Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-019-12451-8
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Funding
- Engineering Research Center (ERC) Program of the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning (MSIP) [NRF-2015R1A5A1037627]
- MOTIE (Ministry of Trade, Industry and Energy) [10051601]
- NRF of Korea [2015R1A2A2A04006933, 2019R1A2C2003430]
- Creative-Pioneering Researchers Program of Seoul National University
- Research Resettlement Fund of Seoul National University
- National Research Foundation of Korea [21A20130000016] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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While cracks are usually considered detrimental, crack generation can be harnessed for various applications, for example in ceramic materials, via directing crack propagation and crack opening. Here, we find that electron beam irradiation prompts a crack suppression phenomenon in a copper (Cu) thin film on a polyimide substrate, allowing for the control of crack formation in terms of both location and shape. Under tensile strain, cracks form on the unirradiated region of the Cu film whereas cracks are prevented on the irradiated region. We attribute this to the enhancement of the adhesion at the Cu-polyimide interface by electrons transmitted through the Cu film. Finally, we selectively form conductive regions in a Cu film on a polyimide substrate under tension and fabricate a strain-responsive organic light-emitting device.
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