Preferential self-healing at grain boundaries in plasma-treated graphene.

Nature Materials
P VinchonL Stafford

Abstract

Engineering of defects located in grains or at grain boundaries is central to the development of functional materials. Although there is a surge of interest in the formation, migration and annihilation of defects during ion and plasma irradiation of bulk materials, these processes are rarely assessed in low-dimensional materials and remain mostly unexplored spectroscopically at the micrometre scale due to experimental limitations. Here, we use a hyperspectral Raman imaging scheme providing high selectivity and diffraction-limited spatial resolution to examine plasma-induced damage in a polycrystalline graphene film. Measurements conducted before and after very low-energy (11-13 eV) ion bombardment show defect generation in graphene grains following a zero-dimensional defect curve, whereas domain boundaries tend to develop as one-dimensional defects. Damage generation is slower at grain boundaries than within the grains, a behaviour ascribed to preferential self-healing. This evidence of local defect migration and structural recovery in graphene sheds light on the complexity of chemical and physical processes at the grain boundaries of two-dimensional materials.

References

Aug 20, 2004·Nature·Ayako HashimotoSumio Iijima
Oct 16, 2004·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Andrea Carlo Ferrari, John Robertson
Oct 2, 2007·Nature Materials·A V Krasheninnikov, F Banhart
Aug 5, 2010·Advanced Materials·Rong YangGuangyu Zhang
Aug 24, 2010·Nature Materials·Oleg V Yazyev, Steven G Louie
Nov 13, 2010·Science·Rassin GrantabRodney S Ruoff
Nov 26, 2010·ACS Nano·Florian BanhartArkady V Krasheninnikov
Dec 15, 2010·Nano Letters·Pierre L LevesqueRichard Martel
Dec 29, 2010·The Journal of Chemical Physics·Yang-Bo ZhouDa-Peng Yu
Dec 14, 2011·Nano Letters·Yung-Chang LinPo-Wen Chiu
May 5, 2012·Nano Letters·Simon KuraschUte Kaiser
Jul 7, 2012·Nano Letters·Axel EckmannCinzia Casiraghi
Nov 9, 2012·Accounts of Chemical Research·Adam W TsenJiwoong Park
Jan 19, 2013·ACS Nano·Georgi DiankovDavid Goldhaber-Gordon
May 31, 2014·Nature Communications·Jani KotakoskiJannik C Meyer
Jun 25, 2014·ACS Nano·Matteo BrunaAndrea C Ferrari
Oct 7, 2014·Nature Nanotechnology·Amaia Zurutuza, Claudio Marinelli
Jan 31, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Ryan BeamsLukas Novotny
Mar 8, 2019·Nature Communications·Krishna BalasubramanianSrinivasan Raghavan
Jul 3, 2020·The Review of Scientific Instruments·G Robert BigrasL Stafford

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