The optical and gas-sensitive properties of opal-like structures based on SnO2

Abstract

Opal like materials based on tin dioxide were prepared, and their structural and sensor character istics were studied. The optical transmission spectra of opal like structures based on SnO 2 were recorded, and the volume fraction occupied in them by tin dioxide was estimated. It was shown that structures based on SnO 2 contained a photon stop zone in the visible spectrum range. The sensor properties of the materials toward CO and H 2 were studied over the temperature range 375-425°C. The SnO 2 samples studied had much higher sensitivity to CO compared with SnO 2 materials without opal like structures.