Principle of topography-directed inkjet printing for functional micro-tracks in flexible substrates

Chang Min Keum, In Ho Lee, Hea Lim Park, Chiwoo Kim, Björn Lüssem, Jong Sun Choi, Sin Doo Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a general principle of topography-directed (TD) inkjet printing for functional micro-tracks embedded in a flexible elastomer substrate. The essential features of the TD inkjet printing in a micro-structured substrate with periodic grooves and ridges are described in terms of the topographic parameters for the transformation from a single droplet to a filament or an edge-disjoint pattern of ink in the groove. Silver ink, being widely used for producing conductive wires by conventional inkjet printing, is utilized as a testbed in our study. The underlying mechanisms for the spreading and drying processes of ink drops under the topographic compartment can be understood in a two-dimensional parameter space of the aspect ratio of the groove and the contact angle of ink on the substrate. The wetting morphologies of ink droplets are described in an analytical model where the Laplace pressure and the mean curvature at the vapor/ink interface are taken into account. The first principle of the TD inkjet printing would be applicable for constructing a variety of functional micro-tracks with high pattern fidelity from different classes of solutions such as conducting polymers, organic semiconductors, and colloidal nanoparticles.

Original languageEnglish (US)
Article number244902
JournalJournal of Applied Physics
Volume121
Issue number24
DOIs
StatePublished - Jun 28 2017

Fingerprint

inks
printing
topography
grooves
organic semiconductors
conducting polymers
elastomers
compartments
drying
wetting
aspect ratio
ridges
filaments
silver
curvature
wire
vapors
nanoparticles

Cite this

Principle of topography-directed inkjet printing for functional micro-tracks in flexible substrates. / Keum, Chang Min; Lee, In Ho; Park, Hea Lim; Kim, Chiwoo; Lüssem, Björn; Choi, Jong Sun; Lee, Sin Doo.

In: Journal of Applied Physics, Vol. 121, No. 24, 244902, 28.06.2017.

Research output: Contribution to journalArticle

Keum, Chang Min ; Lee, In Ho ; Park, Hea Lim ; Kim, Chiwoo ; Lüssem, Björn ; Choi, Jong Sun ; Lee, Sin Doo. / Principle of topography-directed inkjet printing for functional micro-tracks in flexible substrates. In: Journal of Applied Physics. 2017 ; Vol. 121, No. 24.
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