Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method

The development of new strategies for the mass synthesis of SiC nanocrystals with high structure perfection and narrow particle size distribution remains in demand for high-tech applications. In this work, the size-controllable synthesis of the SiC 3C polytype, free of sp<sup>2</sup> car...

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Autores principales:	Evgeny A. Ekimov, Vladimir S. Krivobok, Mikhail V. Kondrin, Dmitry A. Litvinov, Ludmila N. Grigoreva, Aleksandra V. Koroleva, Darya A. Zazymkina, Roman A. Khmelnitskii, Denis F. Aminev, Sergey N. Nikolaev
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	crystal morphology etching growth models nanostructures X-ray diffraction semiconducting silicon compounds Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/a20ae12c88014ea79af71220aa60bb0b
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spelling	oai:doaj.org-article:a20ae12c88014ea79af71220aa60bb0b2021-11-25T18:32:32ZStructural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method10.3390/nano111131112079-4991https://doaj.org/article/a20ae12c88014ea79af71220aa60bb0b2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3111https://doaj.org/toc/2079-4991The development of new strategies for the mass synthesis of SiC nanocrystals with high structure perfection and narrow particle size distribution remains in demand for high-tech applications. In this work, the size-controllable synthesis of the SiC 3C polytype, free of sp<sup>2</sup> carbon, with high structure quality nanocrystals, was realized for the first time by the pyrolysis of organosilane C<sub>12</sub>H<sub>36</sub>Si<sub>6</sub> at 8 GPa and temperatures up to 2000 °C. It is shown that the average particle size can be monotonically changed from ~2 nm to ~500 nm by increasing the synthesis temperature from 800 °C to 1400 °C. At higher temperatures, further enlargement of the crystals is impeded, which is consistent with the recrystallization mechanism driven by a decrease in the surface energy of the particles. The optical properties investigated by IR transmission spectroscopy, Raman scattering, and low-temperature photoluminescence provided information about the concentration and distribution of carriers in nanoparticles, as well as the dominant type of internal point defects. It is shown that changing the growth modes in combination with heat treatment enables control over not only the average crystal size, but also the LO phonon—plasmon coupled modes in the crystals, which is of interest for applications related to IR photonics.Evgeny A. EkimovVladimir S. KrivobokMikhail V. KondrinDmitry A. LitvinovLudmila N. GrigorevaAleksandra V. KorolevaDarya A. ZazymkinaRoman A. KhmelnitskiiDenis F. AminevSergey N. NikolaevMDPI AGarticlecrystal morphologyetchinggrowth modelsnanostructuresX-ray diffractionsemiconducting silicon compoundsChemistryQD1-999ENNanomaterials, Vol 11, Iss 3111, p 3111 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	crystal morphology etching growth models nanostructures X-ray diffraction semiconducting silicon compounds Chemistry QD1-999
spellingShingle	crystal morphology etching growth models nanostructures X-ray diffraction semiconducting silicon compounds Chemistry QD1-999 Evgeny A. Ekimov Vladimir S. Krivobok Mikhail V. Kondrin Dmitry A. Litvinov Ludmila N. Grigoreva Aleksandra V. Koroleva Darya A. Zazymkina Roman A. Khmelnitskii Denis F. Aminev Sergey N. Nikolaev Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method
description	The development of new strategies for the mass synthesis of SiC nanocrystals with high structure perfection and narrow particle size distribution remains in demand for high-tech applications. In this work, the size-controllable synthesis of the SiC 3C polytype, free of sp<sup>2</sup> carbon, with high structure quality nanocrystals, was realized for the first time by the pyrolysis of organosilane C<sub>12</sub>H<sub>36</sub>Si<sub>6</sub> at 8 GPa and temperatures up to 2000 °C. It is shown that the average particle size can be monotonically changed from ~2 nm to ~500 nm by increasing the synthesis temperature from 800 °C to 1400 °C. At higher temperatures, further enlargement of the crystals is impeded, which is consistent with the recrystallization mechanism driven by a decrease in the surface energy of the particles. The optical properties investigated by IR transmission spectroscopy, Raman scattering, and low-temperature photoluminescence provided information about the concentration and distribution of carriers in nanoparticles, as well as the dominant type of internal point defects. It is shown that changing the growth modes in combination with heat treatment enables control over not only the average crystal size, but also the LO phonon—plasmon coupled modes in the crystals, which is of interest for applications related to IR photonics.
format	article
author	Evgeny A. Ekimov Vladimir S. Krivobok Mikhail V. Kondrin Dmitry A. Litvinov Ludmila N. Grigoreva Aleksandra V. Koroleva Darya A. Zazymkina Roman A. Khmelnitskii Denis F. Aminev Sergey N. Nikolaev
author_facet	Evgeny A. Ekimov Vladimir S. Krivobok Mikhail V. Kondrin Dmitry A. Litvinov Ludmila N. Grigoreva Aleksandra V. Koroleva Darya A. Zazymkina Roman A. Khmelnitskii Denis F. Aminev Sergey N. Nikolaev
author_sort	Evgeny A. Ekimov
title	Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method
title_short	Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method
title_full	Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method
title_fullStr	Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method
title_full_unstemmed	Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method
title_sort	structural and optical properties of silicon carbide powders synthesized from organosilane using high-temperature high-pressure method
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a20ae12c88014ea79af71220aa60bb0b
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Structural and Optical Properties of Silicon Carbide Powders Synthesized from Organosilane Using High-Temperature High-Pressure Method

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