Change search
ReferencesLink to record
Permanent link

Direct link
Impedance spectroscopy characterization of relaxation mechanisms in gold-chitosan nanocomposites
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Alexandru Ioan Cuza University, Romania.
Show others and affiliations
2015 (English)In: Composites Part B: Engineering, ISSN 1359-8368, Vol. 71, 210-217 p.Article in journal (Refereed) Published
Abstract [en]

Au-Chi nanocomposites with different AuNPs additions were investigated. The dispersion of AuNPs in polymer matrix was observed using s-SNOM analysis. The dielectric properties as a function of temperature show two relaxation processes: (1) a primary alpha-relaxation process, at low temperatures; (2) a second low frequency relaxation at temperatures between 70 degrees C and 150 degrees C identified as the sigma-relaxation often associated with short range ion mobility. In nanocomposite films, the sigma-relaxation process overcomes the alpha-relaxation process so that the glass transition is no longer detected. The dielectric nonlinear properties (tunability) shown an increase of dipolar moment with AuNPs additions and this results are in good correlation with matrix modification in FTIR investigation.

Place, publisher, year, edition, pages
2015. Vol. 71, 210-217 p.
Keyword [en]
Polymer-matrix composites (PMCs), Electrical properties, Physical properties
National Category
Materials Chemistry
URN: urn:nbn:se:su:diva-115269DOI: 10.1016/j.compositesb.2014.11.038ISI: 000348889100023OAI: diva2:799792


Available from: 2015-03-31 Created: 2015-03-18 Last updated: 2015-03-31Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Neagu, Alexandra
By organisation
Department of Materials and Environmental Chemistry (MMK)
In the same journal
Composites Part B: Engineering
Materials Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 90 hits
ReferencesLink to record
Permanent link

Direct link