Journal
CANADIAN JOURNAL OF CHEMISTRY
Volume 89, Issue 2, Pages 104-109Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/V10-096
Keywords
carbon nanoparticles; luminescence; quenching; surface passivation; Stern-Volmer
Categories
Funding
- National Science Foundation (NSF)
- Susan G. Komen for the Cure Postdoctoral Fellowship
- Palmetto Academy
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0967423] Funding Source: National Science Foundation
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Photoluminescence properties of carbon nanoparticles from different treatments in various suspensions were evaluated, and the results were in general agreement with those available in the literature. An interesting observation was that the quenching of luminescence emissions in the aqueous suspended carbon nanoparticles by aliphatic amines deviated from the classical Stern-Volmer behavior in a somewhat unusual fashion, exhibiting reversed quenching (increasing luminescence intensities) at very low quencher concentrations. The implication of the observation to the mechanistic framework that may account for photoluminescence emissions in both functionalized and naked carbon nanoparticles is proposed and discussed.
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