Directed Self-Assembly of Spherical Particles on Patterned Electrodes by an Applied Electric Field


  • This research was supported by the Army Research Office (W911NF-04-1-0170) and used the shared Resource Facilities supported by the National Science Foundation under NSEC (PHY-0117795) and MRSEC (DMR-0213805) awards.


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Self-assembly of 100 μm spheres on a patterned electrode under the influence of an applied electric field is demonstrated. This process occurs for ordered arrays and arbitrary patterns, over areas up to ∼0.7 cm2, with a defect rate (e.g., missing spheres or extra spheres, circled in Figure) of about 1 %. These arrays of microspheres can be transferred into polymeric matrices, such as poly(dimethylsiloxane), polyurethane, and epoxy.