Gram scale synthesis of monoclinic VO2 microcrystals by hydrothermal and argon annealing treatment

Divya Verma; Davinder Singh; Pawan Kumar; Piyush Avasthi; Viswanath Balakrishnan

doi:10.1016/j.ceramint.2018.11.014

Gram scale synthesis of monoclinic VO₂ microcrystals by hydrothermal and argon annealing treatment

Divya Verma
, Davinder Singh
, Pawan Kumar
, Piyush Avasthi
, Viswanath Balakrishnan

Indian Institute of Technology Mandi

Research output: Contribution to journal › Article › peer-review

Abstract

We report gram scale synthesis of 100% phase fraction of VO₂ (M) monoclinic in powder form with reversible phase transition by combining hydrothermal method and Ar annealing at high temperature. Optimization of single phase VO₂ (M) growth and its phase transition characteristics have been analysed systematically by varying growth parameters such as time, synthesis temperature and post growth annealing conditions. Argon annealing of hydrothermally grown VO₂ powders at 800 °C found to play key role in obtaining VO₂ (M) phase in gram scale with characteristic phase transition temperature of 68 °C. In-situ TEM has been performed to investigate the microstructure and phase change across the annealing temperature. Detailed characterizations have been carried out to correlate the phases, microstructure and transition temperature of VO₂ with respect to growth parameters.

Original language	English
Pages (from-to)	3554-3562
Number of pages	9
Journal	Ceramics International
Volume	45
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2018.11.014
Publication status	Published - 15 Feb 2019
Externally published	Yes

Keywords

Annealing treatment
In-situ TEM
Metal-insulator transition
Microcrystals
Monoclinic VO
Scalable synthesis

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10.1016/j.ceramint.2018.11.014

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title = "Gram scale synthesis of monoclinic VO2 microcrystals by hydrothermal and argon annealing treatment",

abstract = "We report gram scale synthesis of 100\% phase fraction of VO2 (M) monoclinic in powder form with reversible phase transition by combining hydrothermal method and Ar annealing at high temperature. Optimization of single phase VO2 (M) growth and its phase transition characteristics have been analysed systematically by varying growth parameters such as time, synthesis temperature and post growth annealing conditions. Argon annealing of hydrothermally grown VO2 powders at 800 °C found to play key role in obtaining VO2 (M) phase in gram scale with characteristic phase transition temperature of 68 °C. In-situ TEM has been performed to investigate the microstructure and phase change across the annealing temperature. Detailed characterizations have been carried out to correlate the phases, microstructure and transition temperature of VO2 with respect to growth parameters.",

keywords = "Annealing treatment, In-situ TEM, Metal-insulator transition, Microcrystals, Monoclinic VO, Scalable synthesis",

author = "Divya Verma and Davinder Singh and Pawan Kumar and Piyush Avasthi and Viswanath Balakrishnan",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2019",

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doi = "10.1016/j.ceramint.2018.11.014",

language = "English",

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TY - JOUR

T1 - Gram scale synthesis of monoclinic VO2 microcrystals by hydrothermal and argon annealing treatment

AU - Verma, Divya

AU - Singh, Davinder

AU - Kumar, Pawan

AU - Avasthi, Piyush

AU - Balakrishnan, Viswanath

PY - 2019/2/15

Y1 - 2019/2/15

N2 - We report gram scale synthesis of 100% phase fraction of VO2 (M) monoclinic in powder form with reversible phase transition by combining hydrothermal method and Ar annealing at high temperature. Optimization of single phase VO2 (M) growth and its phase transition characteristics have been analysed systematically by varying growth parameters such as time, synthesis temperature and post growth annealing conditions. Argon annealing of hydrothermally grown VO2 powders at 800 °C found to play key role in obtaining VO2 (M) phase in gram scale with characteristic phase transition temperature of 68 °C. In-situ TEM has been performed to investigate the microstructure and phase change across the annealing temperature. Detailed characterizations have been carried out to correlate the phases, microstructure and transition temperature of VO2 with respect to growth parameters.

AB - We report gram scale synthesis of 100% phase fraction of VO2 (M) monoclinic in powder form with reversible phase transition by combining hydrothermal method and Ar annealing at high temperature. Optimization of single phase VO2 (M) growth and its phase transition characteristics have been analysed systematically by varying growth parameters such as time, synthesis temperature and post growth annealing conditions. Argon annealing of hydrothermally grown VO2 powders at 800 °C found to play key role in obtaining VO2 (M) phase in gram scale with characteristic phase transition temperature of 68 °C. In-situ TEM has been performed to investigate the microstructure and phase change across the annealing temperature. Detailed characterizations have been carried out to correlate the phases, microstructure and transition temperature of VO2 with respect to growth parameters.

KW - Annealing treatment

KW - In-situ TEM

KW - Metal-insulator transition

KW - Microcrystals

KW - Monoclinic VO

KW - Scalable synthesis

UR - https://www.scopus.com/pages/publications/85056324266

U2 - 10.1016/j.ceramint.2018.11.014

DO - 10.1016/j.ceramint.2018.11.014

M3 - Article

AN - SCOPUS:85056324266

SN - 0272-8842

VL - 45

SP - 3554

EP - 3562

JO - Ceramics International

JF - Ceramics International

IS - 3

ER -

Gram scale synthesis of monoclinic VO₂ microcrystals by hydrothermal and argon annealing treatment

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Keywords

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