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 12 of 12 for “"Four-probe"”.
-
Mobility and Saturation Velocity in Graphene on Silicon Dioxide
… graphene samples on SiO2 are examined from four-probe electrical measurements combined with electrical and thermal modeling. Data are analyzed with practical models including gated carriers, thermal generation, “puddle” charge, and Joule heating. Graphene mobility is characterized as a …
-
Characterization of Magic-angle Twisted Bilayer Graphene using Microwave Techniques
… DC-microwave circuit, which integrates a DC four-probe measurement and microwave resonator readout functionalities, enables the investigation of DC transport response and microwave response in the same twisted bilayer graphene device. By measuring the frequency shift of a standard Aluminum …
-
Molecular composites of a conducting polymer: syntheses and characterization of poly(1,4-phenylenevinylene)-crown ether rotaxanes
… of the PPV rotaxanes were measured by the four-probe method. The conductivities of PPV42C14 rotaxane and PPV60C20 rotaxane were found to be 1.06x10⁻⁵ S/cm and 2.0x10⁻⁹ S/cm, respectively, after doping with concentrated sulfuric acid. The photoluminescence spectra of PPV rotaxanes showed …
-
Scanning electron microscope technique for measuring electrical conductivity: Application to tetrathiafulvalene-tetracyanoquinodimethane
… The influence of contact inhomogeneities on four-probe measurements of the temperature dependence of the £-axis conductivity as determined with an electrolytic tank model are also presented. It is found that there is a large probability of slightly underestimating conductivity, but that it is …
-
Nanoscale Thermal Fluctuation Spectroscopy
… material and a standard measurement method, i.e. four-probe collinear resistivity technique. The advantages to this new experimental technique include the elimination of any required thermal or potential gradients, multi-transport property measurements within one experiment, very low error and the …
-
Fabrication and Characterization of Superconducting Core Fibers with Fused Silica Cladding
… of the Pb core was verified by a custom designed four-probe technique in liquid helium. The YBCO core was also confirmed to be superconductive after heat treatment with O₂ present. The feasibility of efficient cooling by the holey glass tubes was confirmed. A 1-D single-phase steady state model …
-
Investigations into b-o defect formation-dissociation in cz-silicon and their effect on solar cell performance
… such as laser beam induced current (LBIC), Four-Probe electrical resistivity etc. to better understand the light induced degradation (LID) effect in silicon solar cells. All the measurements are performed as a function of light soaking time. Annealed states are produced by exposing the …
-
FEXOFENADINE AND ORGANIC ANION TRANSPORTING POLYPEPTIDES (OATPs): TRANSPORT AND DRUG-DRUG INTERACTIONS
… suggesting this drug could be used as a probe of transporter activity. When fexofenadine was administered in combination with four drugs (buspirone, caffeine, dextromethorphan and losartan) used to probe cytochrome P450 (CYP) activities, a significant decrease in fexofenadine AUC was …
-
Study of superconducting fault current limiters in power systems
… and in-depth research on SFCLs and there are four new findings in this work. Firstly, we use four-probe methods to identify the best hierarchical structure for the 2G HTS YBCO tapes used for SFCL device in order to improve the fault current limiting effect. Three commercially available YBCO …
-
Oxygen Transport Membrane Reactors for Oxy-Fuel Combustion and Carbon Capture Purposes
… (SEM), and conductivity testing using a four-probe method, respectively. Oxygen permeation tests study the oxygen permeability OTMs under modified membrane temperatures, sweeping gas flow rates, sweeping gas compositions, membrane configurations, and membrane compositions. When utilizing …
-
Ceramic-Based Anodes for Solid Oxide Fuel Cells
… LSGMn has a pure single primitive cubic phase. Four-probe DC conductivity characterization indicates that GNC method is effective to synthesize single-phase perovskite LSGMn with relatively high electronic conductivity. The conductivity of the sintered LSGMn samples is lower in H2 than that in …
-
Development of a new test protocol for the permit Ion migration test
… the new Permit ion migration test and the Wenner four probe resistivity test. The results from these investigations were used to establish the validity of the Permit ion migration test for testing concretes containing supplementary cementitious materials and to improve its test protocol. …