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Showing 1 to 20 of 28 for “"Capacitance measurements"”.
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Quantitative capacitance measurements using a scanning probe microscope
… which an atomic force microscope with scanning capacitance microscopy (SCM) capability can be employed in a nontraditional fashion to quantitatively measure the capacitance of metal-oxide-semiconductor (MOS) structures. The capability to deduce sample capacitances is based on resonant frequency …
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Quantum capacitance measurements of single-layer molybdenum disulfide
… fabricated with the goal of measuring quantum capacitance and probing the transition metal dichalcogenide's density of states. In the final devices, no modulation of the quantum-capacitance was observed due to large Schottky barriers between the metal contacts and the molybdenum disulfide. …
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Thermodynamic and tunneling measurements of van der Waals heterostructures
… of two measurement techniques towards this goal: capacitance measurements that probe the thermodynamic ground state of an electronic system and planar tunneling measurements that access its quasiparticle excitation spectrum. Both techniques were applied to van der Waals materials, a class of …
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ΗΛΕΚΤΡΟΔΙΕΠΙΦΑΝΕΙΑΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΕΤΡΑΥΠΟΚΑΤΕΣΤΗΜΕΝΩΝ ΦΩΣΦΩΝΙΟΚΑΤΙΟΝΤΩΝ ΣΤΗ ΔΙΑΦΑΣΙΚΗ ΠΕΡΙΟΧΗ ΥΔΡΑΡΓΥΡΟΥ/ΔΙΑΛΥΜΑΤΟΣ ΣΕ ΜΕΘΑΝΟΛΙΚΑ ΗΛΕΚΤΡΟΛΥΤΙΚΑ ΣΥΣΤΗΜΑΤΑ
… THE EXPERIMENTAL WORK WAS BASED ON DIFFERENTIAL CAPACITANCE MEASUREMENTS BY PHASE SELECTIVE A.C. POLAROGRAPHY FOR THE ADSORPTION OF [MEPH3P]+, [BUPH3P]+, [PGPH3P]+, [CPRPH3P]+, [VPH3P]+, [PH4]+ CATIONS FROM METHANOLIC SOLUTIONS AT THE DROPPING AND HANGING DROP MERCURY ELECTRODE. THE ADSORPTION …
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Silicon-based pH sensor for biological and environmental applications
… We were not able to obtain consistent capacitance measurements for a particular pH solution. For some solutions we had extremely large variances in capacitance, yielding “noisy” measurements. However, in retrospect, there are many improvements that could be made to our device and …
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Correlation of the distribution curve with the dispersion curve of cellulose nitrate
… The parallel resistance method is used for capacitance measurements is a nickel cell. Comparison of the distribution curve and the dispersion curve above a distinct similarity between the two curves. A relationship of the log frequency to intrinsic viscosity has been derived and appears to …
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Cell coupling and exocytosis measured in intact mouse pancreatic islets Control of {delta}-cell secretion
Patch-clamp and capacitance measurements were applied to α-, β- and δ-cells in intact mouse pancreatic islets. The maximum rate of β-cell exocytosis during a depolarization to 0 mV was 14 granules/s, <5% of that observed in isolated β-cells. β-cell exocytosis exhibited bell-shaped voltage …
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Nature of Large Vesicle Exocytosis in Pancreatic β-cells: Release of ATP and GABA
… electrophysiological techniques such as measurements of cell membrane capacitance and amperometry are used to detect exocytotic events. A novel method was developed in this study based on the expression of P2X2 receptor channel in secreting cells. The presence of ATP sensitive channel on …
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Properties of Nanoscale Biomaterials for Cancer Detection and Other Applications
… was observed [1]. Techniques for measuring the capacitance and resistivity of various ISAM films have also been developed allowing for a more complete electrical characterization of ISAM films. Capacitance measurements enabled a calculation of the dielectric function and breakdown field strength …
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Electrochemical and spectroscopic analysis of collagen films and lipid bilayers on biomaterial surfaces
… protein and gold as the substrate material. Capacitance measurements, polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), surface plasmon resonance spectroscopy (SPR) and ellipsometry are employed to analyze the stability and structure of adsorbed collagen films. …
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Characterization of tellurium back contact layer for CdTe thin film devices
… to devices without Te. In current - density measurements, Te shows stability even at low temperatures, which is indicative of a low barrier developed at the CdTe/Te interface. X-ray and ultra-violet photoelectron spectroscopy were carried out to examine the valence band offset at the CdTe/Te …
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The Impact of Calcium Binding Protein 5 (CaBP5) on Synaptic Vesicle Dynamics in Rod Bipolar Cells in the Retina
… at the presynaptic RBC terminals. Using membrane capacitance measurements in the acutely isolated RBCs, we found that the total number of fusion-competent vesicles in RBCs was not different between CaBP5⁻/⁻ and wild-type mice. However, CaBP5-/- RBCs showed a greater rise in membrane capacitance in …
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Vertical gallium nitride power devices on bulk native substrates
… Switching characteristics are investigated by capacitance measurements. The thesis concludes with the demonstration of spalling off the bulk GaN substrate after device fabrication. Thanks to the substrate spalling technology, the on resistance of the device can be further reduced and the bulk …
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Resistive heating for self-healing materials based on ionomeric polymers
… healing. Damage detection using capacitive measurements is demonstrated and characterized. The self-healing composite is placed on top of another conductive material such as in the wire insulation application. Capacitance measurements are made using the conductive network inside the …
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Design, Fabrication, and Validation of Membrane-Based Sensors
… used to form bilayers within the sealed device. Capacitance measurements of the encapsulated bilayer show that the sealing cap slightly compresses the bottom insert and reduces the size of the enclosed bilayer. Single channel measurements of alamethicin peptides further verify that the …
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A Study of coherent noise in binary Read-Out Systems and its applications to the ATLAS SemiConductor Tracker end-Cap
… contribute to total noise mainly via their capacitance. Capacitance measurements on silicon micro-strip detectors are described. A detailed description of the effects of noise on the SCT modules with binary readout is given. Methods to measure common mode noise in binary readout systems are …
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Quantum transport in graphene heterostructures
… probe isospin ordering in bilayer graphene using capacitance measurements.
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Transfer Properties of the Hair Cell-Afferent Fiber Synapse
… techniques, including whole-cell recordings, capacitance measurements, and iontophoresis. Glutamate is released from hair cells in response to Ca<sup>2+</sup> influx through L-type Ca<sup>2+</sup> channels and is detected by AMPA receptors in postsynaptic fibers. Gradations in the extent of …
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Development of low-temperature solution-processed colloidal quantum dot-based solar cells
… characteristics, optical modeling, and capacitance measurements, the combined diffusion length and depletion width in the PbS QD layer is found to be approximately 170 nm. In the organic/inorganic hybrid device, poly(3-hexylthiophene-2,5-diyl) (P3HT) nanofibers and CdS QDs were employed …
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