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

Sung Soo Kim, Myung Jin Park, Jeong Hee Kim, Gwanghyun Ahn, Sunmin Ryu, Byung Hee Hong, Byeong Hyeok Sohn

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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 nanoparticles (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 nanopatterns on graphene using metal NPs.

Original languageEnglish (US)
Pages (from-to)7003-7010
Number of pages8
JournalChemistry of Materials
Volume27
Issue number20
DOIs
StatePublished - Oct 27 2015

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