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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
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]
  • [2] I.L. Medintz, H.T. Uyeda, E.R. Goldman, H. Mattoussi, Nat. Mater. 4, 435 (2005) http://dx.doi.org/10.1038/nmat1390[Crossref]
  • [3] B.Q. Sun, A.T. Findikoglu, M. Sykora, D.J. Werder, V.I. Klimov, Nano Lett. 9, 1235 (2009) http://dx.doi.org/10.1021/nl9001469[Crossref]
  • [4] J. Lee, P. Hernandez, J. Lee, A.O. Govorov, N.A. Kotov, Nat. Mater. 6, 291 (2007) http://dx.doi.org/10.1038/nmat1869[Crossref]
  • [5] A.O. Govorov et al., Nano Lett. 6, 984 (2006) http://dx.doi.org/10.1021/nl0602140[Crossref]
  • [6] S. Mackowski, J. Phys.-Condens. Mat. 22, 193102 (2010) http://dx.doi.org/10.1088/0953-8984/22/19/193102[Crossref]
  • [7] K. Ray, R. Badugu, J.R. Lakowicz, J. Am. Chem. Soc. 128, 8998 (2006) http://dx.doi.org/10.1021/ja061762i[Crossref]
  • [8] J. Zhang, R. Badugu, J.R. Lakowicz, Plasmonics 3, 3 (2008) http://dx.doi.org/10.1007/s11468-007-9047-6[Crossref]
  • [9] A.L. Efros, M. Rosen, Phys. Rev. Lett. 78, 1110 (1997) http://dx.doi.org/10.1103/PhysRevLett.78.1110[Crossref]
  • [10] K. Pechstedt, T. Whittle, J. Baumberg, T. Melvin, J. Phys. Chem. C 114, 12069 (2010) http://dx.doi.org/10.1021/jp100415k[Crossref]
  • [11] N. Gaponik et al., J. Phys. Chem. B 106, 7177 (2002) http://dx.doi.org/10.1021/jp025541k[Crossref]
  • [12] J. Kimling et al., J. Phys. Chem. B 110, 15700 (2006) http://dx.doi.org/10.1021/jp061667w[Crossref]
  • [13] S. Wörmke et al., J. Fluoresc. 18, 611 (2008) http://dx.doi.org/10.1007/s10895-008-0310-9[Crossref]
  • [14] S. Mackowski et al., Nano Lett. 8, 558 (2008) http://dx.doi.org/10.1021/nl072854o[Crossref]
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11534-010-0128-3
Identifiers
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