Two-Stage Synthesis of Structured Microsystems Based on Zinc-Oxide Nanorods by Ultrasonic Spray Pyrolysis and the Low-Temperature Hydrothermal Method

Ryabko, A. A.; Maximov, A. I.; Verbitskii, V. N.; Левицкий, В. С.; Мошников, В. А.; Теруков, Е. И.

doi:10.1134/s1063782620110238

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…As it is clear from Fig. 6, the zinc oxide NRs have the photoconductivity in visible irradiation without decorating by the AgInS 2 QCDs, which is due to defect levels within an zinc oxide band gap (E g ≈ 3.3 eV) [45]. Nevertheless, NR decoration by the AgInS 2 QCDs results in increase in the photoresponse (I light /I dark ) approximately in 10 times.…”

Section: Resultsmentioning

confidence: 93%

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Sensitization of ZnO nanorods by AgInS-=SUB=-2-=/SUB=- colloidal quantum dots for adsorption gas sensors with light activation

et al. 2022

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A low-temperature technique for the formation of coatings based on ZnO nanorods decorated with colloidal AgInS2 quantum dots is presented. It is shown that ZnO nanocrystals and colloidal AgInS2 quantum dots with a shell of mercaptopropionic acid molecules form a heterojunction. Sensitization of ZnO nanorods with AgInS2 colloidal quantum dots to visible irradiation provides a gas analytical response of the structure to isopropyl alcohol vapor at room temperature under blue LED illumination with a peak wavelength of 460 nm. Keywords: adsorption gas sensors, photoactivation of gas sensitivity, zinc oxide nanorods, AgInS2 colloidal quantum dots, sensitization.

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Section: Resultsmentioning

confidence: 93%

“…The ZnO NR coatings were synthesized on various substrates in two stages: depositing a nucleating layer by the ultrasound spray-pyrolysis method and growing the NRs by the soft hydrothermal method [45]. After the ZnO NRs had been synthesized, the samples were annealed at the temperature of 500 • C for 10 min.…”

Section: Materials and Research Techniquesmentioning

confidence: 99%

Sensitization of ZnO nanorods by AgInS-=SUB=-2-=/SUB=- colloidal quantum dots for adsorption gas sensors with light activation

et al. 2022

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“…Formation of a gas-sensitive nanostructured zinc oxide layer (Fig. 1) was carried out by an easily scalable twostage technique based on ultrasonic spray pyrolysis and lowtemperature hydrothermal synthesis [38]. Hexamethylenetetramine and zinc nitrate of an equimolar concentration of 25 mM were used as precursors for the hydrothermal synthesis of zinc oxide nanorods.…”

Section: Methodsmentioning

confidence: 99%

Gas sensitivity of nanostructured coatings based on zinc oxide nanorods under combined activation

et al. 2022

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This paper presents a study of the gas sensitivity of a nanostructured zinc oxide coating to isopropyl alcohol vapor during heating, ultraviolet irradiation, as well as simultaneous heating and irradiation. Simultaneous heating to 150oC and ultraviolet irradiation ensures an increase in the sensor layer response. A 10-fold decrease in the power consumption of an ultraviolet light-emitting diode results in a 1.2-fold decrease in the response of the sensor coating. Reducing the operating temperature of a gas sensor with low power consumption and achieving the required sensitivity can provide adsorption sensors integration into portable devices for monitoring ambient air quality. Keywords: zinc oxide, nanorods, gas sensor, UV irradiation, combined activation.

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“…Low-temperature hydrothermal synthesis of ZnO nanorods from a seed layer was carried out using an aqueous solution of zinc nitrate (purity ≥ 98%, Vekton, Saint Petersburg Russia) and hexamethylenetetramine (purity ≥ 98%, Vekton, Saint Petersburg, Russia) with an equimolar concentration of 25 mM, to which ammonia water (purity ≥ 98%, Vekton, Saint Petersburg, Russia) and polyethyleneimine (branched, Mw ~ 800, Sigma-Aldrich, St. Louis, MO, USA) were added to ensure ZnO nucleation in the bulk of the solution. The features of the synthesis of the ZnO nanorods have been described in more detail in [49]. After synthesis, the ZnO nanorods were annealed at a temperature of +500 °C for 5 min.…”

Section: Formation Of An Electrode Coating From Zno Nanorodsmentioning

confidence: 99%

Impedimetric Biosensor Coated with Zinc Oxide Nanorods Synthesized by a Modification of the Hydrothermal Method for Antibody Detection

et al. 2023

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Impedimetric biosensors are used for detecting a wide range of analytes. The detection principle is a perspective for the development of new types of analytical devices for biomolecular diagnosis of diseases. Of particular interest are biosensors with very high sensitivities, capable of detecting trace amounts of biomarkers or drugs in biological fluids. Impedimetric biosensors possess a potential for increased sensitivity, since their electrodes can be modified with nanostructured materials, in particular zinc oxide. In this work, a miniature biosensor with an array of zinc oxide nanorods synthesized by the hydrothermal method has been created. Protein A was immobilized on the resulting structure, which was previously tested for binding to omalizumab by capillary electrophoresis. Using impedance spectroscopy, it was possible to detect the binding of omalizumab at concentrations down to 5 pg/mL. The resulting structures are suitable for creating reusable biosensor systems, since ZnO-coated electrodes are easily cleaned by photocatalytic decomposition of the bound molecules. The biosensor is promising for use in Point-of-Care systems designed for fast, multimodal detection of molecular markers of a wide range of diseases.

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Two-Stage Synthesis of Structured Microsystems Based on Zinc-Oxide Nanorods by Ultrasonic Spray Pyrolysis and the Low-Temperature Hydrothermal Method

Cited by 15 publications

References 24 publications

Sensitization of ZnO nanorods by AgInS-=SUB=-2-=/SUB=- colloidal quantum dots for adsorption gas sensors with light activation

Sensitization of ZnO nanorods by AgInS-=SUB=-2-=/SUB=- colloidal quantum dots for adsorption gas sensors with light activation

Gas sensitivity of nanostructured coatings based on zinc oxide nanorods under combined activation

Impedimetric Biosensor Coated with Zinc Oxide Nanorods Synthesized by a Modification of the Hydrothermal Method for Antibody Detection

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