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Number of results

Journal

2011 | 9 | 2 | 287-292

Article title

Fluorescence spectroscopy of semiconductor CdTe nanocrystals: preparation effect on photostability

Content

Title variants

Languages of publication

EN

Abstracts

EN
We report on continuous-wave and time-resolved fluorescence spectroscopy studies of CdTe water-soluble nanocrystals at room temperature. For nanocrystals spread directly on the substrate we observe large variation both in fluorescence maximum energy and fluorescence lifetime. We attribute this to the influence of the surface of the nanocrystals on the stability of excitations in the nanocrystals. As the fluorescence lifetime of the nanocrystals is monitored, we find it increases with time from 6 to 18 ns and then saturates. Placing the nanocrystals in a polymer matrix remarkably improves the photostability and all the above-mentioned effects are diminished. Upon mixing the nanocrystals with gold spherical nanoparticles we observe a decrease of the fluorescence intensity due to efficient energy transfer to the nanoparticles.

Publisher

Journal

Year

Volume

9

Issue

2

Pages

287-292

Physical description

Dates

published
1 - 4 - 2011
online
20 - 2 - 2011

Contributors

author
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland
author
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland
author
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland
  • Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland

References

  • [1] V. Klimov, Semiconductor and Metal Nanocrystals: Synthesis and Electronic and Optical Properties (Taylor & FrancisInc., New York, 2003) http://dx.doi.org/10.1201/9780203913260[Crossref]
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  • [14] S. Mackowski et al., Nano Lett. 8, 558 (2008) http://dx.doi.org/10.1021/nl072854o[Crossref]

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11534-010-0128-3
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