Preparation and Characterization of Carbon-Silicon Hybrid Nanostructures

Приготування та характеризація вуглецево-кремнієвих гібридних наноструктур
Lisnyak V.V. Mussabek G.K. Zhylkybayeva N.Zh. Baktygerey S.Z. Zaderko A.N.
2021 Sumy State University

Journal of Nano- and Electronic Physics
2021 #13 Issue 5 1 - 5 pp.

In this paper, we describe the design features of carbon-silicon (Si@C) hybrid nanostructures. Initial silicon nanoparticles (Si NPs) were prepared by acid etching from powdered (80 % Al – 20 % Si) silumin alloy. For preparing Si@C hybrid nanostructures, the use of standard thermal and chemical methods was proposed. The recommended approach involves treatment of the oxidized surface of Si NPs with polyvinylpyrrolidone as a carbon-containing precursor compound. The resulting product should be subjected to further carbonization. To prevent significant sintering of the components, Si NPs treated with polyvinylpyrrolidone were placed in a fluidized bed furnace and calcined at 400 and 500 °C in an argon atmosphere for 4 h. According to the data of atomic force microscopy, scanning electron microscopy, transmission electron microscopy (TEM), and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging, we obtained the Si@C interface and the corresponding Si/C heterostructures. By using TEM and HAADF-STEM imaging, we found that 2D carbon nanostructures are formed on the structured nanosilicon surface as on the substrate. According to the visualization of the modified interface, carbon NPs are amorphous and semi-amorphous nanostructures. Carbon NPs, the Si@C interface, and the corresponding Si/C heterostructures of Si@C hybrids can be prospective as probes for the development of new sensor devices. Sensing responses of Si@C hybrid-based sensors to ammonia, methanol and ethanol vapors were measured at room temperature and compared. Notably, hybrid-based sensors are highly sensitive with a selectivity of up to 10 ppm of ammonia, contrasting to the response to 1,000 ppm of methanol and ethanol vapors. The proposed hybrids have great potential to be used in adsorption semiconductor gas sensors to determine analytes in vapors using nanocarbon bonded to silicon in hybrid nanostructures as a probe

Hybrids , Nanostructures , Silicon and Carbon

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Kyiv National Taras Shevchenko University, 64,Volodymyrska St., Kyiv, 01601, Ukraine
Institute of Information and Computational Technologies, 125,Pushkin St., Almaty, 050000, Kazakhstan
Al-Farabi Kazakh National University, 71,Al-Farabi Ave., Almaty, 050040, Kazakhstan
Institute of High Technologies, Kyiv National Taras Shevchenko University, 2,Hlushkova Ave., Kyiv, 03187, Ukraine

Kyiv National Taras Shevchenko University
Institute of Information and Computational Technologies
Al-Farabi Kazakh National University
Institute of High Technologies

10 лет помогаем публиковать статьи Международный издатель

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