Self-organised microdots formed by dewetting in a highly volatile liquid

Journal of Colloid and Interface Science
Rita TothThomas Graule

Abstract

Dewetting induced self-organisation was used to prepare an ordered microstructure from a highly volatile liquid. Dewetting of an evaporating iron oxide precursor solute on silicon substrate resulted in arrays of microdots with nearly hexagonal and tetragonal symmetries. Ordered structures form either by stick-slip motion or fingering instability at the receding contact line of evaporating droplets. Subsequent thermal treatment at 550 °C yields crystalline Fe(2)O(3) microdots with a diameter range of 1-4 μm. The size, density and shape of the microdots can be changed by using patterned substrates with different surface energies.

References

Jun 5, 2003·Chaos·Olaf KarthausMasatsugu Shimomura
Sep 8, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Zhaoxiang Deng, Chengde Mao
Apr 29, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Alexandra Muñoz-BonillaJuan Rodriguez-Hernandez
Jul 15, 2009·Journal of Colloid and Interface Science·V M BogatyrevJ Skubiszewska-Zieba
May 22, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·R Z Rogowski, A A Darhuber

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