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Fingering instabilities in dewetting nanofluids.

Pauliac-Vaujour, E; Stannard, A; Martin, CP; Blunt, MO; Notingher, I; Moriarty, PJ; Vancea, I; (2008) Fingering instabilities in dewetting nanofluids. Physical Review Letters , 100 (17) , Article 176102. 10.1103/PhysRevLett.100.176102. Green open access

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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 in 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 (London) 426, 271 (2003)10.1038/nature02087], reproduce the patterns we observe experimentally.

Type: Article
Title: Fingering instabilities in dewetting nanofluids.
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.100.176102
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.100.176102
Language: English
Additional information: © 2008 The American Physical Society
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1384926
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