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Instruments and Systems: Monitoring, Control, and Diagnostics

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Gas chemical nanosensors with sensing elements based on indium oxide: the analysis of development during last years. Part 2
V.A. BUZANOVSKII

The results of development of gas chemical nanosensors with sensing elements based on indium oxide received during the last few years
are submitted in the review. The developed devices are systematized according to construction features of sensing elements. Thus, four
nanosensor groups are defined. Group 1 is devices sensing elements of which have a covering of only indium oxide. Group 2 is nanosensors
with the sensing elements containing a covering of indium oxide and an external layer of other material. Group 3 is devices sensing
elements of which have a covering of the composite based on indium oxide. Group 4 is nanosensors with the sensing elements containing
a covering of the composite based on indium oxide and an external layer of other material. Analytical abilities of the listed device groups
are considered. 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 temperature of sensing
element on sensitivity and selectivity of measurements, response time and recovery time is shown. The review consists of three parts. The
construction features and analytical abilities of nanosensors of group 1 are reflected in the first part of the review. The second part of the
review is devoted to the construction features and analytical abilities of devices of group 2. The construction features and analytical abilities
of nanosensors of groups 3 and 4 are considered in the third part of the review. At the end of the review, the general characteristic of the
listed groups of devices is given and fields of their potential application are specified.
Keywords: nanotechnology, nanomaterial, gas chemical nanosensor, sensing element, covering, indium oxide, metrological
characteristic.

Contacts: vab1960@rambler.ru

Pp. 44-49.

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