Journal ArticleDOI
Theoretical and experimental determination of cell constants of planar-interdigitated electrolyte conductivity sensors
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In this article, an analytical expression for the cell constant of planar-interdigitated electrodes used as electrolyte conductivity sensors is presented and compared with results of measurement carried out with several differently shaped planar probes provided with a thin Ta2O5 insulating film, showing good agreement.Abstract:
In this paper, an analytical expression is presented for the cell constant of planar-interdigitated electrodes used as electrolyte conductivity sensors. The result of this expression is compared with results of measurement carried out with several differently shaped planar probes provided with a thin Ta2O5 insulating film, showing good agreement. More than 10 different devices have been fabricated with predicted cell constants ranging from 0.14 to 4.44 cm?1. The measured cell constants are typically 10?20% smaller, possibly due to fringing effects.read more
Citations
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Fully Packaged Carbon Nanotube Supercapacitors by Direct Ink Writing on Flexible Substrates
TL;DR: This work presents for the first time the printing of a fully packaged single-wall carbon nanotube-based supercapacitor with direct ink writing (DIW) technology that has energy and power performances that are among the best in recently reported planar carbon-basedsupercapacitors that are only partially printed or nonprinted.
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High-resolution on-chip supercapacitors with ultra-high scan rate ability
TL;DR: In this paper, a simple approach for the fabrication of high-resolution on-chip supercapacitors with increased performances is demonstrated, and the resulting micro-devices display high specific cell capacitance (3 mF cm−2 using a hydrous ruthenium oxide electrode) and impressive scan rate abilities, up to 10000 V s−1 for multi-walled carbon nanotube based micro-supercapACitors.
Journal ArticleDOI
Detection of Escherichia coli and Salmonella typhimurium using interdigitated microelectrode capacitive immunosensors: the importance of transducer geometry.
TL;DR: An immunosensing system to detect Escherichia coli and Salmonella based on electrochemical impedance spectroscopy at interdigitated electrode structures is presented and the results show the importance of good electrode design in the final detection limit.
Journal ArticleDOI
Geometric parameters optimization of planar interdigitated electrodes for bioimpedance spectroscopy
TL;DR: In this article, a physical model of an interdigitated sensor working in a frequency range from 100 Hz to 10 MHz was used to optimize the use of the sensor for bioimpedance spectroscopy.
Journal ArticleDOI
Simultaneous electrical recording of cardiac electrophysiology and contraction on chip
Fang Qian,Chao Huang,Yi-Dong Lin,Anna N. Ivanovskaya,Thomas O'Hara,Ross Booth,Cameron J. Creek,Heather A. Enright,David A. Soscia,Anna M. Belle,Ronglih Liao,Felice C. Lightstone,Kristen S. Kulp,Elizabeth K. Wheeler +13 more
TL;DR: A novel cardiac platform that can record cardiac tissue adhesion, electrophysiology, and contractility on the same chip and provides a quantitative and predictive assay system that can potentially be used for comprehensive assessment of cardiac toxicity earlier in the drug discovery process.
References
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Journal ArticleDOI
Excitation of elastic surface waves by spatial harmonics of interdigital transducers
TL;DR: In this paper, the electric field distribution from a surface wave interdigital transducer is investigated for anisotropic, small-coupling propagation medium, and the capacitance of the transducers is derived.
Journal ArticleDOI
A new probe for measuring electrolytic conductance
TL;DR: In this article, a conductance cell of which the electrodes are provided with a 110 nm thick Ta2O5 insulating film is proposed and realized, where the stable and very low impedance of the total oxide/solution interface largely reduces interference from redox processes.
Journal ArticleDOI
New operational modes for the Ta2O5-based electrolyte conductance cell
TL;DR: In this paper, two specific operational modes are proposed based on the conductance cell, in the oscillator mode, the conductivity of the electrolyte determines the frequency of an oscillator, experimentally obtaining a shift from 10 to 27 kHz for a KCl concentration range from 0.5 to 100 mM.
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