title: Localized Ion-Beam Irradiation-Induced Wrinkle Patterns.
abstract: We observe a localized irradiation-induced wrinkle pattern on poly(dimethylsiloxane) (PDMS) via a long pattern mask. Localized ion-beam irradiation induces an inhomogeneous wrinkle pattern on the treated region. To confirm the inhomogeneity of the entire wrinkle pattern, its morphology was investigated using optical microscopy, which revealed separated regions in the wrinkle pattern. We used atomic force microscopy for quantitative analysis of the wrinkle pattern morphology and analyzed the angular distribution and the direction of compressive stress of the irradiated area. We confirmed the direction of stress release along the distance from the edges, and we achieved control of the orientation of the wrinkle pattern by altering the width of the irradiated area. Investigation of the inhomogeneities in a localized wrinkle formation provides an understanding of the formation mechanism to enhance its performance and application in various fields.
authors.affiliation: Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Hae-Chang
authors.initials: HC
authors.lastname: Jeong
authors.affiliation: Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Hong-Gyu
authors.initials: HG
authors.lastname: Park
authors.affiliation: Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Ju Hwan
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Dae-Shik
authors.initials: DS
authors.lastname: Seo
keywords: inhomogeneous pattern; ion beam; local treatment; poly(dimethylsiloxane); wrinkle