Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"Dielectrophoresis (DEP)"”.
-
A novel method for the continuous separation of microorganisms based on electrical properties
… phenotypes. Iso-dielectric separation uses dielectrophoresis (DEP) and media with spatially varying conductivity to separate cells based upon their effective conductivity. Our target application is the separation of Escherichia coli based upon the amount of the intracellular polymer …
-
Cell patterning technology for controlling the stem cell microenvironment
… of our first cell patterning technology using dielectrophoresis (DEP). DEP uses nonuniform electric fields to trap cells on or between electrodes. We first used beads as model particles to validate the strength of our DEP square trap, and then demonstrated efficient cell patterning with …
-
Coupled Molecular Dynamics and Finite Element Methods for the simulation of interacting particles and fields
… interactions: i.e. exploiting the so called dielectrophoresis (DEP) phenomena in the systems of electromechanical particles (EMPs). This is the specific case of study here considered, but in principle the methodology can applied after suitable adaptation to also other systems.
-
Design, Fabrication, Testing of CNT Based ISFET and Characterization of Nano/Bio Materials Using AFM
… to be aligned inside a single nanochannel by Dielectrophoresis (DEP) and the drain current is improved greatly due to CNTs` remarkable and unique electrical properties, for example, high current carrying capacity. ISFET structures with or without CNTs are fabricated and tested with different …
-
Embedded Passivated-Electrode Insulator-Based Dielectrophoretic Chromatography
… method of manipulating particles in this way is Dielectrophoresis (DEP), which is the use of varied electric fields gradients to generate a force on small particles. The strength of DEP depends of the properties of the particle medium, the signal generating the electric field, and the properties …
-
Continuous dielectrophoretic separation of colloidal particles
Dielectrophoresis (DEP) is a technique that can be used to separate particle at microscale. It is of particular interest because it is a non-invasive, non-destructive and non-contact technique, which ensures that sample composition remains the same with only the particles being separated. On the …
-
The development of an automated system for electrical characterization of cells using a novel force balance method
Dielectrophoresis (DEP), a cell separation technique based on the dielectric properties, has significantly advanced biomedical research in diverse applications ranging from blood stem cells purification to cancer cells isolation from heterogeneous populations. The ability to accurately measure the …
-
Passivated-Electrode Insulator-Based Dielectrophoretic Chips for Rare Cell Analysis
… for the analysis of cells is the use of dielectrophoresis (DEP) forces for the manipulation of particle movement. DEP is a particle transport phenomenon, induced by the presence of non-uniform electric fields. The dependence on intrinsic electrical properties of cells, have enabled DEP …
-
A passive microfluidic device for continuous buffer exchange
Generally, dielectrophoresis (DEP) analysis of biological cell samples relies on the differing electrical parameters between the cells and the surrounding fluid medium. To achieve effective positive DEP manipulation and sorting of mammalian cells in suspension, it is required to resuspend the cells …
-
Parallel Fabrication and Transport Properties of Carbon Nanotube Single Electron Transistors
… is based on the assembly of individual SWNTs via dielectrophoresis (DEP) at the selected position of the circuit and formation of tunnel barriers on SWNT. Two different techniques: i) metal-SWNT Schottky contact, and ii) mechanical templating of SWNTs were used for tunnel barrier creation. Low …
-
A dielectrophoretic, microfluidic device for sorting lipid-producing organisms used as bio-oil sources
… a heterogeneous population. The device utilizes dielectrophoresis (DEP) to simultaneously sense and sort individual cells based on their internal lipid content. Microorganisms such as yeast, algae, and bacteria produce high fractions of neutral lipids as part of normal metabolism, and are being …
-
Lab on a chip rare cell isolation platform with dielectrophoretic smart sample focusing, automated whole cell tracking analysis script, and a bioinspired on-chip electroactive polymer micropump
Dielectrophoresis (DEP), an electrokinetic force, is the motion of a polarizable particle in a non-uniform electric field. Contactless DEP (cDEP) is a recently developed cell sorting and isolation technique that uses the DEP force by capacitavely coupling the electrodes across the channel. The cDEP …
-
Dielectrophoresis study of electroporation effects on dielectric properties of biological cells
… this phenomenon. In this thesis we introduce a dielectrophoresis (DEP) based technique to study changes in the cytoplasm conductivity of single Chinese hamster ovary (CHO) cells immediately after electroporation. Using a microfluidic chip, we study changes in the DEP response of single CHO cells …
-
Multiphysics-based Fluidic Manipulation of Particles: An Experimental and Numerical Study
… both electric and magnetic driving mechanisms, dielectrophoresis (DEP) and magnetophoresis (MAP) were considered. The arbitrary Lagrangian-Eulerian (ALE) method coupled with Maxwell stress Tensor (MST) approach was applied to solve the particle-fluid-field interaction problem, in which the …
-
Electrical-phenotyping of the bacterial envelope using microfluidics
… manner that can be distinguished by microfluidic dielectrophoresis (DEP). The three-dimensional insulator-based dielectrophoresis (3DiDEP), a microfluidic technique previously reported by our group, was optimized to explore the diverse surface phenotypes of bacterial electrochemical activity and …
-
A Computer-Aided Framework for Cell Phenotype Identification, Analysis and Classification
… various phenotypic traits of these cells in the Dielectrophoresis (DEP) based microfluidic device experimental setup and subsequently classifying the cells from the rest. A general framework for automatic labeling, identifying and classifying the malignant from the dead cells is developed in this …
-
Marker-Free Isolation and Enrichment of Rare Cell Types Including Tumor Initiating Cells through Contactless Dielectrophoresis
… types based on their electrical signatures using dielectrophoresis (DEP) without having direct contact between the electrodes and the sample, known as contactless dielectrophoresis (cDEP). DEP is the motion of a particle in a suspending medium due to its polarization in the presence of a …
-
Single cancer cell detection with optofluidic intracavity spectroscopy
… also did some initial exploration on combining dielectrophoresis (DEP) with the OFIS technique. Since then, some revisions to the fabrication technique have been made to improve the alignment, bonding and sealing of this microfluidic chip. In addition, new DEP electrode designs have been …
-
A microfluidic approach for the initiation and investigation of surface-mediated signal transduction processes on a single-cell level
… management of individually addressable cells, a dielectrophoresis (DEP)-based microfluidic system was employed that provides the manipulation of microscale objects with very high spatiotemporal precision and without the need of contacting the cell membrane. The system offers a high potential for …
-
Study of antimicrobial and antioxidant properties of new materials for development of active food packaging
… Firstly, a microfluidic device combining dielectrophoresis (DEP) and Raman spectroscopy was developed for a fast and dynamic characterization of different bacterial strains, including food-related pathogens (i.e. E. coli and S. aureus), directly in planktonic suspension. Predictive models …
Page 1 of 2