A. S. MokrushinRussian Academy of Sciences | RAS · Kurnakov Institute of General and Inorganic Chemistry
A. S. Mokrushin
Ph.D.
Сhemoresistive gas sensors, MOS-gas sensors, Semiconductors
About
46
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486
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Citations since 2017
Introduction
Study chemiresistive gas-sensing properties differents nanomaterials
Additional affiliations
June 2019 - December 2021
September 2015 - August 2019
Education
September 2015 - June 2019
September 2010 - August 2015
Publications
Publications (46)
At present, a new class of 2D nanomaterials, MXenes, is of great scientific and applied interest, and their application prospects are very broad, including as effective doping components for receptor materials of MOS sensors. In this work we have studied the influence on the gas-sensitive properties of nanocrystalline zinc oxide synthesized by atmo...
A hierarchically organized Co3O4 nanopowder was obtained via programmed chemical precipitation, exhibiting several levels of microstructural self-organization: the initial particles are 40 ± 5 nm in size (average CSR size is 32 ± 3 nm), have a somewhat distorted rounded shape and are combined into curved chains, which, in turn, form flat agglomerat...
The titanium carbide MXenes currently attract an extreme amount of interest from the material science community due to their promising functional properties arising from the two-dimensionality of these layered structures. In particular, the interaction between MXene and gaseous molecules, even at the physisorption level, yields a substantial shift...
The in-situ Raman spectroscopy oxidation of the accordion-like V2CTx MXene has been studied. It was found that a nanocomposite of V2CTx/V3O7 composition was formed as a result. The elemental and phase composition, the microstructure of the synthesized V2CTx powder and MXene film as well as the V2CTx/V3O7 nanocomposite obtained at a minimum oxidatio...
Using a combination of chemical coprecipitation and hydrothermal treatment of the resulting dispersed system, a hierarchically organized NiCo2O4 nanopowder was obtained, consisting of slightly elongated initial oxide nanoparticles self-organized into nanosheets about 10 nm thick, which in turn are combined into hierarchical cellular agglomerates of...
The oxidation process was studied for the synthesized low-layer Ti2CTx MXene deposited on a special Al2O3/Pt sensor substrate using in situ Raman spectroscopy. It is noted that on the ceramic parts of the substrate (Al2O3), the beginning of oxidation (appearance of anatase mod phase) is observed already at 316 °C, in comparison with platinum, for w...
The effect of the parameters of the synthesis of finely divided ZnO by aerosol deposition from the
gas phase on its microstructural characteristics was studied to develop an efficient method for creating selective
gas-sensing films based on semiconductor metal oxides. It was shown that an increase in the operating
temperature from 350 to 450°С lead...
An Erratum to this paper has been published: https://doi.org/10.1134/S0036023622330026
The atmospheric pressure solvothermal (APS) synthesis of nanocrystalline SnO2 (average size of coherent scattering regions (CSR)—7.5 ± 0.6 nm) using tin acetylacetonate as a precursor was studied. The resulting nanopowder was used as a functional ink component in microextrusion printing of a tin dioxide thick film on the surface of a Pt/Al2O3/Pt ch...
The method of fabricating dense ultra-high temperature ceramic materials ZrB2–HfB2–SiC–CCNT was developed using a combination of sol-gel synthesis and reaction hot pressing approaches at 1800 °C. It was found that the introduction of multilayer nanotubes (10 vol.%) led to an increase in the consolidation efficiency of ceramics (at temperatures > 16...
The process of V2O5 oxide by the combination of sol-gel technique and hydrothermal treatment using heteroligand [VO(C5H7O2)2–x(C4H9O)x] precursor was studied. Using thermal analysis, X-ray powder diffraction (XRD) and infra-red spectroscopy (IR), it was found that the resulting product was VO2(B), which after calcining at 300 °C (1 h), oxidized to...
As part of the study, we have developed a method for obtaining a single-layer Ti 2 CT x MXene by the interaction of Ti 2 AlC with a mixture of hydrochloric acid and sodium fluoride followed by delamination using a tetramethylammonium hydroxide solution and ultrasonic exposure. The obtained stable aqueous dispersion of Ti 2 CT x has been applied by...
