Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 2, Issue 10, Pages 1119-1124Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz200450r
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Funding
- Indiana University
- National Science Foundation [CBET 0747751]
- ACS Petroleum Research Fund
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0747751] Funding Source: National Science Foundation
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The band gap and redox potential of semiconductor nanocrystals are two quantities of primary importance for their applications in energy conversion devices. Herein, we report on covalent functionalization of colloidal graphene quantum dots through a solution-chemistry approach and studies of their band gaps and redox potentials. We show that their band gaps and redox potentials can be independently controlled, the former by size and the latter by functionalization. The size and the functionalization dependence of the properties can be numerically reproduced with tight-binding calculations, which thus provides a simple theoretical tool to guide the design of graphene QDs with desired properties.
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