pubs.acs.org/Langmuir © 2009 American Chemical Society
Selective Nanofiber Deposition through Field-Enhanced Electrospinning Zhenwen Ding,†,^ Amani Salim,§,^ and Babak Ziaie*,‡,§,^ †
Department of Physics and ‡School of Electrical and Computer Engineering and §Weldon School of Biomedical Engineering and ^Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 Received May 29, 2009. Revised Manuscript Received July 21, 2009
In this paper, we demonstrate a nanofiber patterning technique using field-enhanced electrospinning. Polyethylene oxide (PEO) nanofibers were electrospun on an elastomeric substrate with gold-coated pyramidal protrusions with the majority of fibers being deposited at the tips. The deposited nanofiber spots ranged from 8 8 μm2 to 60 60 μm2 in size, uniformly covering an area of 5 10 mm2. Our experiments also indicate that nanofiber pattern selectivity is highly dependent on the separation/size ratio of the pyramidal protrusions with a ratio of
