Armoogum, DA;
Marsh, RJ;
Nicolaou, N;
Mongin, O;
Blanchard-Desce, M;
Bain, AJ;
(2008)
Stimulated emission depletion and fluorescence correlation spectroscopy of a branched quadrupolar chromophore.
In: Gaburro, Z and Cabrini, S and Talapin, D, (eds.)
Nanophotonic Materials V.
Society of Photo-Optical Instrumentation Engineers (SPIE): San Diego, CA, USA.
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Abstract
Stimulated emission depletion (STED) and single molecule fluorescence correlation spectroscopy (FCS) are used to determine stimulated emission cross-sections and investigate non-radiative relaxation in a branched quadrupolar chromophore (OM77). The results are used as inputs to simulations of single molecule STED by which the feasibility of STED control of the single molecule fluorescence cycle call be assessed. Single molecule STED in OM77 is shown to be readily achievable; however its effectiveness in reducing triplet trapping is apparently mediated by fast non-radiative relaxation processes other than intersystem crossing and rapid quenching of the triplet state in a non-deoxygenated environment.
| Type: | Proceedings paper |
|---|---|
| Title: | Stimulated emission depletion and fluorescence correlation spectroscopy of a branched quadrupolar chromophore |
| Event: | Conference on Nanophotonic Materials V |
| Location: | San Diego, CA |
| Dates: | 2008-08-10 - 2008-08-12 |
| ISBN-13: | 9780819472502 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.794558 |
| Publisher version: | http://dx.doi.org/10.1117/12.794558 |
| Language: | English |
| Additional information: | Copyright © 2008 (year) Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. |
| Keywords: | Stimulated Emission Depletion, Fluorescence Correlation Spectroscopy, Single Molecule, Non-radiative relaxation, Dynamics, Microscopy, Excitation, Proteins, States |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/113002 |
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