Herein, we review printing technologies which are commonly approbated at recent time in the course of fabricating gas sensors and multisensor arrays, mainly of chemiresistive type. The most important characteristics of the receptor materials, which need to be addressed in order to achieve a high efficiency of chemisensor devices, are considered. Th...
A relatively low-temperature molten salt assisted synthesis is developed to prepare MAX phase solid solutions in the Ti2AlC–V2AlC system, to be used as precursors for the preparation of heterometallic MXenes Ti2 –xVxC. When the synthesis temperature is 1000°С, Ti1V1AlC, Ti0.5V1.5AlC, and Ti0.2V1.8AlC samples (despite the formation of a MAX phase an...
Films of nanocrystalline ZnO have been synthesized in situ on specialized substrates as a result of heat treatment of zinc acetylacetonate hydrate solutions in 1-butanol and ethylene glycol. It has been found that the morphology and coating integrity significantly depend on the solvothermal synthesis solvent. Thus, in ethylene glycol medium a coati...
Highly dispersed ZnO powders, doped with europium and praseodymium, were synthesized by the solvothermal method. It is shown that the powders based on zinc oxide have a wurtzite crystal structure with an average particle size of 67-82 nm. The average work of electron escape from the surface (WF) was calculated: the WF increase from 4.425 to 4.696-4...
The formation of NiO nanosheets (average CSR size is 10.4 nm) through the hydrothermal method using a heteroligand complex of composition [Ni(C5H7O2)2-x(C4H9O)x] as a precursor was studied. Using the obtained oxide nanopowder and pneumatic microextrusion printing, NiO coating was applied to the surface of a specialized Pt/Al2O3/Pt chip, and chemose...
ZnO/xPt nanopowders (x = 0, 0.5, 1, 3 mol%) were synthesised using the solvothermal method. The nano-composites produced were characterised using a set of physiochemical analysis methods (XRD, BET, SEM, TEM and AFM). Synthesised ZnO/Pt powders were used to prepare special ink used for microplotter printing of gas-sensing receptor layers. The chemor...
The effect of the addition of cerium acetylacetonate on the solvothermal synthesis of zinc oxide nanopowder, a promising receptor material for chemical gas sensors, was studied. The obtained products were characterized by DSC/TGA, X-ray powder diffraction analysis, Raman spectroscopy, and scanning and transmission electron microscopy. It was found...
The effect of the destruction temperature during aerosol-assisted chemical vapor deposition of highly dispersed ZnO on its microstructural characteristics has been studied with the aim of developing an efficient method for fabrication of selective gas-sensing films based on semiconductor metal oxides. It has been demonstrated that increasing the op...
Nb2O5–TiO2 nanomaterials containing 0.5 and 10 mol % TiO2 have been synthesized by the pro- grammed deposition method. The products have been characterized by modern physicochemical methods The Nb2O5–TiO2 nanomaterials have a crystal structure of orthorhombic Nb2O5 (T-phase). Individual nio- bium oxide is composed of nanoparticles with an average s...
Nb2O5 powder obtained by programmable precipitation was used to form a thick gas-sensing film as part of a chemoresistive gas sensor, by screen-printing. The coating of orthorhombic Nb2O5 consisted of nanoparticles with a size of 41.0±2.5 nm. XPS revealed Nb⁵⁺, Nb⁴⁺ and Nb²⁺ as well as oxygen vacancies in the crystal structure of niobium oxide. As...
We have applied spark ablation technology for producing nanoparticles from platinum ingots (purity of 99.97 wt. %) as a feed material by using air as a carrier gas. A maximum production rate of about 400 mg/h was achieved with an energy per pulse of 0.5 J and a pulse repetition rate of 250 Hz. The synthesized nanomaterial, composed of an amorphous...
Information about the surrounding atmosphere at a real timescale significantly relies on available gas sensors to be efficiently combined into multisensor arrays as electronic olfaction units. However, the array's performance is challenged by the ability to provide orthogonal responses from the employed sensors at a reasonable cost. This issue beco...
