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Abstract：
An easy bottom-up method for the preparation of photoluminescent (PL) graphene quantum dots (GODs) and graphene oxide (GO) has been developed by tuning the carbonization degree of citric acid and dispersing the carbonized products into alkaline solutions. The GQDs are nanosheets similar to 15 nm in width, and 0.5-2.0 nm in thickness. They show a relatively strong (9.0%) PL quantum yield and an excitation-independent PL emission activity. In contrast, the GO nanostructures consist of sheets that are hundreds of nanometers in width and similar to 1 nm in height. They exhibit a relatively weak (2.2%) PL quantum yield and an excitation-dependent PL emission activity. (C) 2012 Elsevier Ltd. All rights reserved.
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CARBON
ISSN： 0008-6223
Year： 2012
Issue： 12
Volume： 50
Page： 4738-4743
5 . 8 6 8
JCR@2012
1 0 . 5 0 0
JCR@2023
ESI Discipline： CHEMISTRY;
JCR Journal Grade：1
CAS Journal Grade：1
Cited Count：
WoS CC Cited Count： 1530
SCOPUS Cited Count： 1628
ESI Highly Cited Papers on the List： 34 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 0
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