bei Google ScholarTitelangaben
Markus, Paul ; Martínez-Tong, Daniel E. ; Papastavrou, Georg ; Algeria, Angel:
Effect of environmental humidity on the ionic transport of poly(ethylene oxide) thin films, investigated by local dielectric spectroscopy.
In: Soft Matter.
Bd. 16
(2020)
Heft 13
.
- S. 3203-3208.
ISSN 1744-6848
DOI: https://doi.org/10.1039/C9SM02471A
Abstract
The effect of humidity on the ionic transport in the amorphous phase of poly(ethylene oxide) thin films has been studied by local dielectric spectroscopy. We explored a controlled humidity range between 15% RH and 50% RH. AFM-based local dielectric imaging allowed the thin film topography and the corresponding dielectric contrast maps to be obtained simultaneously. No humidity effect on the film topography was observed whereas large variation of the dielectric signal could be detected. In addition, we observed a clear dielectric contrast in different locations on the thin film surface. At selected regions with high contrast in the dielectric maps, we performed nanoDielectric Spectroscopy (nDS) measurements covering the frequency range from 5 Hz to 100 kHz. By modeling these spectroscopy results, we quantified the conductivity of the amorphous phase of the semicrystalline poly(ethylene oxide) films. The crystalline fraction of the PEO thin films was extracted and found to be about 36%, independently of humidity. However, the average conductivity increased by a factor of 25 from 2 × 10⁻¹⁰ to 5 × 10⁻⁹ S cm⁻¹, by changing environmental humidity in the explored % RH range.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Physikalische Chemie II Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Physikalische Chemie II > Lehrstuhl Physikalische Chemie II - Univ.-Prof. Dr. Georg Papastavrou Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren > Bayerisches Zentrum für Batterietechnik - BayBatt Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 19 Mär 2020 08:25 |
| Letzte Änderung: | 12 Jan 2022 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/54641 |