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Experimental evaluation of diffusion constant in a thin polymer film by triplet lifetime analysis of single molecules

Paper ID Volume ID Publish Year Pages File Format Full-Text
28161 44062 2012 5 PDF Available
Title
Experimental evaluation of diffusion constant in a thin polymer film by triplet lifetime analysis of single molecules
Abstract

We propose a method for dynamically sensing oxygen concentration in a local nanoscale domain of a thin polymer film using histograms of photon interdetection times of single molecules. By temporally analyzing the histograms, a dynamical change in the triplet lifetime of single molecules in thin polymer films with different thicknesses can be measured with respect to the oxygen concentration in a gas cell. From the time lags for observing the triplet lifetime change in the histograms due to differences in the oxygen diffusion times in the films, we estimate the diffusion constants in a local nanoscale domain of films, which approximately corresponds to the reported values in the bulk film. Thus, we conclude that this method is applicable to in situ nanoscale environmental sensors with high spatial resolution in heterogeneous materials, such as polymer blends, biological cells, and thin-film devices.

► Triplet lifetime analysis of single molecules using histograms of photon interdetection times. ► Dynamical O2 concentration monitoring in a local nanoscale domain of a polymer film. ► Estimation of the oxygen diffusion constant of a thin polymer film.

Keywords
Triplet lifetime analysis; Single-molecule spectroscopy; Photon interdetection time analysis method; Oxygen diffusion constant; Thin polymer film
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Experimental evaluation of diffusion constant in a thin polymer film by triplet lifetime analysis of single molecules
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 238, 15 June 2012, Pages 24–28
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us