Three-dimensional dielectrophoresis with dielectric pillar arrays fabricated by soft lithography

Ryo Watabe, Satoshi Uchida, Hiroyuki Nishikawa

Research output: Contribution to journalArticlepeer-review


We studied 3D dielectrophoretic (DEP) effects induced by dielectric pillar arrays fabricated by soft lithography. Polydimethylsiloxane (PDMS) was casted onto a PMMA mold with arrays of high-aspect-ratio holes micromachined by proton beam writing (PBW), which is a novel direct-write lithographic technique using a scanning proton beam. Arrays of PDMS pillars with diameter of ∼3 μm and a height of ∼15 μm, were fabricated using the soft lithography. The 3D-DEP effect was demonstrated using the PDMS pillar arrays incorporated into a channel on a glass substrate by measuring a trapping capability of E. coli. Coupled use of the soft lithgraphy with the PBW enables us to fabricate low-cost 3D-DEP devices with improved throughput.

Original languageEnglish
Pages (from-to)548-552
Number of pages5
JournalIEEJ Transactions on Fundamentals and Materials
Issue number9
Publication statusPublished - 2015 Sept 1


  • Dielectrophoresis
  • Proton beam writing
  • Soft lithography

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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