Single-particle fluorescence intensity fluctuations of carbon nanodots

Somes K. Das, Yiyang Liu, Sinhea Yeom, Doo Young Kim, Christopher I. Richards

Research output: Contribution to journalArticlepeer-review

159 Scopus citations

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.

Original languageEnglish
Pages (from-to)620-625
Number of pages6
JournalNano Letters
Volume14
Issue number2
DOIs
StatePublished - Feb 12 2014

Keywords

  • Carbon nanodot
  • fluorescence jumps and quenched states
  • nanostructure
  • single particle fluorescence

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering

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