Nanostructured vanadium dioxide films
Vanadium (IV) oxide (VO2) is the most widely researched thermochromic (TC) material. Owing to its fully reversible metal-insulator transition (MIT) at the critical temperature (τc) of 68 ˚C, which is the closest to the room temperature and adjustable through doping, it has the potential application...
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sg-ntu-dr.10356-654482023-03-04T16:42:52Z Nanostructured vanadium dioxide films Cao, Xun Long Yi School of Materials Science and Engineering LongYi@ntu.edu.sg DRNTU::Engineering::Materials::Nanostructured materials DRNTU::Engineering::Materials::Functional materials Vanadium (IV) oxide (VO2) is the most widely researched thermochromic (TC) material. Owing to its fully reversible metal-insulator transition (MIT) at the critical temperature (τc) of 68 ˚C, which is the closest to the room temperature and adjustable through doping, it has the potential application as the energy-saving coating for smart windows. Recent researches revealed that introducing porosity and fabrication of nanoparticles (NPs)/matrix composite foils could produce VO2 coatings at the best TC performance. This research employs lyophilisation (freeze drying) technique to fabricate nanoporous VO2 thin films and agglomeration-free NPs. The best combination of TC properties for the former achieved Tlum ≈ 50% and ΔTsol = 14.7%, while that for the latter achieved average Tlum = 35%, ΔTsol = 6.8%, τc = 64.5 ˚C and Δτc = 4.5 ˚C, with small particle size and narrow distribution (37-53 nm) as well as high crystallinity (LC = 36.76 J/g, close to the commercial VO2 powder). Master of Engineering 2015-09-28T04:41:14Z 2015-09-28T04:41:14Z 2015 2015 Thesis Cao, X. (2015). Nanostructured vanadium dioxide films. Master's thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/65448 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). 65 p. application/pdf Nanyang Technological University |
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Vanadium (IV) oxide (VO2) is the most widely researched thermochromic (TC) material. Owing to its fully reversible metal-insulator transition (MIT) at the critical temperature (τc) of 68 ˚C, which is the closest to the room temperature and adjustable through doping, it has the potential application as the energy-saving coating for smart windows. Recent researches revealed that introducing porosity and fabrication of nanoparticles (NPs)/matrix composite foils could produce VO2 coatings at the best TC performance. This research employs lyophilisation (freeze drying) technique to fabricate nanoporous VO2 thin films and agglomeration-free NPs. The best combination of TC properties for the former achieved Tlum ≈ 50% and ΔTsol = 14.7%, while that for the latter achieved average Tlum = 35%, ΔTsol = 6.8%, τc = 64.5 ˚C and Δτc = 4.5 ˚C, with small particle size and narrow distribution (37-53 nm) as well as high crystallinity (LC = 36.76 J/g, close to the commercial VO2 powder). |
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Long Yi |
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Long Yi Cao, Xun |
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Theses and Dissertations |
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Cao, Xun |
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Cao, Xun |
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Nanostructured vanadium dioxide films |
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Nanostructured vanadium dioxide films |
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Nanostructured vanadium dioxide films |
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Nanostructured vanadium dioxide films |
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Nanostructured vanadium dioxide films |
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nanostructured vanadium dioxide films |
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Nanyang Technological University |
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2015 |
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http://hdl.handle.net/10356/65448 |
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