In2O3-10%SnO2 (ITO) thin films on various substrates have been obtained by pen plotter printing using a solution of hydrolytically active heteroligand complexes [M(C5H7O2)x(C4H9O)y] (where М = In³⁺ and Sn⁴⁺) as a functional ink. According to XRD and Raman spectroscopy, it has been established that the film has a bixbyite structure (space group Ia3/...
Сombining the sol–gel method and pen plotter printing, using the hydrolytically active heteroligand complex [Co(C5H7O2)2-x(C4H9O)x] as a component of a new functional ink, Co3O4 thin films were produced on the surface of substrates of various types. The influence of synthesis conditions and print modes on the microstructure, optical, electrophysica...
The effect of heat treatment using [Zn(H2O)(O2C5H7)2] precursor ethylene glycol solution (synthesis temperature 125–185 °C, holding time 2–6 h) on the characteristics of the obtained nanocrystalline zinc oxide powder was studied. Under all synthesis conditions crystalline ZnO was formed with a wurtzite structure and an average crystallite size of 8...
TiO2–xZrO2 films of various phase compositions were synthesized by sol–gel technique. According to the Raman spectroscopy, data films with x = 0–20% possess an anatase crystal structure, with x = 40%, exhibiting zirconium titanate ZrTiO4 structure and a film with x = 50% is amorphous. Anatase-structured films demonstrate a high and reproducible res...
Nanopowders and thin films of (СeO2)1-x(Y2O3)x composition (x = 0.10, 0.15 and 0.20) were obtained by the sol-gel process, using hydrolytically active complexes of the metal alkoxoacetylacetonate class [M(C5H7O2)3-y(C5H11Oⁱ)y] (M = Ce³⁺ and Y³⁺) as precursors. The impact of the chemical composition and crystallization conditions on the microstructu...
With the use of sol-gel technology, we obtained ZrO2-xY2O3 powders and thin films (where х = 0, 5, 10, 15, 20, 33, 40, 50 mol%) that are promising for the creation of chemical gas sensors. The phase composition was studied using XRD and Raman spectroscopy. It has been shown that an increase in the content of yttrium oxide from 0 to 50 mol% entails...
The transparent titanium-zirconium-containing gel was obtained using heteroligand coordination compounds
(namely, alkoxoacetylacetonates) as the precursors. The high-dispersive system “ZrTiO4 – carbon”, formed after
drying of such gel and carbonization of the obtained xerogel, was used to study the evolution of microstructure
for the product (ZrTiO...
A solution of metal alkoxoacetylacetonates in isoamyl alcohol was used as a functional ink for ink-jet printing of
TiO2–10%ZrO2 thin nanostructured films. It is shown that the anatase crystal lattice is formed during heat
treatment of xerogel thin films in air at a temperature of 500 °C. According to the scanning electron microscopy,
the particle s...
The influence of conditions of heat treatment of a solution [Zn(H2O)(O2C5H7)2] in 1-butanol (temperature 125–185°C, treatment times 2, 4, and 6 h) on dispersion and microstructure of the formed nanocrystalline and poorly aggregated zinc oxide, promising component for optoelectronics, including as receptor materials of chemical gas sensors, was inve...
With the use of sol-gel technology and heat-treatment at a temperature of 500 С, we obtained CeO2-xZrO2 (where х = 0, 5, 10, 20, 30, 50 mol%) powders and thin films that are promising for oxygen
detection. A phase composition of the samples was studied using XRD and Raman spectroscopy. It was shown that under these synthesis conditions, both for po...
Using the molecular layering method (ML), nanostructured TiO2 films have been synthesized that are promising for detecting oxygen over a wide range of concentrations at low operating temperatures of 150-300°C. It has been shown that an anatase thin film is formed; the particle size is 34.9 ± 3.1 nm. It has been established that it enables the highl...
The titanium dioxide nanostructured thin films have been 20%
obtained using a sol-gel process at different crystallization
temperatures. The influence of both the phase composition
and the particle dispersity of 2D nanomaterials on their
gas-sensing properties has been evaluated. The TiO2 nanostructured
thin film prepared from xerogel under the mil...
To expand the range of precursors used in the sol-gel technology for applying nanostructured SnO 2 thin films promising as components of semiconductor chemical gas sensors, the efficiency of using tin acetylacetonate solutions with various precursor concentrations was demonstrated. It was determined that finely divided SnO 2 with a crystallite size...
