Fingering Instabilities in Dewetting Nanofluids

Pauliac-Vaujour, E and Stannard, A and Martin, CP and Blunt, MO and Notingher, I and Moriarty, P and Vancea, I and Thiele, U (2008) Fingering Instabilities in Dewetting Nanofluids. Physical Review Letters, 100 . 176102-1-176102-4.

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Official URL: http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000017176102000001&idtype=cvips&gifs=yes

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.

Item Type:Article
Schools/Departments:Faculty of Science > School of Physics and Astronomy
ID Code:903
Deposited By:Moriarty, P.J.
Deposited On:19 May 2008 14:28
Last Modified:19 May 2008 14:28

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