Preparation of Zinc-Sulfide Thin Films in the Presence of Sodium Tartrate as a complexing agent

The article offers information on the experiment done for the electrodeposition of zinc-sulfide (ZnS) thin films on the titanium substrate in the presence of sodium tartrate as a complexing agent. It states that the electrodeposition process has several advantages such as the possibility for large-scale production and minimum waste of components. It mentions that depositions were carried out by varying the deposition potential to determine the optimal conditions of deposition of ZnS thin film

Effect of Ni doping on thick film SnO2 gas sensor

Ni- and/or Al-doped and undoped SnO2 thick film gas sensors were prepared using screen printing technique and tested for their LPG gas sensitivity. Tin oxide powder was prepared using a chemical precipitation technique. The sensitivity, optimum working temperature and response time were investigated in relation to dopants as well as preparation route. The results show that the gas sensitivity is affected not only by the additive but the way it is added into the sensor material. The results indicated a reduction in grain size on Al and Ni doping. The results on resistance, response and recovery time were explained in terms of n-p junction formation between SnO2 and NiO, which increases the depletion barrier height

Study of structural and microstructural properties of SnO2 powder for LPG and CNG gas sensors

Nanosized tin oxide powders were obtained using microwave assisted synthesis procedure for their application on gas sensor technology. XRD results showed the presence of casseterite structure. As found from the XRD line broadening the crystallite size of the powders were in the range of 20-14 nm even after heating to 600 degrees C for 3 h. TEM results showed microwave assisted powders to be less agglomerated as compared to conventional process. Enhancement in LPG and CNG gas sensitivity was realized after microwave irradiation to a hydrosol solution

Study of structural and microstructural properties of SnO2 powder for LPG and CNG gas sensors

Nanosized tin oxide powders were obtained using microwave assisted synthesis procedure for their application on gas sensor technology. XRD results showed the presence of casseterite structure. As found from the XRD line broadening the crystallite size of the powders were in the range of 20-14 nm even after heating to 600 degrees C for 3 h. TEM results showed microwave assisted powders to be less agglomerated as compared to conventional process. Enhancement in LPG and CNG gas sensitivity was realized after microwave irradiation to a hydrosol solution

Effect of pressure on the fast-ion conduction in AgI-Ag<SUB>2</SUB>O-MoO<SUB>3</SUB> glasses

The effect of pressure (up to 80 kbars) on the electrical conductivity of a series of fast-ion conducting AgI-Ag<SUB>2</SUB>O-MoO<SUB>2</SUB> glasses has been investigated. The results are consistent with a cluster model

Role of surface texturization in the formation of highly luminescent, stable and thick porous silicon films

Porous silicon (PS) films were prepared by anodization on polished and textured substrates of (100) Si at different current densities for a fixed anodization time of 30 min. Using scanning electron microscopy (SEM), high-resolution X-ray diffractometry (HRXRD) and photoluminescence (PL) decay measurements, we have demonstrated that the texturization of silicon surface is a simple and effective method for the formation of mechanically stable thick porous silicon films. The PS formed on textured substrates exhibits higher porosity, negligible PL decay, better adherence to the substrate and non-fractured surface morphology compared to that formed on polished silicon substrates under the same preparation conditions. The morphology of the PS film as observed by SEM indicates the formation of highly porous vertical layers separating macroscopic domains of nanoporous silicon. The lattice mismatch or strain measurements from HRXRD revealed that a variety of good quality PS films having different strain values (by varying the current density) corresponding to wide range of band gaps suitable for sensor applications can be formed on textured substrate