at Google ScholarTitle data
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.
Vol. 16
(2020)
Issue 13
.
- pp. 3203-3208.
ISSN 1744-6848
DOI: https://doi.org/10.1039/C9SM02471A
Abstract in another language
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.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Institutions of the University: | Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II > Chair Physical Chemistry II - Univ.-Prof. Dr. Georg Papastavrou Research Institutions Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt Research Institutions > Research Centres |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 19 Mar 2020 08:25 |
| Last Modified: | 12 Jan 2022 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/54641 |