Hydrothermal synthesis of vo2 films from alcohol solution

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Resumo

M phase vanadium dioxide was firstly synthesized with alcohol as the media instead of water via a simple hydrothermal method on single-crystal r-sapphire substrates. The resulting materials demonstrate a sharp dielectric-metal transition with a change in electrical resistance of about 4 orders of magnitude near the phase transition temperature (68°C). The conditions for synthesizing films comparable in electrophysical characteristics to analogs obtained in aqueous media are established. The proposed method enlarges possibilities for the hydrothermal synthesis of film oxide materials

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Sobre autores

О. Boytsova

Lomonosov Moscow State University

Autor responsável pela correspondência
Email: boytsovaov@my.msu.ru
Rússia, Moscow

А. Tatarenko

Lomonosov Moscow State University

Email: boytsovaov@my.msu.ru
Rússia, Moscow

V. Chendev

Lomonosov Moscow State University; Plekhanov Russian Economic University

Email: boytsovaov@my.msu.ru
Rússia, Moscow; Moscow

A. Makarevich

Lomonosov Moscow State University

Email: boytsovaov@my.msu.ru
Rússia, Moscow

I. Roslyakov

Lomonosov Moscow State University

Email: boytsovaov@my.msu.ru
Rússia, Moscow

О. Makarevich

Lomonosov Moscow State University

Email: boytsovaov@my.msu.ru
Rússia, Moscow

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2. Fig. 1. Diffraction patterns of VO2 films obtained in an alcohol solution at different concentrations of the precursor mixture on substrates made of single-crystal r-sapphire under hydrothermal conditions.

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3. Fig. 2. Raman spectra of VO2 films obtained in an alcohol solution at different concentrations of the precursor mixture on substrates made of single-crystal r-sapphire under hydrothermal conditions.

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4. Fig. 3. SEM images of VO2 films obtained in an alcohol solution at different concentrations of the precursor mixture on substrates made of single-crystal r-sapphire under hydrothermal conditions.

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5. Fig. 4. Temperature dependences of the resistance change of VO2 films obtained in an alcohol solution at different concentrations of the precursor mixture on substrates made of single-crystal r-sapphire under hydrothermal conditions. The dependence of the electrical resistance for a sample obtained in an aqueous solution is given as a comparison sample.

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