Optical properties and electron dynamics in carbon nanodots

Xiaoming Wen, Shujuan Huang, Gavin Conibeer, Santosh Shrestha, Pyng Yu, Yon-Rui Toh, Jau Tang

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

Carbon nanodots (CNDs) have emerged as fascinating materials with exceptional electronic and optical properties, and thus they offer promising applications in photonics, photovoltaics and photocatalysis. Herein we study the optical properties and electron dynamics in CNDs using steady state and time-resolved spectroscopy. The photoluminescence (PL) is determined to originate from both core and surface. The massive surface fluorophores result in a broad spectral fluorescence. In addition to various synthesis techniques, it is demonstrated that the PL of CNDs can be extended from the blue to the near infrared by thermal assisted growth. Directional electron transfer was observed as fast as femtosecond in CND-graphene oxide nanocomposites from CND into graphene oxide. These results suggest CNDs can be promising in many applications.

Original languageEnglish
Title of host publicationMicro/Nano Materials, Devices, and Systems
EditorsJames Friend, H. Hoe Tan
Place of PublicationBellingham, WA
PublisherSPIE
Pages1-7
Number of pages7
ISBN (Print)9780819498144
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventMicro/Nano Materials, Devices, and Systems - Melbourne, VIC, Australia
Duration: 9 Dec 201311 Dec 2013

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume8923
ISSN (Print)0277-786X

Conference

ConferenceMicro/Nano Materials, Devices, and Systems
CountryAustralia
CityMelbourne, VIC
Period9/12/1311/12/13

Keywords

  • Carbon nanodots
  • electron dynamics
  • photoluminescence
  • ultrafast spectroscopy

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  • Cite this

    Wen, X., Huang, S., Conibeer, G., Shrestha, S., Yu, P., Toh, Y-R., & Tang, J. (2013). Optical properties and electron dynamics in carbon nanodots. In J. Friend, & H. H. Tan (Eds.), Micro/Nano Materials, Devices, and Systems (pp. 1-7). [89231L] (Proceedings of SPIE; Vol. 8923). Bellingham, WA: SPIE. https://doi.org/10.1117/12.2035308