Characterization of the distribution of rotational torque on electrorotation chips with 3D electrodes

2015-08-01
Bahrieh, Garsha
Ozgur, Ebru
Koyuncuoglu, Aziz
Erdem, Murat
Gündüz, Ufuk
Külah, Haluk
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
143
views
0
downloads
This is a study of in-plane and out-of-plane distribution of rotational torque (ROT-T) and effective electric field (EEF) on electrorotation (ER) devices with 3D electrodes using finite element modeling (FEM) and experimental method. The objective of this study is to investigate electrical characteristics of the ER devices with five different electrode geometries and obtain an optimum structure for ER experiments. Further, it provides a comparison between characteristics of the 3D electrodes and traditionally used 2D electrodes. 3D distributions of EEF were studied by the time-variant FEM. FEM results were verified experimentally by studying the rotation of biological cells. The results show that the variations of ROT-T and EEF over the measurement area of the devices are considerably large. This can potentially lead to misinterpretation of recorded data. Therefore, it is essential to specify the boundaries of the measurement area with minimum deviation from the central EEF. For this purpose, FE analyses were utilized to specify the optimal region. Thereby, with confining the measurements to these regions, the dependency of ROT-T on the spatial position of the particles can be eliminated. Comparisons have been made on the sustainability of the EEF and ROT-T distributions for each device, to find an optimum design. Analyses of the devices prove that utilization of the 3D electrodes eliminate irregularities of EEF and ROT-T along the z-axis. The Results show that triangular electrodes provide the highest sustainability for the in-plane ROT-T and EEF distribution, while the oblate elliptical and circular electrodes have the lowest variances along the z-axis.
Cell dielectric characterization, Electrorotation, Rotational torque, Rotating electric field, 3D electrodes
https://hdl.handle.net/11511/30578
ELECTROPHORESIS
Graduate School of Natural and Applied Sciences, Article

Suggestions

Investigation of Mechanical Properties and the Electronic and Magnetic Behavior of Silver-Based Ferrite Chalcogenides Ag3FeCh4 (Ch = S and Se).
Sürücü, Gökhan (2020-09-01)
In this study, to obtain the mechanical properties and the electronic and magnetic behavior of silver-based ferrite chalcogenides Ag3FeCh4 (Ch = S and Se), first principles computations within generalized gradient approximation have been performed. They conform P4 ̅3m space group with 215 space number which have sulvanite type simple cubic structure. At the beginning, in order to determine most suitable magnetic order, A, C and G type antiferromagnetic (AFM) and ferromagnetic (FM) phases have been considere...
Characterization of cross-coupling in capacitive micromachined ultrasonic transducers
Bayram, Barış; Yaralioglu, GG; Oralkan, O; Lin, DS; Zhuang, XF; Ergun, AS; Sarioglu, AF; Wong, SH; Khuri-Yakub, BT (2005-01-01)
This paper analyzes element-to-element and cell-to-cell cross-coupling in capacitive micromachined ultrasonic transducers (cMUTs) using an interferometer. In a 1-D linear cMUT array immersed in oil, a single element was excited, and membrane displacements were measured at different positions along the array with an interferometer. Electrical measurements of the received voltage on each array element were also performed simultaneously to verify the optical measurements. The array was then covered with a poly...
Modeling and design of iron-core shunt reactors with discretely distributed air-gaps
Dönük, Atilla; Ermiş, Muammer; Bilgin, Hazım Faruk; Department of Electrical and Electronics Engineering (2012)
In this research work detailed parallel and series equivalent circuits of a gapped iron-core shunt reactor with discretely distributed gaps are derived. The validity of the recommended equivalent circuits is verified by Finite Element Analysis and laboratory tests. Effects of fringing flux and discretely distributed gaps on inductance parameters and reactor losses are also investigated. Moving Strip Method for discretely distributed gapped shunt reactors is recommended. Two design procedures for shunt react...
Analysis of slot coupled microstrip patch antennas
Ballıkaya, Elif; Aydın Çivi, Hatice Özlem; Department of Electrical and Electronics Engineering (2007)
Method of Moments (MoM)/Green’s function formulation is developed for the analysis of electromagnetic radiation from planar rectangular microstrip antennas with different feeding techniques. Investigated structures are microstrip line fed patch antenna, proximity coupled patch antenna and slot coupled patch antenna. For all these structures equivalent problems are defined. Then, integral equations where currents are the unknowns are obtained from boundary conditions and by using spectral domain representati...
Analysis of Field-Effect Passivation in Textured and Undiffused Silicon Surfaces
Turkay, Deniz; Koroglu, Cagil; Yerci, Selçuk (2019-09-13)
In this work, we present a numerical analysis comparing the field-effect passivation provided by fixed dielectric charges on planar and textured undiffused silicon surfaces. We focus particularly on the ratio of effective surface recombination velocities (S-eff) of planar and textured surfaces (sigma=S-eff,S-textured/S-eff,S-planar) utilizing the same fixed dielectric charge density (Q(f)) under the same injection conditions. To ensure a difference between the space-charge region profiles of textured and pl...
Citation Formats
G. Bahrieh, E. Ozgur, A. Koyuncuoglu, M. Erdem, U. Gündüz, and H. Külah, “Characterization of the distribution of rotational torque on electrorotation chips with 3D electrodes,” ELECTROPHORESIS, pp. 1785–1794, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30578.
METU IIS - Integrated Information Service open@metu.edu.tr