Published November 2007
| public
Journal Article
Quantum Dot Photon Statistics Measured by Three-Dimensional Particle Tracking
Abstract
We present an instrument for performing correlation spectroscopy on single fluorescent particles while tracking their Brownian motion in three dimensions using real-time feedback. By tracking CdSe/ZnS quantum dots in water (diffusion coefficient ∼ 20 μm^2/s), we make the first measurements of photon antibunching (at ∼10 ns) on single fluorophores free in solution and find fluorescence lifetime heterogeneity within a quantum dot sample. In addition, we show that 2-mercaptoethanol suppresses short time-scale intermittency (1 ms to 1 s) in quantum dot fluorescence by reducing time spent in the off-state.
Additional Information
© 2007 American Chemical Society. Received 11 September 2007. Published online 19 October 2007. Published in print 1 November 2007. This work was supported by NSF Grant CCF-0323542 and by the Institute for Collaborative Biotechnologies through Grant DAAD19-03-D-004 from the Army Research Office. K.M. acknowledges support from an NDSEG fellowship. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not reflect the views of these funding agencies.Additional details
- Eprint ID
- 79832
- DOI
- 10.1021/nl0723376
- Resolver ID
- CaltechAUTHORS:20170807-082812104
- CCF-0323542
- NSF
- DAAD19-03-D-004
- Army Research Office (ARO)
- National Defense Science and Engineering Graduate (NDSEG) Fellowship
- Created
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2017-08-07Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field