Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 36, Pages 30797-30804Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b06980
Keywords
polyaromatic hydrocarbons; graphene quantum dots; surface chemistry; graphene exfoliation; photonic crystal
Funding
- NASA [NASA-NNX13AQ60G]
- DuPont Young Faculty Award
- U.S. National Science Foundation (NSF) under CAREER Award [CMMI-1253085]
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We investigate the pi-pi stacking of polyaromatic hydrocarbons (PAHs) with graphene surfaces, showing that such interactions are general across a wide range of PAH sizes and species, including graphene quantum dots. We synthesized a series of graphene quantum dots with sulfonyl, amino, and carboxylic functional groups and employed them to exfoliate and disperse pristine graphene in water. We observed that sulfonyl-functionalized graphene quantum dots were able to stabilize the highest concentration of graphene in comparison to other functional groups; this is consistent with prior findings by pyrene. The graphene nanosheets prepared showed excellent colloidal stability, indicating great potential for applications in electronics, solar cells, and photonic displays which was demonstrated in this work.
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