PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Czasopismo
2011 | 9 | 2 | 287-292
Tytuł artykułu

Fluorescence spectroscopy of semiconductor CdTe nanocrystals: preparation effect on photostability

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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.
Wydawca

Czasopismo
Rocznik
Tom
9
Numer
2
Strony
287-292
Opis fizyczny
Daty
wydano
2011-04-01
online
2011-02-20
Twórcy
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland, bujak@fizyka.umk.pl
  • Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland
autor
  • 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, mackowski@fizyka.umk.pl
Bibliografia
  • [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]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-010-0128-3
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.