Investigation of the Influence of Sensor Films Made of the Mycelium of Basidiomycetes on the Characteristics of a Me1/Al
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L RADIO SYSTEMS AND ELEMENTS
Investigation of the Influence of Sensor Films Made of the Mycelium of Basidiomycetes on the Characteristics of a Me1/AlN/Me2/Diamond Ultrahigh-Frequency Resonator A. V. Smirnova, *, N. O. Asafievb, B. P. Sorokinb, M. Yu. Ziangirovac, A. V. Golyshkinc, L. M. Krasnopol’skaya c, and I. E. Kuznetsovaa, ** a
Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, 125009 Russia b Technological Institute of Superhard and New Carbon Materials, Moscow, 108840 Russia c Gauze Research Institute of New Antibiotics, Moscow, 119435 Russia *e-mail: [email protected] **e-mail: [email protected] Received March 5, 2020; revised March 5, 2020; accepted April 10, 2020
Abstract—Organic films based on extracts of the biomass of basidiomycete strain Ganoderma lucidum are proposed to use as sensor coatings for acoustic gas sensors based on a layered Me1/AlN/Me2/diamond microwave acoustic resonator. A biomass of basidiomycetes is obtained by submerged cultivation in a selected liquid nutrient medium after which biomass extracts are obtained using two-component solvent systems (water/ethanol) with different volumetric ratios. A base technique has been developed and organic films have been created based on the biomass of basidiomycete Ganoderma lucidum on the resonator surface. The morphological properties of the created films are studied using scanning electron microscopy. The Q factor and resonance frequency of the developed layered Me1/AlN/Me2/diamond microwave acoustic resonator are measured. The effect of the created organic films on the parameters of the microwave acoustic resonator is analyzed. A conclusion is drawn that these films can be used as sensor coatings for a corresponding acoustic gas sensor. DOI: 10.1134/S1064226920110169
INTRODUCTION Currently, ensuring environmental and biological safety, preventing or minimizing the consequences of terrorist attacks, and improving human living conditions, including the creation of distributed sensor systems that enable real-time monitoring of the environment, are urgent problems. To solve them, it is necessary to further develop various types of sensors and to increase their sensitivity, selectivity, reliability, and manufacturability. These sensors can be implemented using various physical principles, including acoustoelectronic technologies. In the last 25 years, a large number of acoustic chemical sensors have been developed using different methods and approaches, which made it possible to study gaseous media [1, 2]. At present, there are a large number of articles that suggest using piezoelectric resonators [3] and delay lines based on surface acoustic waves [4] or waves in plates [5, 6] as chemical sensors. Most of all proposed acoustoelectronic sensors are based on the use of special films applied to the surface of the acoustic duct. If the physical parameters of these kinds of films change under the influence of the environment, then this leads to a change in the characteristics of the acoustic wave propagating
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