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Volume 184, 2015
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Fluorescence microscopy and spectroscopy of subsurface layer dynamics of polymers with nanometer resolution in the axial direction

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Abstract

We studied the dynamics in ultrathin subsurface layers of an amorphous polymer by the spectra of single fluorescent molecules embedded into the layer by vapor deposition and subsequent controlled diffusion to the desired depth in ≈0.5 nm steps. The spectral trails of single molecules were recorded at 4.5 K as a function of diffusion depth. In depths shallower than 20 nm, the spectral dynamics deviate from those deep in the bulk. Less than 5 nm deep, the linewidths increase rapidly, whereas the number of detected molecules decreases. No zero-phonon lines were observed closer than 0.5 nm to the polymer surface. Possible physical reasons of the observed phenomena are discussed.

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Submitted
03 May 2015
Accepted
14 Jul 2015
First published
21 Jul 2015

Faraday Discuss., 2015,184, 237-249
Article type
Paper
Author version available

Fluorescence microscopy and spectroscopy of subsurface layer dynamics of polymers with nanometer resolution in the axial direction

Y. G. Vainer, Y. I. Sobolev, A. V. Naumov, I. S. Osad'ko and L. Kador, Faraday Discuss., 2015, 184, 237
DOI: 10.1039/C5FD00055F

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