We show that a triaxial atomic force microscopy probe creates a noncontact trap for a single particle in a fluid via negative dielectrophoresis. A zero in the electric field profile traps the particle above the probe surface, avoiding adhesion, and the repulsive region surrounding the zero pushes other particles away, preventing clustering. Triaxial probes are promising for three-dimensional as...

The precise placement of single-walled carbon nanotubes SWCNTs in device architectures by ac dielectrophoresis involves the optimization of the electrode geometry, applied voltage and frequency, load resistance, and type of nanotube sample used. The authors have developed a toolkit to controllably integrate SWCNTs in device structures by the use of floating potential metal posts and appropriate...

152 Finite Element Method Analysis of Microfluidic Channel with Integrated Dielectrophoresis Electrodes for Biological Cell Permeabilization and Manipulation V. Novickij , A. Grainys , J. Novickij 2 Department of Electrical Engineering, Faculty of Electronics, Vilnius Gediminas Technical University, Naugarduko street 41, Vilnius LT-03327, Lithuania, e-mail: [email protected] High Magneti...

Single-walled carbon nanotube (CNT) gas sensors were fabricated by dielectrophoresis onto microelectrodes made of Cr, Pd or Al. The Al/CNT sensor response to NO2 (nitrogen dioxide) gas was characterized by fast and large resistance increase at the moment of NO2 exposure, whereas the resistance of the other metal/CNT sensors monotonously decreased. It was suggested that the adsorbed NO molecules...

We demonstrate three-dimensional directed assembly of single-wall carbon nanotubes (SWNT) into porous alumina nanotemplates on silicon substrates by means of electrophoresis and dielectrophoresis at ambient temperatures. Assembled SWNT provided an interconnection between the surface and base of the nanotemplate. I-V measurements clearly show that the connection between silicon and SWNT is estab...

Here we show the design and implementation of a microfabricated platform for screening the effects of electric fields on mammalian cells. Specifically, we have screened for electric field conditions that are commonly used in the manipulation of cells using dielectrophoresis. To assay the physiological state of the cells, we constructed and cloned a stress-reporting cell line. Results obtained w...

A broadband beam steering device using the dielectrophoresis-tilted prism of liquids is demonstrated. Dielectric force is utilized to slant the interface to imitate the refractive behavior of a prism. The steering angle increases as the applied voltage increases. Two dimensional beam steering is also successfully achieved by stacking two devices in orthogonal positions. The broadband feature is...

As a complementary tool to nanofluidics, biomolecular-based transport is envisioned for nanotechnological devices. We report a new method for guiding microtubule shuttles on multi-walled carbon nanotube tracks, aligned by dielectrophoresis on a functionalized surface. In the absence of electric field and in fluid flow, alignment is maintained. The directed translocation of kinesin propelled mic...

! r U = r f ( r E ) . In electrolytes, such effects of induced-charge electrophoresis (ICEP) occur in addition to the purely electrostatic effect of dielectrophoresis (DEP) in low-frequency AC fields (< 100 kHz), where there is enough time for diffuse-charge relaxation around the particle within each period. ICEP is a complex phenomenon, which can lead not only to nonlinear mobility (in the fie...

Aim: to study the possibilities of using electrical and viscoelastic parameters erythrocytes differentiate steatohepatitis from liver steatosis. Patients Methods: 84 men (48.9±2.5 years) with fatty disease diagnosed by abdominal ultrasound were examined. Liver fibrosis severity, which did not exceed grade 1, was determined indirect elastometry on FibroScan® 502 Echosens device (France), confirm...