title: Self-Assembly of Complex Multimetal Nanostructures from Perforated Lamellar Block Copolymer Thin Films.
abstract: We introduce a facile and effective fabrication of complex multimetallic nanostructures through block copolymer self-assembly. Two- and three-dimensional complex nanostructures, such as "nanomesh," "double-layered nanomeshes," and "surface parallel cylinders on nanomesh," can be fabricated using the self-assembly of perforated lamellar morphology in block copolymer thin films. Simultaneous integration of various metallic elements, including Pt, Au, and Co, into the self-assembled morphologies generates multimetal complex nanostructures with highly interconnected morphology and a large surface. The resultant metal nanostructures with a large surface area, robust electrical connectivity, and well-defined alloy composition demonstrate a high-performance electrochemical catalysis for hydrogen evolution reaction (current density: 6.27 mA/cm2@0.1 V and Tafel slope: 43 mV/dec).
authors.affiliation: National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material 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 (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Gil Yong
authors.initials: GY
authors.lastname: Lee
authors.affiliation: National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material 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 (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Hyeong Min
authors.initials: HM
authors.lastname: Jin
authors.affiliation: National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Chang Yun
authors.initials: CY
authors.lastname: Moon
authors.affiliation: National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Jun Soo
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Pusan National University , Pusan 46241, Republic of Korea.
authors.forename: Kwang Ho
authors.initials: KH
authors.lastname: Kim
authors.affiliation: Device Laboratory, Device & System Research Center, Samsung Advanced Institute of Technology , Suwon 16678, Republic of Korea.
authors.forename: Seong-Jun
authors.initials: SJ
authors.lastname: Jeong
authors.affiliation: National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Material Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Sang Ouk
authors.identifier: http://orcid.org/0000-0003-1513-6042
authors.initials: SO
authors.lastname: Kim
keywords: block copolymer; catalyst; hydrogen evolution; metal nanostructure; self-assembly