Single quantum dots as local temperature markers

Sha Li, Kai Zhang, Jui Ming Yang, Liwei Lin, Haw Yang

Research output: Contribution to journalArticlepeer-review

175 Scopus citations

Abstract

This work describes noncontact, local temperature measurements using wavelength shifts of CdSe quantum dots (QDs). Individual QDs are demonstrated to be capable of sensing temperature variations and reporting temperature changes remotely through optical readout. Temperature profiles of a microheater under different input voltages are evaluated based on the spectral shift of QDs on the heater, and results are consistent with a one-dimensional electrothermal model. The theoretical resolution of this technique could go down to the size of a single quantum dot using far-field optics for temperature characterizations of micro/nanostructures.

Original languageEnglish (US)
Pages (from-to)3102-3105
Number of pages4
JournalNano Letters
Volume7
Issue number10
DOIs
StatePublished - Oct 1 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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