. 2019 Mar 5;24(5):906. doi: 10.3390/molecules24050906
© 2019 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Scheme 3.
Structures of graphite (a) and graphene (b).