong Kwon, Kyunkyu Kim, Seung Hwan Ko

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Generally, a fracture is considered as an uncontrollable thus useless phenomenon due to its highly random nature. The aim of this study is to investigate highly ordered cracks such as oscillatory cracks and to manipulate via elaborate control of mechanical properties of the cracking medium including thickness, geometry, and elastic mismatch. Specific thin film with micro-sized notches was fabricated on a silicon based substrate in order to controllably generate self-propagating cracks in large area. Interestingly, various nano-cracks behaved similar to optical wave including refraction, total internal reflection and evanescent wave. This novel phenomena of controlled cracking was used to fabricate sophisticated nano/micro patterns in large area which cannot be obtained even with conventional nanofabrication methods. We also have showed that the cracks are directly implementable into a nano/micro-channel application since the cracks naturally have a form of channel-like shape.

Original languageEnglish
Article number17292
JournalScientific Reports
Volume5
DOIs
StatePublished - 27 Nov 2015

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