dielectrophoresis – Page 3 – TechConnect Briefs

Precision Placement and Integration of Individual Carbon Nanotubes in Nanodevices by Fountain-Pen controlled Dielectrophoresis

Schwamb T., Schirmer N., Poulikakos D., ETH Zürich, CH

Herein, we present a novel fabrication method for the integration of special nanoparticles such as nanowires and carbon nanotubes into NEMS/MEMS. To this end, we combined the dielectrophoretic deposition of carbon nanotubes with a fountain-pen [...]

Noise-Differential Based Detection of Cells on a Microelectronic Sensor/Actuator Array

Manaresi N., Lanzetta F., Romani A., Medoro G., Guerrieri R., Silicon Biosystems spa, IT

We present a new method to count cells on a microelectonic lab-on-a-chip integrating an array of Dielectrophoretic (DEP) cages and embedded optical sensors. Cells are trapped by DEP cages above photodiodes measuring the optical near [...]

Microfluidic electromanipulation with capacitive detection for cell diagnostic applications

Ferrier G.A., Hladio A.N., Thomson D.J., Bridges G.E., Hedayatipoor M., Olson S., Freeman M., University of Manitoba, CA

We are proposing an all-electrical approach to mechanical cell diagnostics that uses a combination of electromanipulation for stimulus and capacitance for sensing. We have successfully used the capacitive sensor to detect the electrical trapping (using [...]

Gold Nanoparticle Super Assembly by Dielectrophoresis

Gierhart B.C., Collins S.D., Howitt D.G., Chen S.J., Smith R.L., University of California Davis, US

Dielectrophoretic assembly of nanoparticles has great utility in creating intricate designer nanoscale structures. Despite their utility, little is known about the mechanisms that govern different assembly morphologies. The magnitude and frequency of the applied field, [...]

Single Walled Carbon Nanotubes based Three Dimensional Flexible Electronics

Makaram P., Selvarasah S., Chen C., Busnaina A., Dokmeci M.R., Northeastern University, US

Single Walled Carbon Nanotubes (SWNTs) with their superior electrical and mechanical properties are very strong candidates for future electronic applications. CMOS electronics are constantly being scaled down to accommodate more devices. Alternative device geometries are [...]

Adaptive temperature estimation in 3D single-cell dielectrophoretic traps using the boundary Element Method

Rosales C., Institute of High Performance Computing, A*STAR, SG

Application of dielectrophoresis techniques to biological particles is limited by the temperature increase of the suspension due to Joule heating. This temperature increase can be obtained from a Poisson equation, but the presence of the [...]

Dielectrophoretic ratchets for linear and rotary nanomotors

Hughes M.P., Astumian R.D., University of Surrey, UK

Dielectrophoresis (DEP) is a phemomenon of induced particle motion in non-uniform electric fields. In this paper, we will describe how the phenomenon can be used to design electrokinetic ratchet devices to provide both linear and [...]

Microfluidic Device for Conventional and Traveling-Wave Dielectrophoresis

Kumar A., Acrivos A., Khusid B., James C.D., New Jersey Institute of Technology, US

Conventional and traveling-wave dielectrophoresis in suspensions are proven techniques for the manipulation, separation, and characterization of suspended particles with potential applications ranging from biological warfare agent detection to healthcare industry. In contrast to previous studies, [...]

A Continuous Particle/Cell Sorter Using Dielectrophoresis

Wang G.R., Feng J.J., Vasantgadkar S., Pant K., Prabhakarpandian B., Krishnamoorthy S., Sundaram S., CFD Research Corporation, US

We present a novel design of a continuous microfluidic sorter for separation of cells or particles by the intelligent use of conventional negative dielectrophoresis with separation efficiency of greater than 95%. A high fidelity modeling [...]

Electric Field Driven Motion of Flexible Polyelectrolytes – A Molecular Dynamics Study

Lo T.S., Khusid B., Acrivos A., Koplik J., New Jersey Institute of Technology, US

Our work aims to develop multi-scale computational procedures for simulating the dielectrophoretic behavior of biomolecules in micro- and nano-electrofluidics, which combine electrohydrodynamics with molecular theories for the macromolecule polarization caused by the distortion of the [...]