Single quantum dots as local temperature markers

Nano Lett. 2007 Oct;7(10):3102-5. doi: 10.1021/nl071606p. Epub 2007 Aug 30.


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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Nanotechnology / methods*
  • Photometry / methods*
  • Quantum Dots*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Thermography / methods*