Type

Journal Article

Authors

David Corcoran
Ullrich Steiner
Uwe Thiele
Arousian Arshak
Colm O'Dwyer
George Amarandei

Subjects

Chemistry

Topics
polymer films au nanoparticle spatial distribution low molecular weight polymer thin films thin films gold nanoparticles poly methyl methacrylate

Effect of Au nanoparticle spatial distribution on the stability of thin polymer films. (2013)

Abstract The stability of thin poly(methyl-methacrylate) (PMMA) films of low molecular weight on a solid substrate is controlled by the areal coverage of gold nanoparticles (NPs) present at the air-polymer interface. As the polymer becomes liquid the Au NPs are free to diffuse, coalesce, and aggregate while the polymer film can change its morphology through viscous flow. These processes lead at the same time to the formation of a fractal network of Au NPs and to the development of spinodal instabilities of the free surface of the polymer films. For thinner films a single wavelength is observed, while for thicker films two wavelengths compete. With continued heating the aggregation process results in a decrease in coverage, the networks evolve into disordered particle assemblies, while the polymer films flatten again. The disordering occurs first on the smallest scales and coincides (in thicker films) with the disappearance of the smaller wavelength. The subsequent disordering on larger scales causes the films to flatten.
Collections Ireland -> University of Limerick -> PubMed

Full list of authors on original publication

David Corcoran, Ullrich Steiner, Uwe Thiele, Arousian Arshak, Colm O'Dwyer, George Amarandei

Experts in our system

1
Colm O'Dwyer
University College Cork
Total Publications: 121
 
2
George Amarandei
University of Limerick
Total Publications: 4