This article is cited in 1 paper

Optics of surfaces and interfaces

Spectral optical properties of ceramic nanoporous membranes based on anodic aluminium oxide coated silver in ammonia vapors

M. Yu. Vasilkov^ab, I. N. Mikhailov^ab, Yu. V. Nikulin^ac, S. S. Volchkov^b, D. A. Zimnyakov^b, N. M. Ushakov<sup>ac

a</sup> Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences, 410019 Saratov, Russia
^b Yuri Gagarin State Technical University of Saratov, 410008 Saratov, Russia
^c Saratov State University, 410012 Saratov, Russia

Abstract: Spectral optical properties of synthesized ceramic nanoporous membranes based on anodic aluminum oxide coated silver in saturated ammonia gas flow have been experimentally investigated. Based on the measured transmission spectra and detected interference part of the spectra in wavelength range from 550 to 900 nm, temporal and spectral dependencies of the effective optical thickness and its changes in non-equilibrium conditions were obtained due to adsorption of ammonia molecules on silver film surface. According to detected and measured interference maximum shifts up to 14 nm in transmission spectra of Al$_2$O$_3$ + Ag membranes in ammonia gas flow, the possibility of constructing a selective interferometric optical sensors with 10–15 min response time is shown.

Keywords: porous anodic aluminium oxide, membrane, silver film, light interference, ammonia vapors, effective optical thickness, interference maximum shift.

Received: 29.04.2021
Revised: 22.06.2021
Accepted: 08.11.2021

DOI: 10.21883/OS.2022.02.52000.2244-21

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