title: Catalyst-free bottom-up growth of graphene nanofeatures along with molecular templates on dielectric substrates.
abstract: Synthesis of graphene nanostructures has been investigated to provide outstanding properties for various applications. Herein, we report molecular thin film-assisted growth of graphene into nanofeatures such as nanoribbons and nanoporous sheets along with a predetermined molecular orientation on dielectric substrates without metal catalysts. A Langmuir-Blodgett (LB) method was used for the formation of the molecularly patterned SiO2substrates with ferric stearate layers, which acted as a template for the directional growth of the polypyrrole graphene precursor. The nanofeatures of the graphene were determined by the number of ferric stearate layers (e.g., nanoribbons from multiple layers and nanoporous sheets from a single layer). The graphene nanoribbons (GNRs) containing pyrrolic N enriched edges exhibited a p-type semiconducting behavior, whereas the nanoporous graphene sheets containing inhomogeneous pores and graphitic N enriched basal planes exhibited the typical electronic transport of nitrogen-doped graphene. Our approaches provide two central methods for graphene synthesis such as bottom-up and direct processes for the future development of graphene nanoelectronics.
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea. sshyeon@skku.edu hyoyoung@skku.edu and Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, 08826 Seoul, Korea.
authors.forename: Misook
authors.initials: M
authors.lastname: Min
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea. sshyeon@skku.edu hyoyoung@skku.edu and Centre for Integrated Nanostructure Physics (CINAP), Institute of Basic Science (IBS), Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea.
authors.forename: Sohyeon
authors.initials: S
authors.lastname: Seo
authors.affiliation: Centre for Integrated Nanostructure Physics (CINAP), Institute of Basic Science (IBS), Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea and Department of Energy and Science, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea.
authors.forename: Yeoheung
authors.initials: Y
authors.lastname: Yoon
authors.affiliation: Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, 08826 Seoul, Korea.
authors.forename: Kyungjune
authors.initials: K
authors.lastname: Cho
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea. sshyeon@skku.edu hyoyoung@skku.edu and Centre for Integrated Nanostructure Physics (CINAP), Institute of Basic Science (IBS), Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea.
authors.forename: Sae Mi
authors.initials: SM
authors.lastname: Lee
authors.affiliation: Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, 08826 Seoul, Korea.
authors.forename: Takhee
authors.initials: T
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea. sshyeon@skku.edu hyoyoung@skku.edu and Centre for Integrated Nanostructure Physics (CINAP), Institute of Basic Science (IBS), Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea and Department of Energy and Science, Sungkyunkwan University, 2066 Seoburo, Jangan-gu, Suwon, Gyeonggi-do, Korea.
authors.forename: Hyoyoung
authors.initials: H
authors.lastname: Lee