Control of colloidal particle deposit patterns within picoliter droplets ejected by ink-jet printing

Jungho Park, Jooho Moon

Research output: Contribution to journalArticle

477 Citations (Scopus)

Abstract

Particle deposit morphologies that resulted from evaporating ink-jetted microdroplets were controlled by varying the ink compositions and concentrations. The ink was a well-dispersed aqueous dispersion of monodisperse silica microspheres. Silica particles suspended in the microdroplet undergo self-assembly upon the evaporation of the solvent. A ringlike deposit of the self-assembled silica particles was produced from the water-based ink, while a uniform two-dimensional monolayer with a well-ordered hexagonal structure was obtained from the mixed-solvent-based inks. Variations in the deposit patterns can be explained in terms of competing effects between the convective and Marangoni flows, which vary with the types of the high-boiling-point solvent added to the ink. The macroscopic shape and microstructure of the silica colloidal deposits were observed by SEM, AFM, and a confocal microscope.

Original languageEnglish
Pages (from-to)3506-3513
Number of pages8
JournalLangmuir
Volume22
Issue number8
DOIs
Publication statusPublished - 2006 Apr 11

Fingerprint

Ink jet printing
inks
Ink
printing
Deposits
deposits
Silicon Dioxide
Silica
silicon dioxide
convective flow
Boiling point
Microspheres
boiling
Self assembly
self assembly
Monolayers
Evaporation
Microscopes
microscopes
evaporation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

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Control of colloidal particle deposit patterns within picoliter droplets ejected by ink-jet printing. / Park, Jungho; Moon, Jooho.

In: Langmuir, Vol. 22, No. 8, 11.04.2006, p. 3506-3513.

Research output: Contribution to journalArticle

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