English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/218366
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Effect of environmental humidity on the ionic transport of poly(ethylene oxide) thin films, investigated by local dielectric spectroscopy

AuthorsMarkus, Paul; Martínez-Tong, Daniel E. ; Papastavrou, Georg; Alegría, Ángel
Issue Date2020
PublisherRoyal Society of Chemistry (UK)
CitationSoft Matter 16(13): 3203-3208 (2020)
AbstractThe 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.
Publisher version (URL)https://doi.org/10.1039/C9SM02471A
URIhttp://hdl.handle.net/10261/218366
DOIhttp://dx.doi.org/10.1039/C9SM02471A
ISSN1744-683X
E-ISSN1744-6848
Appears in Collections:(CFM) Artículos
Files in This Item:
File Description SizeFormat 
effecspectros.pdf1,43 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.