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Functional Properties of APCVD VO2 Layers |
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PP: 187-191 |
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Author(s) |
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Dimitra Vernardou,
Dimitrios Louloudakis,
Emmanuel Spanakis,
Nikolaos Katsarakis,
Emmanuel Koudoumas,
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Abstract |
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| The growth of isolated monoclinic and metastable vanadium dioxide phases was possible by the atmospheric pressure chemical vapor deposition at 500 oC through the control of oxygen flow rate. The as-grown coating for 0.2 L min-1 showed a reversible switching behavior at 62 oC with a difference in transmittance of the order of 40 %. On the other hand, the coating deposited for 0.8 L min-1 had good electrochemical response presenting capacitance retention of 96 % after 500 scans. The results are discussed in terms of the materials’ observed structure and morphology. We showed that the transition characteristics of the coatings are based on the competing effects of crystallinity and crystallite size, while their electrochemical response is related to the increased surface area ratio of the nanorods. |
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