Single-particle fluorescence intensity fluctuations of carbon nanodots.
basic_science · Level V
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- Record sourced from PubMed, PMID 24397573.
- Also identified by DOI 10.1021/nl403820m.
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Abstract
Fluorescent carbon nanodots (CNDs) were synthesized in oxidized and reduced forms and were analyzed at the single-particle level. Images of single CNDs at different excitation energies revealed significant heterogeneity in the lower energy trap sites between particles. We observed that a high percentage of reduced CND particles transitioned between multiple fluorescence intensity levels indicative of multichromophoric systems. Despite this behavior, individual CNDs exhibit single-step photobleaching and transient blinking to the background level suggesting single-molecule behavior.