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

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2012
Author Toth Rita, Heier Jakob, Tisserant Jean-Nicolas, Anna Enyedy Eva, Braun Artur, Graule Thomas,
Project Self-organization processes to pattern thin films: A bottom-up approach for photoelectrodes
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Original article (peer-reviewed)

Journal JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume (Issue) 378
Page(s) 201 - 209
Title of proceedings JOURNAL OF COLLOID AND INTERFACE SCIENCE
DOI 10.1016/j.jcis.2012.04.011

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 Fe2O3 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.
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