title: Laser Writing Block Copolymer Self-Assembly on Graphene Light-Absorbing Layer.
abstract: Recent advance of high-power laser processing allows for rapid, continuous, area-selective material fabrication, typically represented by laser crystallization of silicon or oxides for display applications. Two-dimensional materials such as graphene exhibit remarkable physical properties and are under intensive development for the manufacture of flexible devices. Here we demonstrate an area-selective ultrafast nanofabrication method using low intensity infrared or visible laser irradiation to direct the self-assembly of block copolymer films into highly ordered manufacturing-relevant architectures at the scale below 12 nm. The fundamental principles underlying this light-induced nanofabrication mechanism include the self-assembly of block copolymers to proceed across the disorder-order transition under large thermal gradients, and the use of chemically modified graphene films as a flexible and conformal light-absorbing layers for transparent, nonplanar, and mechanically flexible surfaces.
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Hyeong Min
authors.initials: HM
authors.lastname: Jin
authors.affiliation: Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Lee
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Ju Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Applied Physics, Hanyang University , Ansan, Gyeonggi-do 15588, Republic of Korea.
authors.forename: Seung-Woo
authors.initials: SW
authors.lastname: Son
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Bong Hoon
authors.initials: BH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Hwan Keon
authors.initials: HK
authors.lastname: Lee
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Jeong Ho
authors.initials: JH
authors.lastname: Mun
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Seung Keun
authors.initials: SK
authors.lastname: Cha
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Jun Soo
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637, United States.
authors.forename: Paul F
authors.initials: PF
authors.lastname: Nealey
authors.affiliation: Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Keon Jae
authors.initials: KJ
authors.lastname: Lee
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Sang Ouk
authors.initials: SO
authors.lastname: Kim
keywords: block copolymer; directed self-assembly; graphene; laser; photothermal effect; self-assembly