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Collodial Cluster Arrays by Electrohydrodynamic Printing Sibel Korkut, Dudley A. Saville,
 

Summary: Collodial Cluster Arrays by Electrohydrodynamic Printing
Sibel Korkut, Dudley A. Saville,
and Ilhan A. Aksay*
Department of Chemical Engineering, Princeton UniVersity, Princeton, New Jersey 08544-5263
ReceiVed July 22, 2008. ReVised Manuscript ReceiVed September 1, 2008
A "stable" electrohydrodynamic jet is used to print arrays of colloidal suspensions on hydrophobic surfaces. Printed
lines break up into sessile drops, and capillary forces guide the self-assembly of colloidal particles during the evaporation
of the liquid, resulting in arrays of colloidal single particles or particle clusters depending on the concentration of the
suspensions. The clusters differ from those formed in the absence of a substrate when the number of particles is larger
than three. Multiple structures are found for the same number of particles.
I. Introduction
Organizationofcolloidalparticlesinwell-definedarrangements
isofinterestformanyapplicationsincludingtop-downproduction
of new generation materials and photonic band gap crystals.1,2
Patterning with colloidal particles typically involves multiple
steps such as production of a suitable pattern on a mask or a
substrate, introducing the colloidal particles or their precursors
to the area to be patterned, and particle self-assembly under the
influence of mechanical barriers, electrical and capillary forces,
or chemical affinity.3-7

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science