Inkjet Printing of Viscous Monodisperse Microdroplets by Laser-Induced Flow Focusing

Paul Delrot, Miguel Modestino, François Gallaire, Demetri Psaltis, Christophe Moser

Research output: Contribution to journalArticle

Abstract

The on-demand generation of viscous microdroplets to print functional or biological materials remains challenging using conventional inkjet-printing methods, mainly due to aggregation and clogging issues. In an effort to overcome these limitations, we implement a jetting method to print viscous microdroplets by laser-induced shockwaves. We experimentally investigate the dependence of the jetting regimes and the droplet size on the laser-pulse energy and on the inks' physical properties. The range of printable liquids with our device is significantly extended compared to conventional inkjet printers's performances. In addition, the laser-induced flow-focusing phenomenon allows us to controllably generate viscous microdroplets up to 210 mPa s with a diameter smaller than the nozzle from which they originated (200 μm). Inks containing proteins are printed without altering their functional properties, thus demonstrating that this jetting technique is potentially suitable for bioprinting.

Original languageEnglish (US)
Article number024003
JournalPhysical Review Applied
Volume6
Issue number2
DOIs
StatePublished - Aug 8 2016

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printing
inks
lasers
plugging
printers
nozzles
physical properties
proteins
liquids
pulses
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Inkjet Printing of Viscous Monodisperse Microdroplets by Laser-Induced Flow Focusing. / Delrot, Paul; Modestino, Miguel; Gallaire, François; Psaltis, Demetri; Moser, Christophe.

In: Physical Review Applied, Vol. 6, No. 2, 024003, 08.08.2016.

Research output: Contribution to journalArticle

Delrot, Paul ; Modestino, Miguel ; Gallaire, François ; Psaltis, Demetri ; Moser, Christophe. / Inkjet Printing of Viscous Monodisperse Microdroplets by Laser-Induced Flow Focusing. In: Physical Review Applied. 2016 ; Vol. 6, No. 2.
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