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Strain-Assisted Wafer-Scale Nanoperforation of Single-Layer Graphene by Arrayed Pt Nanoparticles

Title
Strain-Assisted Wafer-Scale Nanoperforation of Single-Layer Graphene by Arrayed Pt Nanoparticles
Authors
Kim, SSPark, MJKim, JHAhn, GRyu, SHong, BHSohn, BH
Date Issued
Oct-2015
Publisher
AMER CHEMICAL SOC
Abstract
We demonstrate the large-area lithography-free ordered perforation of reduced graphene oxide (rGO) and graphene grown by chemical vapor deposition (CVD) with arrayed Pt nanopartides (NPs) prepared by using self-patterning diblock copolymer micelles. The rGO layers were perforated by Pt NPs formed either on top or bottom surface. On the other hand, CVD graphene was perforated only when the Pt NPs were placed under the graphene layer. Various control experiments confirm that the perforation reaction of CVD graphene was catalyzed by Pt NPs, where the mechanical strain as well as the chemical reactivity of Pt lowered the activation energy barriers for the oxidation reaction of C=C bonds in graphene. Systematic atomic force microscopy and Raman analyses revealed the detailed perforation mechanism. The pore size and spacing can be controlled, and thus our present work may open a new direction in the development of ordered nanopattems on graphene using metal NPs.
URI
http://oasis.postech.ac.kr/handle/2014.oak/35477
ISSN
0897-4756
Article Type
Article
Citation
CHEMISTRY OF MATERIALS, vol. 27, no. 20, page. 7003 - 7010, 2015-10
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 RYU, SUNMIN
Div of Advanced Materials Science
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