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Detection and spectroscopy of gold nanoparticles using supercontinuum white light confocal microscopy
K Lindfors1, T Kalkbrenner, P Stoller
1Laboratory of Physical Chemistry, Swiss Federal Institute of Technology (ETH), CH-8093 Zurich, Switzerland.
Physical Review Letters
|August 25, 2004
Abstract:
We combine confocal microscopy using supercontinuum laser illumination and an interferometric detection technique to identify single nanoparticles of diameter below 10 nm. Spectral analysis of the signal allows us to record the plasmon resonance of a single nanoparticle. Our results hold great promise for fundamental studies of the optical properties of single metal clusters and for their use in biophysical applications.