Soft X-ray induced damage in PVA-based membranes in water environment monitored by X-ray absorption spectroscopy

Journal article
(Original article)


Publication Details

Author(s): Tzvetkov G, Späth A, Fink R
Journal: Radiation Physics and Chemistry
Publication year: 2014
Volume: 103
Pages range: 84-88
ISSN: 1879-0895


Abstract

The effect of synchrotron X-ray flux in a soft X-ray scanning-transmission microspectroscope (STXM) instrument on the chemical structure of air-filled poly(vinyl alcohol) (PVA) based microbubbles and their stabilizing shell has been examined. Prolonged soft X-ray illumination of the particles in aqueous suspension leads to the breaking of the microbubbles[U+05F3] protective polymer shell and substantial chemical changes. The latter were clarified via a micro-spot C K-edge near-edge X-ray absorption fine structure (NEXAFS) spectroscopy with further respect to the absorbed X-ray doses. Our results revealed a continuous degradation of the PVA network associated with formation of carbonyl- and carboxyl-containing species as well as an increased content of unsaturated bonds. The observed effects must be taken into account in studies of micro- and nanostructured polymer materials utilizing X-rays. © 2014.


FAU Authors / FAU Editors

Fink, Rainer Prof. Dr.
Professur für Physikalische Chemie
Späth, Andreas Dr.
Lehrstuhl für Physikalische Chemie II


External institutions
Sofia University "St. Kliment Ohridski" / Софийски университет "Св. Климент Охридски"


How to cite

APA:
Tzvetkov, G., Späth, A., & Fink, R. (2014). Soft X-ray induced damage in PVA-based membranes in water environment monitored by X-ray absorption spectroscopy. Radiation Physics and Chemistry, 103, 84-88. https://dx.doi.org/10.1016/j.radphyschem.2014.03.038

MLA:
Tzvetkov, George, Andreas Späth, and Rainer Fink. "Soft X-ray induced damage in PVA-based membranes in water environment monitored by X-ray absorption spectroscopy." Radiation Physics and Chemistry 103 (2014): 84-88.

BibTeX: 

Last updated on 2019-07-04 at 14:50