title: Photocatalytic Nanostructuring of Graphene Guided by Block Copolymer Self-Assembly.
abstract: Nanostructured graphene exhibits many intriguing properties. For example, precisely controlled graphene nanomeshes can be applied in electronic, photonic, or sensing devices. However, fabrication of nanopatterned graphene with periodic supperlattice remains a challenge. In this work, periodic graphene nanomesh was fabricated by photocatalysis of single-layer graphene suspended on top of TiO2-covered nanopillars, which were produced by combining block copolymer nanolithography with atomic layer deposition. Graphene nanoribbons were also prepared by the same method applied to a line-forming block copolymer template. This mask-free and nonchemical/nonplasma route offers an exciting platform for nanopatterning of graphene and other UV-transparent materials for device engineering.
authors.affiliation: Department of Micro- and Nanotechnology and ‡Center for Nanostructured Graphene, Technical University of Denmark , 2800 Konegs Lyngby, Denmark.
authors.forename: Zhongli
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Micro- and Nanotechnology and ‡Center for Nanostructured Graphene, Technical University of Denmark , 2800 Konegs Lyngby, Denmark.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.affiliation: Department of Micro- and Nanotechnology and ‡Center for Nanostructured Graphene, Technical University of Denmark , 2800 Konegs Lyngby, Denmark.
authors.forename: Lars
authors.initials: L
authors.lastname: Schulte
authors.affiliation: Department of Micro- and Nanotechnology and ‡Center for Nanostructured Graphene, Technical University of Denmark , 2800 Konegs Lyngby, Denmark.
authors.forename: Kristoffer
authors.initials: K
authors.lastname: Almdal
authors.affiliation: Department of Micro- and Nanotechnology and ‡Center for Nanostructured Graphene, Technical University of Denmark , 2800 Konegs Lyngby, Denmark.
authors.forename: Sokol
authors.initials: S
authors.lastname: Ndoni
keywords: TiO2-covered nanopillars; block copolymer nanolithography; graphene nanomesh; selective-area photocatalysis; suspended graphene