Quantitative Measurements of the pH-Sensitive Quantum Yield of Fluorophores in Mesoporous Silica Thin Films Using a Drexhage-Type Experiment
Oezelci E, Ruehle B, Weigert F, Lubotzky B, Kewes G, Resch-Genger U, Benson O (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 123
Pages Range: 20468-20475
Journal Issue: 33
Abstract
The photoluminescence quantum yield characterizes the performance of emitters for applications in optical devices, as reporters or probes in material and analytical sciences, and for sensing applications. Quantum yield measurements are challenging for luminescent molecules and nanocrystals immobilized in thin films for many sensor applications, particularly if spatially resolved quantitative luminescence information is desired. We show here that a Drexhage-type experiment, where a silver-coated millimeter-sized sphere is used to modify the local density of states, can provide an elegant approach to counter this challenge. As a representative example of the potential of this method, we measure the pH-dependent photoluminescence quantum yield of fluorescein isothiocyanate bound to a thin mesoporous silica film. The results were compared with those of the studies on the pH dependence of the same dye in solution. We found that our approach can link single fluorophore studies to ensemble measurements and pave the way for the spatially resolved fluorescence measurements of ultralow concentrations of emitters utilized as optically active elements and reporters in thin sensor films or incorporated into membranes.
Involved external institutions
Humboldt-Universität zu Berlin
Germany (DE)
Bundesanstalt für Materialforschung und -prüfung (BAM)
Germany (DE)
Hebrew University of Jerusalem
Israel (IL)
Germany (DE)
Bundesanstalt für Materialforschung und -prüfung (BAM)
Germany (DE)
Hebrew University of Jerusalem
Israel (IL)
How to cite
APA:
Oezelci, E., Ruehle, B., Weigert, F., Lubotzky, B., Kewes, G., Resch-Genger, U., & Benson, O. (2019). Quantitative Measurements of the pH-Sensitive Quantum Yield of Fluorophores in Mesoporous Silica Thin Films Using a Drexhage-Type Experiment. Journal of Physical Chemistry C, 123(33), 20468-20475. https://doi.org/10.1021/acs.jpcc.9b03917
MLA:
Oezelci, Ersan, et al. "Quantitative Measurements of the pH-Sensitive Quantum Yield of Fluorophores in Mesoporous Silica Thin Films Using a Drexhage-Type Experiment." Journal of Physical Chemistry C 123.33 (2019): 20468-20475.
BibTeX: Download