A Field Effect Based Hydrogen Sensor for Low and High Concentrations

Abstract

was prepared using thin layer technology. The sensor can be used for hydrogen detection at room temperature. Therefore, the power consumption is reduced by a factor 10 6 compared to the best low power consumption hydrogen sensors. In contrast to other sensors it can be used for measurements at very low and high hydrogen partial pressure. The limit of detection was determined to be 0.5 ppm. Measurements at high concentrations near to and above the Lower Explosion Level (LEL) of 4 % hydrogen in air are demonstrated. A method to achieve long lifetime of the sensor was developed.

Reductive Deprotonation and Dehydrogenation of Phenylhydrazine at a Nickel Center To Give a Nickel Diazenido Complex

“…The diamagnetic complex 1 was formed by oxidation of the Ni center during the course of a reductive deprotonation of phenylhydrazine with a concomitant release of dihydrogen; the formation of H 2 could be detected by hydrogen sensors based on metal insulator semiconductor structures. 27 The resulting phenylhydrazido(1−) ligand undoubtedly is bound as the NH 2 −NPh − tautomer: The two protons were located in the Fourier map and further support came from multinuclear NMR experiments. For the NH protons of the NH 2 −NPh unit, a single resonance with an integral of 2 was detected at 1.71 ppm in the 1 H NMR spectrum.…”

High-Energy X-ray Photoemission and Structural Study of Ultrapure LaF3 Superionic Conductor Thin Films on Si

“…Lanthanum fluoride (LaF 3 ) is a promising material, both for fundamental studies and for technology. It is classified as a superionic compound that is appealing for fabrication of all-solid-state electrolytes. − In this respect, it has been successfully applied as active and transport material in a variety of sensing devices, in both liquid and gaseous environments − and in metal–insulator–semiconductor (MIS) systems . Moreover, it presents a high damage resistance to UV irradiation, making it suitable for optical coatings in UV laser applications. , In addition, it also shows good infrared transmission for applications in photonic devices.…”