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|Title: ||Modelling approaches to the dewetting of evaporating thin films of nanoparticle suspensions|
|Authors: ||Thiele, Uwe|
Archer, Andrew J.
Robbins, Mark J.
|Issue Date: ||2009|
|Publisher: ||© IOP Publishing Ltd|
|Citation: ||THIELE, U. ... et al, 2009. Modelling approaches to the dewetting of evaporating thin films of nanoparticle suspensions. Journal of Physics: Condensed Matter, 21 (26), 264016.|
|Abstract: ||We review recent experiments on dewetting thin films of evaporating colloidal nanoparticle
suspensions (nanofluids) and discuss several theoretical approaches to describe the ongoing
processes including coupled transport and phase changes. These approaches range from
microscopic discrete stochastic theories to mesoscopic continuous deterministic descriptions. In
particular, we describe (i) a microscopic kinetic Monte Carlo model, (ii) a dynamical density
functional theory and (iii) a hydrodynamic thin film model.
Models (i) and (ii) are employed to discuss the formation of polygonal networks, spinodal
and branched structures resulting from the dewetting of an ultrathin ‘postcursor film’ that
remains behind a mesoscopic dewetting front. We highlight, in particular, the presence of a
transverse instability in the evaporative dewetting front, which results in highly branched
fingering structures. The subtle interplay of decomposition in the film and contact line motion is
Finally, we discuss a simple thin film model (iii) of the hydrodynamics on the mesoscale.
We employ coupled evolution equations for the film thickness profile and mean particle
concentration. The model is used to discuss the self-pinning and depinning of a contact line
related to the ‘coffee-stain’ effect.
In the course of the review we discuss the advantages and limitations of the different
theories, as well as possible future developments and extensions.|
|Description: ||This article was published in the serial, Journal of Physics: Condensed Matter [© IOP Press]. The definitive version is available at: http://dx.doi.org/10.1088/0953-8984/21/26/264016|
|Sponsor: ||AJA and MJR gratefully acknowledge RCUK and EPSRC,
respectively, for financial support. We acknowledge support by
the European Union via the FP6 and FP7 Marie Curie schemes
(grants MRTN-CT-2004005728 (PATTERNS) and PITN-GA-
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.1088/0953-8984/21/26/264016|
|Appears in Collections:||Published Articles (Maths)|
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