title: A graphene meta-interface for enhancing the stretchability of brittle oxide layers.
abstract: Oxide materials have recently attracted much research attention for applications in flexible and stretchable electronics due to their excellent electrical properties and their compatibility with established silicon semiconductor processes. Their widespread uptake has been hindered, however, by the intrinsic brittleness and low stretchability. Here we investigate the use of a graphene meta-interface to enhance the electromechanical stretchability of fragile oxide layers. Electromechanical tensile tests of indium tin oxide (ITO) layers on polymer substrates were carried out with in situ observations using an optical microscope. It was found that the graphene meta-interface reduced the strain transfer between the ITO layer and the substrate, and this behavior was well described using a shear lag model. The graphene meta-interface provides a novel pathway for realizing flexible and stretchable electronic applications based on oxide layers.
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Sejeong
authors.initials: S
authors.lastname: Won
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. sblee@kaist.ac.kr.
authors.forename: Jae-Won
authors.initials: JW
authors.lastname: Jang
authors.affiliation: Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Republic of Korea.
authors.forename: Hyung-Jin
authors.initials: HJ
authors.lastname: Choi
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Chang-Hyun
authors.initials: CH
authors.lastname: Kim
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Sang Bong
authors.initials: SB
authors.lastname: Lee
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Yun
authors.initials: Y
authors.lastname: Hwangbo
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Kwang-Seop
authors.initials: KS
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Republic of Korea.
authors.forename: Soon-Gil
authors.initials: SG
authors.lastname: Yoon
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Hak-Joo
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Department of Nanomechanics, Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. jaehkim@kimm.re.kr.
authors.forename: Jae-Hyun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. sblee@kaist.ac.kr.
authors.forename: Soon-Bok
authors.initials: SB
authors.lastname: Lee