Naked oats-derived dual-emission carbon nanodots for ratiometric sensing and cellular imaging

Lihong Shi, Xiaofeng Li, Yanyan Li, Xiangping Wen, Junfen Li, Martin M F CHOI, Chuan Dong, Shaomin Shuang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

100 Citations (Scopus)


We report a green and facile strategy for fabrication of dual-emission carbon nanodots (CDs), and demonstrate their applications in ratiometric sensing and cellular imaging. Dual-emission CDs have been prepared by pyrolysis and microwave treatment of naked oats, providing a novel way for the production of dual luminance CDs without the request of tedious synthetic methodology or the use of toxic/expensive solvents and starting materials. Their intriguing dual fluorescence behavior is observed when the excitation wavelength is between 250 and 310 nm. The well-resolved dual emission bands manifest excitation and temperature dependence. The obtained CDs were applied as a ratiometric fluorescent sensing platform for precise and quantitative detection of Al3+ ions and pH values, and as optical nanoprobes for cellular imaging.

Original languageEnglish
Pages (from-to)533-541
Number of pages9
JournalSensors and Actuators B: Chemical
Publication statusPublished - Apr 2015

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

User-Defined Keywords

  • Carbon nanodots
  • Cellular imaging
  • Fluorescence
  • Ratiometric sensing


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