In the recent past a great deal of research efforts were directed toward the development of
miniaturized gas-sensing devices, particularly for toxic gas detection and for pollution …

The research on ZnO has a long history but experiences an extremely vivid revival during
the last 10 years. We critically discuss in this didactical review old and new results …

In nature, snowflake ice crystals arrange themselves into diverse symmetrical six-sided
structures. We show an analogy of this when zinc (Zn) dissolves and crystallizes in liquid …

Photocatalytic overall water splitting has been studied extensively from the viewpoint of solar
energy conversion. Despite numerous attempts, none have yielded satisfactory results for …

The dc electrical conductivity and optical properties of undoped zinc oxide films prepared by
the sol-gel process using a spin-coating technique were investigated. The ZnO films were …

The complex dielectric functions, ε (E)= ε 1 (E)+ iε 2 (E), of ZnO have been measured by
spectroscopic ellipsometry (SE) in the photon-energy range between 1.5 and 5.0 eV at room …

Al-doped zinc oxide (ZnO) thin films were prepared by chemical spray pyrolysis technique.
The dopant concentration (Al/Zn at%) varied from 0 to 1.5 at%. Structural analysis of the films …

The electrical and gas sensing properties of chemically deposited zinc oxide (ZnO) films
were investigated. Two activation energy values, 0.3 eV and 0.8–0.9 eV, were determined in …

A review of three commonly used classes of chemical sensor technologies as applicable to
implementation in portable, handheld field instruments is presented. Solid-state gas and …

Nickel ferrite, a p-type semiconducting oxide with an inverse spinel structure has been used
as a gas sensor to selectively detect chlorine in air. This compound was prepared by two …