Spectrally Resolved Analysis of Fluorescence Blinking of Single Dye Molecules in Polymers at Low Temperatures

Title data

Orlov, S. V. ; Naumov, Andrei V. ; Vainer, Yuri G. ; Kador, Lothar:
Spectrally Resolved Analysis of Fluorescence Blinking of Single Dye Molecules in Polymers at Low Temperatures.
In: The Journal of Chemical Physics. Vol. 137 (2012) Issue 19 . - 194903.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4766321

Abstract in another language

We present a method for the spectrally resolved analysis of fluorescence blinking of single quantum emitters. It is based on the well-known technique of repeated recording of single-molecule (SM) fluorescence excitation spectra. The potential of our approach is presented for the example of single tetra-tert-butylterrylene molecules in an amorphous polymer matrix (polyisobutylene), which exhibit fluorescence blinking at cryogenic temperatures. Measuring the spectral dependence of the blinking statistics improves the possibility to clarify the microscopic nature of the dark state(s) of the emitters. We demonstrate how the blinking statistics can be definitely attributed to conformational changes in the local environment of a SM and how the parameters of the corresponding elementary excitations can be measured. The analysis of the blinking statistics as a function of the optical excitation frequency allows us to discriminate between photo-induced and spontaneous transitions into a dark state.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF Research Institutions Research Institutions > Research Centres
Result of work at the UBT:	Yes
DDC Subjects:	500 Science 500 Science > 500 Natural sciences 500 Science > 530 Physics
Date Deposited:	26 Mar 2015 16:15
Last Modified:	27 Jan 2022 12:17
URI:	https://eref.uni-bayreuth.de/id/eprint/8639