نتایج جستجو برای: capacitance

تعداد نتایج: 12164  

2011
K. W. Park H. P. Nair A. M. Crook E. T. Yu

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...

2010
Shu-Hua Wu Chih-Kang Deng Tuo-Hung Hou Bi-Shiou Chiou

In this study, we demonstrate the stability of highLa2O3 metal–insulator–metal (MIM) capacitors under constant voltage stress (CVS). It was found that the variation in capacitance caused by CVS strongly depends on the injected charges regardless of stress biases. Furthermore, the quadratic voltage coefficient of capacitance ( ) decreases with a logarithmic increase in dielectric loss. Charge tr...

2013
William E. White Scott L. Hooper

White WE, Hooper SL. Contamination of current-clamp measurement of neuron capacitance by voltage-dependent phenomena. J Neurophysiol 110: 257–268, 2013. First published April 10, 2013; doi:10.1152/jn.00993.2012.—Measuring neuron capacitance is important for morphological description, conductance characterization, and neuron modeling. One method to estimate capacitance is to inject current pulse...

2003
F. C. MEINZER

The present study examines the manner in which several whole-tree water transport properties scale with speciesspecific variation in sapwood water storage capacity. The hypothesis that constraints on relationships between sapwood capacitance and other water relations characteristics lead to predictable scaling relationships between intrinsic capacitance and whole-tree behaviour was investigated...

2003
A A Kuijpers G J M Krijnen R J Wiegerink M Elwenspoek

This paper presents the results of 2D-finite-element simulations of the periodic change in capacitance between two periodic structures, one sliding and one fixed (i.e. sense-structure). These structures are potentially interesting for long-range and high-accuracy position detection of microactuators. The use of periodic geometries and the combination of a discrete (incremental) and analog measu...

2005
S. Schlaeger

Spatial moisture distribution in natural soil or other material is a valuably information for many applications. Standard measurement techniques give only mean or punctual results. Therefore a new inversion algorithm has been developed to derive moisture profiles along single TDR sensor-probes. The algorithm uses the full information content of TDR reflection data measured from one or both side...

Journal: :Journal of cell science 1993
M Lindau O Nüsse J Bennett O Cromwell

We have investigated the granule fusion events associated with exocytosis in degranulating peritoneal guinea pig eosinophils by time-resolved patch-clamp capacitance measurements using the phase detector technique. Intracellular stimulation with micromolar calcium and GTP gamma S induces a 2- to 3-fold capacitance increase. The main phase of the capacitance increase occurs after a delay of 2-7 ...

Journal: :Science 2011
Lu Li C Richter S Paetel T Kopp J Mannhart R C Ashoori

Increases in the gate capacitance of field-effect transistor structures allow the production of lower-power devices that are compatible with higher clock rates, driving the race for developing high-κ dielectrics. However, many-body effects in an electronic system can also enhance capacitance. Onto the electron system that forms at the LaAlO(3)/SrTiO(3) interface, we fabricated top-gate electrod...

1999
Andrew B. Kahng Sudhakar Muddu

We describe an improved iterationless approach for computing the effective capacitance of an interconnect load at a driving gate output. The speed and accuracy of our approach makes it suitable for the analysis loop within performance-driven iterative layout optimization. We present an iterationless approach for computing the effective capacitance of an interconnect load at a gate output when t...

Journal: :Lab on a chip 2012
Rimi Lee Jihun Kim Sook Young Kim Seon Mi Jang Sun-Mi Lee In-Hong Choi Seung Woo Park Jeon-Soo Shin Kyung-Hwa Yoo

Label-free cell-based assays have emerged as a promising means for high-throughput screening. Most label-free sensors are based on impedance measurements that reflect the passive electrical properties of cells. Here we introduce a capacitance-based assay that measures the dielectric constant (capacitance) of biological cells, and demonstrate the feasibility of analyzing endocytosis and screenin...

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