From point defects in graphene to two-dimensional amorphous carbon.
By J. Kotakoski, A. Krasheninnikov, U. Kaiser, Jannik C. Meyer. Physical Review Letters, 2011
655 citations recorded by the source corpus.
While crystalline two-dimensional materials have become an experimental reality during the past few years, an amorphous 2D material has not been reported before. Here, using electron irradiation we create an sp2-hybridized one-atom-thick flat carbon membrane with a random arrangement of polygons, including four-membered carbon rings. We show how the transformation occurs step by step by nucleation and growth of low-energy multivacancy structures constructed of rotated hexagons and other polygons. Our observations, along with first-principles calculations, provide new insights to the bonding behavior of carbon and dynamics of defects in graphene. The created domains possess a band gap, which may open new possibilities for engineering graphene-based electronic devices.
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/6bdc8c15fc6b80583057c16af1ed02eebc5d7782
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Citations in the corpus
- The Role of Defect Sites in Nanomaterials for Electrocatalytic Energy Conversion (2019, methodology): “Reprinted with permission from Kotakoski et al.17 Copyright 2011 American Physical Society.”
- Production and processing of graphene and related materials (2020, background): “7(b)); a small fraction (~20%) of the sheet consists of bilayer graphene (BLG) as indicated by the Moiré pattern [98] and some of the area (~10%) shows an amorphous carbon phase [99].”
- Spectroscopic investigation of defects in two-dimensional materials (2016, background): “The SW defects can be formed by rapidly cooling from high temperature or under electron-beam irradiation [13, 52].”