Scanning capacitance microscopy is used to characterize the electronic properties of ErAs nanoparticles embedded in GaAs pn junctions grown by molecular beam epitaxy. Voltage-dependent capacitance images reveal localized variations in subsurface electronic structure near buried ErAs nanoparticles at lateral length scales of 20-30 nm. Numerical modeling indicates that these variations arise from...

the ac electrical behaviour of nano porous silicon (psi) with tio2 thin films was examined over the range of frequency 102 to 105 hz. porous silicon (psi) layers were obtained by electrochemical etching in hf solution and tio2 thin films were deposited on psi substrates by using electron beam evaporation technique at room temperature. the porosity of psi layer was found by using the gravimetric...

Alternating current measurements in biology are concerned with the resistance and capacitance of the cell membrane, and the resistance of the cell interior. No systematic electrical measurements have so far been made on the cell nucleus. Such expressions as resistance, capacitance and impedance are generally associated with wireless sets or wireless components. They have, however, a physico-che...

We describe here a technique called phase tracking that greatly improves the accuracy of measurements of the membrane capacitance of single cells. We have modified the original phase detection technique to include a method for creating calibrated changes in the resistance in series with the cell. This provides a method to automate the adjustment of the phase detector to the appropriate phase an...

Ruthenium oxide±carbon composites with different loadings of RuO2 on carbon have been synthesized by an electroless deposition process. Increase in RuO2 loading results in increasing the speci®c capacitance of the composite electrode. The effect of temperature treatment on the performance of these materials has been studied in detail. Maximum capacitance was observed after heat treatment at 100...

A circuit is described that has applications for micro scale capacitance tomography. The circuit has been developed for use with linear arrays of rectangular electrodes measuring between 10μm-100μm and integrated onto a silicon chip. Simulations suggest that the circuit is capable of measuring very small capacitance changes of the order of tens of atto-farads. The circuit also features a small ...

We investigate the problem of decoupling capacitance allocation for power supply noise suppression at floorplan level. First, we assume that a floorplan is given, and consider the decoupling capacitance placement as a post-floorplan step. Second, we consider the decoupling capacitance placement as an integral part of a floorplanning methodology (noise aware floorplanning). In both cases, the ob...

In this work, capacitance and technology scaling is used for further reduction in IOs power. On 40nm technology and 10 GHz operating frequency, there is 4.59%, 9.38%, 13.97% and 18.76% reduction in IOs power when capacitance change from 5pF to 4pF, 3pF, 2pF and 1pF respectively. On 28nm technology and 10 GHz operating frequency, there is 5.54%, 11.32%, 16.86%, and 20.72% reduction in IOs power ...

Scanning Impedance Microscopy (SIM) is one of the novel scanning probe microscopy (SPM) techniques, which has been developed to taking image from sample surface, providing quantitative information with high lateral resolution on the interface capacitance, and investigating the local capacitance–voltage (C–V) behavior of the interface and AC transport properties. The SIM is an ordinary AFM equip...

The purpose of decoupling capacitors on printed circuit boards is to meet the instantaneous current demands of high-speed active devices while minimizing power bus noise. Embedded capacitance is an alternative to discrete decoupling capacitors and is achieved by taking advantage of the natural capacitance between the power and ground planes. This paper investigates the electrical properties of ...