Global analysis of quenching of the time-resolved emission of ZnO nanocrystals by adsorbed rhodamine B on the basis of Tachiya theory
(2015) In Journal of Photochemistry and Photobiology, A: Chemistry 296. p.35-39- Abstract
- Normally dye molecules are adsorbed onto the nanocrystal (NC) surface in dye-NC mixed solution, but it is very unlikely that all dye molecules present in the solution will be attached to NCs. The distribution of dye molecules on the NC surface is an important factor to take into account while investigating the quenching of NC emission via energy transfer to adsorbed dye molecules. Here, we analysed time-resolved fluorescence data of ZnO NCs in the presence of rhodamine B (RhB) using Tachiya theory, which assumes the Poisson distribution of dye molecules among the NCs. Energy transfer rate from NC to a dye molecule was found to be much faster than the intrinsic fluorescence decay rate of NCs and fluorescence quenching rate due to intrinsic... (More)
- Normally dye molecules are adsorbed onto the nanocrystal (NC) surface in dye-NC mixed solution, but it is very unlikely that all dye molecules present in the solution will be attached to NCs. The distribution of dye molecules on the NC surface is an important factor to take into account while investigating the quenching of NC emission via energy transfer to adsorbed dye molecules. Here, we analysed time-resolved fluorescence data of ZnO NCs in the presence of rhodamine B (RhB) using Tachiya theory, which assumes the Poisson distribution of dye molecules among the NCs. Energy transfer rate from NC to a dye molecule was found to be much faster than the intrinsic fluorescence decay rate of NCs and fluorescence quenching rate due to intrinsic trap states present in the NC. The association constant was also calculated to acquire information on the nature of association of dye molecules with NCs. (C) 2014 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5085234
- author
- Kumar, Pushpendra ; Pascher, Torbjörn LU ; Tachiya, M. and Pal, Suman Kalyan
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Energy transfer, Tachiya model, ZnO NCs, Trap states, Time-resolved, fluorescence, TCSPC
- in
- Journal of Photochemistry and Photobiology, A: Chemistry
- volume
- 296
- pages
- 35 - 39
- publisher
- Elsevier
- external identifiers
-
- wos:000346891400005
- scopus:84908006014
- ISSN
- 1873-2666
- DOI
- 10.1016/j.jphotochem.2014.09.011
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 1a7259a1-e799-4286-bf2b-c00ec43e3a23 (old id 5085234)
- date added to LUP
- 2016-04-01 14:15:08
- date last changed
- 2022-01-27 23:34:29
@article{1a7259a1-e799-4286-bf2b-c00ec43e3a23, abstract = {{Normally dye molecules are adsorbed onto the nanocrystal (NC) surface in dye-NC mixed solution, but it is very unlikely that all dye molecules present in the solution will be attached to NCs. The distribution of dye molecules on the NC surface is an important factor to take into account while investigating the quenching of NC emission via energy transfer to adsorbed dye molecules. Here, we analysed time-resolved fluorescence data of ZnO NCs in the presence of rhodamine B (RhB) using Tachiya theory, which assumes the Poisson distribution of dye molecules among the NCs. Energy transfer rate from NC to a dye molecule was found to be much faster than the intrinsic fluorescence decay rate of NCs and fluorescence quenching rate due to intrinsic trap states present in the NC. The association constant was also calculated to acquire information on the nature of association of dye molecules with NCs. (C) 2014 Elsevier B.V. All rights reserved.}}, author = {{Kumar, Pushpendra and Pascher, Torbjörn and Tachiya, M. and Pal, Suman Kalyan}}, issn = {{1873-2666}}, keywords = {{Energy transfer; Tachiya model; ZnO NCs; Trap states; Time-resolved; fluorescence; TCSPC}}, language = {{eng}}, pages = {{35--39}}, publisher = {{Elsevier}}, series = {{Journal of Photochemistry and Photobiology, A: Chemistry}}, title = {{Global analysis of quenching of the time-resolved emission of ZnO nanocrystals by adsorbed rhodamine B on the basis of Tachiya theory}}, url = {{http://dx.doi.org/10.1016/j.jphotochem.2014.09.011}}, doi = {{10.1016/j.jphotochem.2014.09.011}}, volume = {{296}}, year = {{2015}}, }