Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Defining the parameters of the environment (organic and inorganic chemical compounds) using gas chemical nanosensors based on the island of tungsten oxides PART 2. Gas-sensitive chemical nanosensors elements of the oxide-coated tungsten determination of inorganic and organic chemicals. Analysis of development during last years A.P. VEDERNIKOVA V.A. BUZANOVSKII T.G. SAMCHARADZE A.R. VAHITOV Results of development during last years of gas chemical nanosensors with the sensitive elements based on tungsten oxides are submitted in the review. The developed devices are systematized according to construction features of their sensitive elements. Thus four nanosensor groups are defined. Group 1 is devices sensitive elements of which have a covering only from tungsten oxide. Group 2 is nanosensors with the sensitive elements containing a covering based on tungsten oxide and an external layer of other material. Group 3 is devices sensitive elements of which have a covering from tungsten oxide, a layer of composite and an external layer of oxide of other metal. Group 4 is nanosensors with the sensitive elements containing a covering from a composite based on tungsten oxide. Analytical abilities of the listed device groups are demonstrated. Typical regularities are marked. In particular, ability of the nanosensors to determination of the big number of inorganic and organic chemical compounds is presented. Influence of thickness, morphology and composition of a covering and also temperature of sensitive elements on sensitivity and selectivity of carried out measurements, response time and recovery time is shown. Key words: nanotechnology, nanomaterial, gas chemical nanosensor, sensitive element, covering, tungsten oxide, metrological characteristic. Contacts: Е-mail: vab1960@rambler.ru Pp. 40-54.