Current and voltage noise in WO3 nanoparticle films

Abstract

Current and voltage noise measurements have been carried out on nanoparticle WO 3 films. The fluctuation dissipation theorem holds, which indicates that the observed noise is an equilibrium phenomenon. Results on the thinnest films show that noise measurements can be used for quality assessment of nanocrystalline insulating films.

Structure of WO3 ultrafine particles and their characteristic solid states

“…WO 3 powder changes color drastically via the reduction process. Yellow (WO 3 ) changes to yellowish green (WO 3 that the powder color is due to this CS structure [4], and each color depends on a specific CS structure.…”

“…Tungsten oxide can be used as a catalyst and in gas and humidity sensors [1,2], electronic information displays [3], color memory devices and photoelectric sensors.…”

Fluctuation enhanced gas sensing on functionalized carbon nanotube thin films

“…FES was already shown to be sensitive for different analytes [11]. The most promising candidates for active layers of FES sensors are thin films made of porous nanostructured materials due to their significant electronic resistance fluctuations [12].…”

Drift effect of fluctuation enhanced gas sensing on carbon nanotube sensors

“…These films exhibit high surface area in porous structures, furthermore significant electronic conductance fluctuations can be observed in these layers [8]. Carbon nanotubes (CNTs) are also promising candidates for FES.…”