Epitaxially Self-Assembled Alkane Layers for Graphene Electronics

Young-Jun Yu; Gwan-Hyoung Lee; Ji Il Choi; Yoon Su Shim; Chul-Ho Lee; Seok Ju Kang; Sunwoo Lee; Kwang Taeg Rim; George W Flynn; James Hone; Yong-Hoon Kim; Philip Kim; Colin Nuckolls; Seokhoon Ahn

doi:10.1002/adma.201603925

Epitaxially Self-Assembled Alkane Layers for Graphene Electronics

Adv Mater. 2017 Feb;29(5). doi: 10.1002/adma.201603925. Epub 2016 Dec 1.

Authors

Young-Jun Yu¹, Gwan-Hyoung Lee², Ji Il Choi³, Yoon Su Shim³, Chul-Ho Lee⁴, Seok Ju Kang⁵, Sunwoo Lee⁶, Kwang Taeg Rim⁷, George W Flynn⁷, James Hone⁸, Yong-Hoon Kim³, Philip Kim⁹, Colin Nuckolls⁷, Seokhoon Ahn¹⁰

Affiliations

¹ ICT Materials and Components Basic Research Group, Electronics and Telecommunications Research Institute (ETRI), Daejeon, 34129, Korea.
² Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, Korea.
³ Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea.
⁴ KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 136-701, Korea.
⁵ School of Energy and Chemical Engineering, UNIST, Ulsan, 689-798, Korea.
⁶ Department of Electrical Engineering, Columbia University, New York, NY, 10027, USA.
⁷ Department of Chemistry, Columbia University, New York, NY, 10027, USA.
⁸ Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA.
⁹ Department of Physics, Harvard University, Cambridge, MA, 02138, USA.
¹⁰ Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk, 565-905, Korea.

PMID: 27905154
DOI: 10.1002/adma.201603925

Abstract

The epitaxially grown alkane layers on graphene are prepared by a simple drop-casting method and greatly reduce the environmentally driven doping and charge impurities in graphene. Multiscale simulation studies show that this enhancement of charge homogeneity in graphene originates from the lifting of graphene from the SiO₂ surface toward the well-ordered and rigid alkane self-assembled layers.

Keywords: graphene; mobility; passivation; self-assembly; van der Waals interaction.