Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Study of the microstructure and composition of tin dioxide layers modified by silver nanoparticles

Z.V. Shomakhov1, S.S. Nalimova2, R.M. Kalmykov1, K. Aubekerov2, V.A. Moshnikov2

1 Kabardino-Balkarian State University
2 Saint Petersburg Electrotechnical University «LETI»

DOI: 10.26456/pcascnn/2021.13.447

Original article

Abstract: Tin dioxide layers were synthesized by hydrothermal method from an aqueous solution of SnF2 . Silver nanoparticles were deposited on the surface of the obtained layers by the photoreduction method. The surface morphology of the samples was studied by atomic force microscopy. The size of the silver nanoparticles depends on the concentration of the AgNO3 solution used for the photoreduction reaction. When synthesized from 0,02 M solution with a concentration of, the size of the nanoparticles varies from 10 to 100 nm, when the concentration of the solution is doubled, the size of the nanoparticles is about 100 nm. The surface composition of the layers before and after the deposition of silver nanoparticles was studied using the X-ray photoelectron spectroscopy. It was shown that a layer of the tin dioxide is formed without external inclusions, and metallic silver is deposited. The chemical shift of the peaks of tin and oxygen after the deposition of silver nanoparticles indicates the exchange of electrons between tin and silver. The synthesized layers are of interest for application in the field of semiconductor adsorption gas sensors.

Keywords: tin dioxide, silver nanoparticles, gas sensors, atomic force microscopy, X-ray photoelectron spectroscopy

  • Zamir V. Shomakhov – Ph. D., Docent, Electronics and Digital Information Technologies Department, Kabardino-Balkarian State University
  • Svetlana S. Nalimova – Ph. D., Docent, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
  • Rustam M. Kalmykov – Ph. D., Docent, Electronics and Digital Information Technologies Department, Kabardino-Balkarian State University
  • Kirill . Aubekerov – graduate student, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
  • Vyacheslav A. Moshnikov – D. Sc., Professor, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»

Reference:

Shomakhov, Z.V. Study of the microstructure and composition of tin dioxide layers modified by silver nanoparticles / Z.V. Shomakhov, S.S. Nalimova, R.M. Kalmykov, K.. Aubekerov, V.A. Moshnikov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2021. — I. 13. — P. 447-456. DOI: 10.26456/pcascnn/2021.13.447. (In Russian).

Full article (in Russian): download PDF file

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