Printing small dots from large drops

Talbot, Emma L, Yow, Huai N, Yang, Lisong, Berson, Arganthael, Biggs, Simon R and Bain, Colin D (2015) Printing small dots from large drops. ACS Applied Materials and Interfaces, 7 6: 3782-3790. doi:10.1021/am5087177

Author Talbot, Emma L
Yow, Huai N
Yang, Lisong
Berson, Arganthael
Biggs, Simon R
Bain, Colin D
Title Printing small dots from large drops
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8252
Publication date 2015-01-23
Year available 2015
Sub-type Article (original research)
DOI 10.1021/am5087177
Open Access Status Not yet assessed
Volume 7
Issue 6
Start page 3782
End page 3790
Total pages 9
Place of publication Washington, United States
Publisher American Chemical Society
Language eng
Abstract Printing of droplets of pure solvents containing suspended solids typically leads to a ring stain due to convective transport of the particles toward the contact line during evaporation of the solvent. In mixtures of volatile solvents, recirculating cells driven by surface tension gradients are established that lead to migration of colloidal particles toward the center of the droplet. In favorable cases, a dense disk of particles forms with a diameter much smaller than that of the droplet. In the latter stages of drying, convective transport of the particles radially toward the contact line still occurs. Two strategies are described to fix the distribution of particles in a compact disk much smaller than the initial diameter of the drying droplet. First, a nanoparticulate clay is added to induce an evaporation-driven sol–gel transition that inhibits convective flow during the latter stages of drying. Second, a nonadsorbing polymer is added to induce depletion flocculation that restricts particle motion after the particles have been concentrated near the center of the droplet. The area of the resulting deposit can be as little as 10% of the footprint of the printed droplet.
Keyword Droplet deposition
Ink-jet printing
Sol-gel transition
Depletion flocculation
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID EP/H018913/1
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Engineering, Architecture and Information Technology Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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