Combined Effect of Temperature Induced Strain and Oxygen Vacancy on Metal‐Insulator Transition of VO2 Colloidal Particles
Journal article
Kargal, G L, Sathasivam, S., Li, J., Portnoi, M., Parkin, I. P. and Papakonstantinou, I (2020). Combined Effect of Temperature Induced Strain and Oxygen Vacancy on Metal‐Insulator Transition of VO2 Colloidal Particles. Advanced Functional Materials. 30 (49), p. 2005311. https://doi.org/10.1002/adfm.202005311
Authors | Kargal, G L, Sathasivam, S., Li, J., Portnoi, M., Parkin, I. P. and Papakonstantinou, I |
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Abstract | Vanadium dioxide (VO2) is a promising material in the development of thermal and electrically sensitive devices due to its first order reversible metal-insulator transition (MIT) at 68 °C. Such high MIT temperature (TC) largely restricts its widespread application which could be enabled if a straightforward tuning mechanism were present. Here this need is addressed through a facile approach that uses the combined effects of temperature induced strain and oxygen vacancies in bulk VO2 colloidal particles. A simple thermal annealing process under varying vacuum is used to achieve phase transformation of metastable VO2(A) into VO2(M2), (M2+M3), (M1) and higher valence V6O13 phases. During this process, distinct multiple phase transitions including increased as well as suppressed TC are observed with respect to the annealing temperature and varied amount of oxygen vacancies respectively. The latent heat of phase transition is also significantly improved upon thermal annealing by increasing the crystallinity of the samples. This work not only offers a |
Year | 2020 |
Journal | Advanced Functional Materials |
Journal citation | 30 (49), p. 2005311 |
Publisher | Wiley |
ISSN | 1616-3028 |
Digital Object Identifier (DOI) | https://doi.org/10.1002/adfm.202005311 |
Publication dates | |
09 Sep 2020 | |
Publication process dates | |
Accepted | 29 Jul 2020 |
Deposited | 05 Dec 2022 |
Publisher's version | License File Access Level Open |
https://openresearch.lsbu.ac.uk/item/911v5
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Adv Funct Materials - 2020 - Gurunatha - Combined Effect of Temperature Induced Strain and Oxygen Vacancy on.pdf | ||
License: CC BY 4.0 | ||
File access level: Open |
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