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Microfabricated Deposition Nozzles for Direct-Write Assembly of Three-Dimensional Periodic Structures


  • This material is based upon work supported by the National Science Foundation (Grant# CTS-0120 978 and DMI-0099 360) and in-kind funding from Sandia National Laboratories. R. B. Rao thanks the U.S. Department of Defense for an NDSEG research fellowship. SEM analysis was carried out in the Center for Microanalysis of Materials at the Frederick Seitz Materials Research Laboratory, University of Illinois, which is partially supported by the U.S. Department of Energy under grant DEFG02-91-ER45439.


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Direct-write assembly of a three- dimensional periodic structure comprised of hexagonal filaments is demonstated. The structure is created by robotically depositing a concentrated colloidal gel-based ink through a cylindrical deposition nozzle modified by attaching a UV-LIGA (lithography, electroplating, and molding)-fabricated hexagonal micro (μ)-tip that controls filament geometry.

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