Surface properties of inp-zns system components

By using the IR spectroscopy method and the numerous attenuation total reflection method, the chemical composition of the solid solutions and binary components of the InP-ZnS system surfaces, exposed in air and after the thermal, vacuum treatment have been studied. The acid-base properties of the system component surfaces, attributed to the weakly acidic region (pHiso < 7), have been investigated by the methods of hydrolytic adsorption, non-aqueous conductometric titration and mechanochemistry. The possibility of using the obtained materials for the manufacture of sensors on the main gases' trace contamination is demonstrated. The conclusion on the nature of active sites, the mechanisms of acid-base interactions were made. The consistent patterns of changes in the composition of acid-base properties, predominantly statistical in nature, were established. The effect on the nature of concentration dependences of the solid solution properties by the degree of difference in the basic bulk properties, in particular, the forbidden bandwidth (∆Е) of the initial binary compounds (InP, ZnS) was confirmed. Based on the revealed correlation between the regularities of changes in surface and bulk properties, a less labor consuming and costly way of searching for the advanced, requested materials for sensor technology was justified by known bulk properties. The practical guidelines on the use of the obtained materials in sensor technology, enforced by the patents, were given and implemented.