NDLI: Inlaid Carbon Nanofiber Nanoelectrode Array as Highly Efficient Dielectrophoresis Device for Bacteria Trapping

Content Provider	IEEE Xplore Digital Library
Author	Jun Li Arumugam, P.U. Chen, H. Cassell, A.
Copyright Year	2008
Description	Author affiliation: Dept. of Chem., Kansas State Univ., Manhattan, KS (Jun Li)
Abstract	Dielectrophoresis (DEP) is an effective microelectronic technique for trapping and manipulating biological particles in a microfluidic environment, which relies on the highly asymmetric electric field gradient created by the microelectrodes. Here we demonstrate an AC DEP technique for single-bacteria trapping using nanoelectrode arrays (NEAs) in a "points-and-lid" configuration. The NEA is based on vertically aligned carbon nanofibers (CNFs) embedded in $SiO_{2}$ matrix. The miniaturization of the electrode size provides a highly focused electric field with the gradient enhanced by several orders of magnitude. Finite element modeling indicated that the pDEP force using such NEA-based devices can be increased by over 100 times. Experiments indicated that the bacteria can be trapped instantaneously on to the exposed CNF tip with an AC voltage of ~3 $V_{pp}.$ In most cases, a single E. coli bacterium is trapped at a single CNF site due to the screening effect. Such nano-DEP device allows the integration of millions of nanolectrodes deterministically in lab-on-a-chip devices that can be used for effective cell manipulating and concentration.
Starting Page	826
Ending Page	827
File Size	493322
Page Count	2
File Format	PDF
ISBN	9781424421039
DOI	10.1109/NANO.2008.246
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-08-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arrays Nanobioscience Charge carrier processes Electrodes Microorganisms Force Microfluidics
Content Type	Text
Resource Type	Article

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