The Nature of Metastable AA′ Graphite: Low Dimensional Nano- and Single-Crystalline Forms

Jae Kap Lee, Jin-Gyu Kim, K. P. S. S. Hembram, Yong-Il Kim, Bong-Ki Min, Yeseul Park, Jeon Kook Lee, Dong Ju Moon, Wooyoung Lee, Sang Gil Lee, Phillip John

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10 Citations (Scopus)
37 Downloads (Pure)

Abstract

Over the history of carbon, it is generally acknowledged that Bernal AB stacking of the sp 2 carbon layers is the unique crystalline form of graphite. The universal graphite structure is synthesized at 2,600∼3,000 °C and exhibits a micro-polycrystalline feature. In this paper, we provide evidence for a metastable form of graphite with an AA' structure. The non-Bernal AA' allotrope of graphite is synthesized by the thermal- and plasma-treatment of graphene nanopowders at ∼1,500 °C. The formation of AA' bilayer graphene nuclei facilitates the preferred texture growth and results in single-crystal AA' graphite in the form of nanoribbons (1D) or microplates (2D) of a few nm in thickness. Kinetically controlled AA' graphite exhibits unique nano- and single-crystalline feature and shows quasi-linear behavior near the K-point of the electronic band structure resulting in anomalous optical and acoustic phonon behavior.

Original languageEnglish
Article number39624
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 21 Dec 2016

ASJC Scopus subject areas

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    Lee, J. K., Kim, J-G., Hembram, K. P. S. S., Kim, Y-I., Min, B-K., Park, Y., Lee, J. K., Moon, D. J., Lee, W., Lee, S. G., & John, P. (2016). The Nature of Metastable AA′ Graphite: Low Dimensional Nano- and Single-Crystalline Forms. Scientific Reports, 6, [39624]. https://doi.org/10.1038/srep39624