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Linear colloidal crystal arrays by electrohydrodynamic printing H. F. Poon, D. A. Saville,a
 

Summary: Linear colloidal crystal arrays by electrohydrodynamic printing
H. F. Poon, D. A. Saville,a
and I. A. Aksayb
Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544, USA
Received 6 August 2008; accepted 8 September 2008; published online 2 October 2008
We use electrohydrodynamic jets of colloidal suspensions to produce arrays of colloidal crystalline
stripes on surfaces. A critical factor in maintaining a stable jet is the distance of separation between
the nozzle and the surface. Colloidal crystalline stripes are produced as two wetting lines of the
deployed suspension merge during drying. To ensure that the two wetting lines merge, the
"deployed-line-width" to "particle size" ratio is kept below a critical value so that the capillary
forces overcome the frictional forces between the particles and the substrate. 2008 American
Institute of Physics. DOI: 10.1063/1.2990680
One- and two-dimensional 2D colloidal structures are
important building blocks and have been widely used for
higher order architectures--nanowires,1,2
photonic bandgap
microstrips,3
electronic and optical devices,46
microchip
reactors,7

  

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

 

Collections: Materials Science