Facile synthetic method for pristine graphene quantum dots and graphene oxide quantum dots: origin of blue and green
Fei Liu1, Min-Ho Jang, Hyun Dong Ha
1Department of Chemical and Biomolecular, Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
Advanced Materials (Deerfield Beach, Fla.)
|May 29, 2013
Abstract:
Pristine graphene quantum dots and graphene oxide quantum dots are synthesized by chemical exfoliation from the graphite nanoparticles with high uniformity in terms of shape (circle), size (less than 4 nm), and thickness (monolayer). The origin of the blue and green photoluminescence of GQDs and GOQDs is attributed to intrinsic and extrinsic energy states, respectively.


