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.
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Showing 1 to 20 of 103 for “"Interdigitated"”.
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Microfluidic cancer cell isolation system using magnetic nanoparticle hybrids and advanced interdigitated electrode technology
For the past decade in the biomedical engineering industry, extensive research has been conducted in improving magnetic sensing technologies for cell isolation systems. These technologies, through the popular biomarkers, i.e. DNA, RNA, proteins, antibodies, have already been implemented in clinical …
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Robustness and repeatability of interdigitated electrodes on a substrate tested in an aqueous environment
Interdigitated electrodes are currently being used as sensing components in microfluidic lab-on-a-chip devices. The Daktari Diagnostics system uses these electrodes to measure the change in impedance of a fluid in an assay chamber. In order to improve quality assurance, a new testing method was …
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Design of a micro-interdigitated electrode for impedance measurement performance in a biochemical assay
The performance of interdigitated electrodes for impedance measurements is dependent upon the geometric design of the electrode pattern and can be significantly impacted by manufactured variability or defects. For processes which rely on precise electrode performance, such as the biochemical assay …
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Towards Thick Battery Electrodes and Interdigitated Cell Architectures Via Micro-structured Carbon Nanotube Forests
… energy and power densities of idealized interdigitated CNT-based full cells.
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Comparison of standard impedance spectroscopy response to aqueous metal ions using plain vs. surface derivatized gold interdigitated electrodes
… with CS2 to anchor on the gold surface of an interdigitated electrode (IDE) through a dithiocarbamate linkage, resulting in significant changes in impedance response in the presence of Cu2+ solutions. However, questions regarding the stability of the primary amine-based dithiocarbamate …
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Immobilization of Ru(bpy)(3)(2+) for Electrogenerated Chemiluminescent Sensors and Application of Interdigitated Array Electrodes in Transmission Ft-Ir Spectroscopy
A flow cell of novel design was used to follow the changes occurring in cation-loaded Nafion films in response to variations of the humidity of a nitrogen purge gas flowing through the cell. The structural changes occurring due to the binding of water to these cation-exchanged membranes was …
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Electrochemical sensors for integration on silicon
… for point-of-care analysis. To achieve this, interdigitated micro-electrodes were investigated wherein each comb of electrodes could be biased separately allowing for unique analysis opportunities. Discussed herein simulations of electrode geometries are used to establish the optimum design …
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Manufacturability of lab-on-chip devices : dimensional variation analysis of electrode foils using visual technology
… Daktari CD4 Cell Counter system utilizes an interdigitated electrode foil in order to measure the concentration of the CD4 cells in an assay chamber by measuring the impedance drop. Thus the consistency in the dimensions of the interdigitated fingers in the electrode is critical to the …
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Development of a PDMS Based Micro Total Analysis System for Rapid Biomolecule Detection
… a micropump, micromixer, magnetic separator and interdigitated electrodes for impedance detection. Three designs of pneumatically actuated PDMS based micropumps were fabricated and tested. Based on the performance test results, one of the micropumps was selected for integration. The experimental …
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Investigations of the optoelectronic behaviour of novel phthalocyanine Langmuir-Blodgett films.
… glass and gold plated glass, and on quartz with interdigitated platinum electrodes. Optical absorption spectra are obtained for the materials, and the linear relation between the absorption intensity and thickness confirmed. The variation in optical absorption with polarisation and angle of …
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Voltage programmable diffraction grating device
… tin oxide electrodes. The pattern of electrodes (interdigitated electrodes) was produced by standard photolithography techniques and the average distance between the electrodes plus the gap between the electrodes (p) that were produced in different devices were 10μm, 20μm, 40μm, 80μm, 160μm, 240μm …
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Reexamining the role of linker histones beyond 30 nm fibers in a complex chromatin environment
… Instead, chromatin appears to be composed of an interdigitated 10 nm fibers in both repressive and accessible chromatin types. The role of linker histones in 10 nm fibers is not well characterized. Previous work showed that linker histones stabilized 30 nm structures, rendering them inaccessible …
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A combined microfluidic/dielectrophoretic microorganism concentrator
… for pathogen detection applications. Interdigitated electrodes lining the bottom of the channel use positive dielectrophoretic forces to trap particles. A passive mixer is used to circulate the liquid in the channel, transporting particles to within the trapping region of the …
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Advancing Health and non-Health Security, Diplomacy and International Relations through the Enlightened Design and Delivery of Smart Global Health Programs
… as addressed in the following, such synergistic, interdigitated and smart approaches are also in play. In all such cases, such enlightened approaches are the hallmark of enlightened human evolution.
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Optimizing mixer geometries for dielectrophoretic micro-concentrators
Dielectrophoretic (DEP) force, generated by interdigitated electrodes (IDEs), has been utilized to capture bio-particles for microfluidic concentration. However, due to the localized DEP force, DEP-based ,/ -concentrators usually have shallow channels and thus are operated under low flow rates. In …
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Fabrication and Optoelectronic Characterization of Nanoscale Resonance Structures
… Yagi-Uda array, and a metasurface inspired interdigitated structure. Experimental devices containing the nanoscale resonance structures were fabricated on semiconducting substrates forming metal-semiconductor-metal photodiodes. The spectral response of the nanoscale resonance photodiode was …
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Terahertz-Strahlung auf der Basis beschleunigter Ladungsträger in GaAs
… carriers in semiconductor substrates. A metallic interdigitated structure at the surface of semi-insulating GaAs provides the electrodes of an Auston switch. In a biased structure photoexcited charge carriers are accelerated. Hence electromagnetic waves are emitted. An appropriately structured …
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Influence Of Applied Potential And Metal Ion Concentraion On Metal Electrodeposition At Micron Gap Gold Electrodes
… to a second set of electrodes (E2) of an Au interdigitated array of electrodes with a 5 µm separation. However, when different metals were deposited, they deposited in different fashions. Ag grew in the form of wires and Palladium deposited in the form of dendrites. Here we investigated the …
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Microfluidic Electrical Impedance Spectroscopy
… cell cultures. Tocharacterize this, an interdigitated array of electrodes was patterned over glass, where it was then bonded to a series of fluidic networks created in PDMS via soft lithography. The device measured ethanol impedance initially to show that values remain consistent over …
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Enhanced condensation with active methods
… and improve heat transfer coefficients. Interdigitated electrode patterns were fabricated on piezoelectric LiNbO3 wafers and SAW waves were generated with RF voltages in the 12.5 - 100 MHz regime. These were tested in the in-house condensation rig with Ethanol, Pentane, Hexane and …
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