Ahmed, Sk. Faruque Nagashima, So Lee, Ji Yeong Lee, Kwang-Ryeol Kim, Kyung-Suk Moon, Myoung-Woon 2024-01-20T09:02:11Z 2024-01-20T09:02:11Z 2021-09-02 2014-09 0008-6223 https://pubs.kist.re.kr/handle/201004/126398 Amorphous carbon films grown by ion beam deposition from hydrocarbon precursors on compliant polymer substrates are shown here to undergo spontaneous self-assembled folding during growth. When deposited up to 30 min, the deposition-induced stretch strain of an amorphous carbon film on poly(dimethylsiloxane) (PDMS) with a Young's modulus of 1-2 MPa reached more than 50%, which is much higher than usually observed compressive mismatch strains of approximately 1-2% on silicon. During deposition of the carbon film, compliant PDMS substrates allowed large amplitude film buckling to let in lateral growth of the film with the significant compressive mismatch strain. The film wrinkled at a low strain of approximately 1% at an early stage of deposition. Then, the wrinkled film was observed to transform its configuration through two different nonlinear modes; formations of ridges and asymmetric localized folds. Due to the biaxial nature of the deposited thin film, the wrinkled film showed herringbone or labyrinth patterns for strains less than 10%, while the folds were made in random orientations to create asymmetric disordered tessellation for strains more than 30%. (C) 2014 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD DIAMOND-LIKE CARBON FOCUSED ION-BEAM THIN-FILMS AMORPHOUS-CARBON MECHANICAL-PROPERTIES ELASTOMERIC POLYMER PATTERNS WRINKLES SURFACE FABRICATION Self-assembled folding of a biaxially compressed film on a compliant substrate Article 10.1016/j.carbon.2014.04.056 1 CARBON, v.76, pp.105 - 112 CARBON 76 105 112 scie scopus 000337985300013 2-s2.0-84901764672 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article DIAMOND-LIKE CARBON FOCUSED ION-BEAM THIN-FILMS AMORPHOUS-CARBON MECHANICAL-PROPERTIES ELASTOMERIC POLYMER PATTERNS WRINKLES SURFACE FABRICATION