Sodium peroxostannate nanoparticles with graded composition were produced from aqueous hydrogen peroxide – sodium hydroxostannate solution. The uniform particles were converted to composition graded sodium stannate by mild thermal treatment for peroxide decomposition and yielded yolk-shell tin dioxide particles by dilute acid treatment. The mechani...
The synthesis of hydrolytically active heteroligand precursors of the composition [M(O2C5H7)x(ⁱOC5H11)y] (M = Zr⁴⁺ and Y³⁺) using zirconium and yttrium acetylacetonates was investigated. It was shown that the reactivity of the obtained precursors in hydrolysis and polycondensation depends on the composition of the coordination sphere. It was studie...
It was studied how the conditions of heat treatment of a [Zn(H 2 O)(O 2 C 5 H 7) 2 ] solution in isoamyl alcohol at 120-140°C for 2-60 min affect the precursor decomposition mechanism and the characteristics of the obtained nanocrystalline zinc oxide. In all the cases, the product was a crystalline substance with the wurtzite structure and a size o...
Projects
Projects (3)
The project is aimed at developing the fundamental scientific foundations for creating miniature chemical gas analyzers with
improved sensory characteristics (high magnitude and response speed, selectivity, and stability of the received signal in a
humid environment) and satisfying modern trends in microelectronics and the digital industry as a whole: low power
consumption and the ability to integrate with portable electronics and/or microelectromechanical systems (MEMS).
As it is known, many fields of science and technology, health care service, industry, when monitoring the environment, are
faced with the urgent task of qualitative, quantitative, selective and quick determination of the content of certain gases-analyte in the air using compact and easy-to-use devices. The problem of non-selectivity with the deterioration of sensitivity
in a humid environment upon gas detection by chemoresistive sensors based on semiconductor oxides, is one of the main
problems in this field. The suggested project is aimed at stepwise modification of one of the most widely used receptor
nanomaterials in chemical gas sensors is ZnO with the aim of leveling its flaws and improving its positive qualities.
Within the framework of the suggested project, an actually scientific problem has been posed related to the development of
new methods for creating chemoresistive gas sensors and multisensors for the detection of inorganic and VOC's gases, in
which additive technologies will be used, in particular, microplotter printing with functional inks with optimal rheological
properties obtained on the basis of nanomaterials of complex composition synthesized using the solvothermal method.
Within the framework of the project, the synthesis processes of oxide nanostructures, including nanocomposites, will be
studied, as a result of which fundamental knowledge in the field of the creation of oxide nanomaterials, including
nanocomposites, will be expanded, the influence of the synthesis conditions on the phase composition, microstructure and
morphology of the formed nanomaterials - solid solutions will be revealed (ZnO)1-x(Ln2O3)x with the structure of wurtzite
and nanocomposites (ZnO)1-x(Ln2O3)x/Pt (Ln = Се3+/4+, Pr3+, Eu3+), promising receptor nanomaterials for chemoresistive
gas sensors and multisensors.
Using synthesized nanomaterials, a technology will be developed for producing stable disperse systems in organic solvents in
the presence of polymer binders that satisfy the requirements for functional inks for microplotter printing of nanomaterials in
terms of their rheological characteristics, while maintaining the high resolution function and local application of the material
to the surface of sensors and multisensors.
For the first time, a comprehensive study of the chemoresistive gas-sensitive properties of thin-film receptor nanomaterials
(ZnO)1-x(Ln2O3)x/Pt (Ln = Се3+/4+, Pr3+, Eu3+) to various inorganic and VOC's gases-analyte will be performed, and the
influence of moisture and UV radiation during gas detection. The dependences of the chemoresistive gas-sensitive properties
on the elemental and phase composition, microstructure and dispersion of the obtained receptor layers will be established.
Based on the data obtained, a multisensor will be created on a specially designed miniature sensor based on the most
sensitive and selective receptor nanomaterials. Using the developed machine learning algorithm will allow detecting various
analyte gases with a high degree of selectivity, which will significantly advance the development of devices for recognizing
individual components in complex gas mixtures.
This project is dedicated to method obtaining development of thin films for oxygen chemoresistive gas sensor.
