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This study demonstrated that electrical double layer capacitors (EDLC) can be fabricated using Ge electrodes and ionic liquids. We found that the ionic liquids must be dried for the use of electrolytes of the EDLCs because water causes chemical reaction with Ge. This chemical reaction is, however, useful to make porous structures on the Ge to prepare large surface area electrodes essential to the...
Plasmas that are generated on and in liquids are generally the subject of pure research at universities; however, they have considerable practical potential for use in material processing, water purification, and sterilization. Their chief drawback is that they require a large device to generate in-water plasmas and a bulky power supply. If the device size and the volume of the power supply could...
In this paper, we present an ultrasonic transducer for the detection of hydrocarbon pollutants with a given concentration threshold. The device is made by screen-printing using piezoelectric PZT (Lead Zirconate Titanate). The piezo device is used as an ultrasound emitter and receiver that allow the measurement of sound velocity in a liquid medium, the value of the sound velocity being modified by...
A much refined experimental technique and analysis of measurements of dielectric breakdown in hydrocarbon liquids, in particular: n-hexane, has shown that the time lag distribution of an unperturbed liquid is governed by a Weibull probability function. Among dielectric liquids stressed at a constant electric field this is the first account of the applicability of the statistics of extreme values....
Everyone concerned with the measurement of the properties of dielectrics has probably been faced with the problem of measuring the dielectric constants of thin films. “Thin films” are understood to mean varnish, resin or other solid dielectric material not more than a few mils thick. It is the purpose of this paper to discuss some of the methods used, their advantages and limitations, and to suggest...
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