Electromagnetic micropores: Fabrication and operation

Joseph R. Basore, Nickolay V. Lavrik, Lane A. Baker

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We describe the fabrication and characterization of electromagnetic micropores. These devices consist of a micropore encompassed by a microelectromagnetic trap. Fabrication of the device involves multiple photolithographic steps, combined with deep reactive ion etching and subsequent insulation steps. When immersed in an electrolyte solution, application of a constant potential across the micropore results in an ionic current. Energizing the electromagnetic trap surrounding the micropore produces regions of high magnetic field gradients in the vicinity of the micropore that can direct motion of a ferrofluid onto or off of the micropore. This results in dynamic gating of the ion current through the micropore structure. In this report, we detail fabrication and characterize the electrical and ionic properties of the prepared electromagnetic micropores.

Original languageEnglish
Pages (from-to)19239-19244
Number of pages6
JournalLangmuir
Volume26
Issue number24
DOIs
StatePublished - Dec 21 2010

Funding

FundersFunder number
National Science Foundation0847642

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