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

Rita Toth, Jakob Heier, Jean Nicolas Tisserant, Enyedy Eva Anna, Artur Braun, Thomas Graule

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 2O 3 microdots with a diameter range of 1-4μm. The size, density and shape of the microdots can be changed by using patterned substrates with different surface energies.

Original languageEnglish
Pages (from-to)201-209
Number of pages9
JournalJournal of colloid and interface science
Volume378
Issue number1
DOIs
Publication statusPublished - Jul 15 2012

Keywords

  • Dewetting
  • Hexagonal and tetragonal order
  • Iron oxide microstructure
  • Microdot
  • Receding contact line
  • Self-organisation
  • Stick-slip motion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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