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Fingering Instabilities in Dewetting Nanofluids

Pauliac-Vaujour, E; Stannard, A; Martin, CP; Blunt, MO; Notingher, I; Moriarty, P; Vancea, I; Thiele, U

Authors

E Pauliac-Vaujour ppxev@nottingham.ac.uk

A Stannard

CP Martin

MO Blunt

I Notingher

P Moriarty

I Vancea

U Thiele

Abstract

The growth of fingering patterns in dewetting nanofluids (colloidal solutions of thiol-passivated gold nanoparticles) has been followed in real time using contrast-enhanced video microscopy. The fingering instability on which we focus here arises from evaporatively-driven nucleation and growth
a nanoscopically thin "precursor" solvent film behind the macroscopic contact line. We find that well-developed isotropic fingering structures only form for a narrow range of experimental parameters. Numerical simulations, based on a modification of the Monte Carlo approach introduced by Rabani et al. [Nature 426, 271 (2003)], reproduce the patterns we observe experimentally.

Journal Article Type Article
Publication Date May 2, 2008
Journal Physical Review Letters
Print ISSN 0031-9007
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 100
Institution Citation Pauliac-Vaujour, E., Stannard, A., Martin, C., Blunt, M., Notingher, I., Moriarty, P., …Thiele, U. (2008). Fingering Instabilities in Dewetting Nanofluids. Physical Review Letters, 100,
Publisher URL http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000017176102000001&idtype=cvips&gifs=yes
Related Public URLs http://www.nottingham.ac.uk/physics/research/nano/publications.htm
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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