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2-Based Smart Coatings with Long-Term Durability: Review and Perspective
Published in Yi Long, Yanfeng Gao, Vanadium Dioxide-Based Thermochromic Smart Windows, 2021
Vanadium dioxide (VO2) is an archetypal phase transition material and undergoes a reversible semiconducting–metallic transition at the critical temperature (Tc ≈ 68°C) [1]. For temperatures below Tc, VO2 is in a semiconducting state and shows a relatively high transmittance for solar radiation; when the temperature goes over Tc, VO2 is in a metallic state with a low solar transmittance [2]. On the basis of this thermochromic feature, VO2 has been widely investigated as “smart coatings” for building fenestration to realize solar control and the resultant energy-efficient function.
Tunable Metamaterials
Published in Pankaj K. Choudhury, Metamaterials, 2021
Vanadium dioxide (VO2) is a metal oxide with phase transition properties. Its low transformation temperature (341 K) makes it widely applied in optical, electronic and photoelectric devices. Wang et al. [54] proposed a thermally tunable infrared metamaterial based on VO2. Numerical simulations show that, when VO2 is in a metallic state, there is a wide absorption peak at the wavelength of 10.9 μm, but when it assumes a dielectric phase at the phase transition temperature of 341 K, the wavelength changes to 15.1 μm, illustrating a large tunability (38.5%) of the resonance wavelength.
A review on green approaches utilizing phytochemicals in the synthesis of vanadium nano particles and their applications
Published in Preparative Biochemistry & Biotechnology, 2023
Smriti Bansal, Ankita Singh, Deepak Poddar, Sanjeeve Thakur, Purnima Jain
Apart from this, vanadium metal finds its application in the glass and ceramic production sector. Vanadium dioxide is used for thermochromic coatings due to its unique property called an insulator-metal transition. The significant advantage of vanadium oxide over other materials is that the insulator-metal transition occurs closest to room temperature (340K).[44] It also acts as a catalyst in the manufacturing of sulfuric acid and various other chemicals. Vanadium pentoxide thin films were used in reflectance mirrors, optical filters, bright surfaces, and windows possessing tunable emittance for temperature controlling of space vehicles.[45] Organo-Vanadium compounds possess great importance in organic chemistry and polymer chemistry as a reagent and catalyst due to their low valency, stabilizing carbonyl ligands.[46] In polymer chemistry, organovanadium compounds are implicated as catalysts to produce butadiene-based rubbers. These complexes are synthesized in situ. One of the researchers stated that organovanadium compounds are more bactericidal than their parent ligand and vanadium metal salt. It has also been reported that these complexes disturb the cell’s respiratory system of bacteria and inhibit the synthesis of proteins, restricting the growth of bacterial cells.[47]
Surface hydrogeneration of vanadium dioxide nanobeam to manipulate insulator-to-metal transition using hydrogen plasma
Published in Journal of Asian Ceramic Societies, 2021
Hyunwoo Kang, Minhwan Ko, Hyobin Choi, Wanggon Lee, Ranveer Singh, Mohit Kumar, Hyungtak Seo
The nature of the phase transition in strongly correlated metal oxides (e.g. transition metal oxides) opens new possibilities for various kind of applications such as energy storage, memory storage, switching, etc. [1]. Among various metal oxides, vanadium dioxide (VO2) is of particular interest because of a variety of conceivable applications based on its ultrafast metal-to-insulator transition (MIT) [2–7]. Vanadium dioxide undergoes a first-order transition from a high-resistivity semiconductor monoclinic (M1) phase to a metallic rutile (R) phase and exhibits an effective change in electrical resistivity of the third to fourth order within a narrow temperature range [3,8–11]. This change in electrical properties is accompanied by a significant optical transition in the infrared (IR) region that exhibits thermochromic action [6,7,11–16]. The mechanism by which MIT occurs in VO2 is still a debatable topic, although MIT in the VO2 is generally driven by the strong electron–electron correlations associated with Mott transitions or the electron–phonon interactions associated with Peierls transitions. Consequently, much effort has been made to understand the external strain, stoichiometry, interfacial stress, and the essential effect of doping on the IMT of VO2 [8–10, 16–19].
Structure and thermochromic properties of Mo-doped VO2 thin films deposited by sol–gel method
Published in Inorganic and Nano-Metal Chemistry, 2019
Yuanyuan Dang, Danping Wang, Xin Zhang, Lin Ren, Binyu Li, Juncheng Liu
Vanadium dioxide (VO2) has been greatly studied due to its well-known reversible phase transition from semiconductor monoclinic phase to metallic tetragonal phase (SMT) at a critical temperature of 68 °C. This SMT in VO2 accompanies with abrupt and drastic changes in the optical and electrical properties,[1] which takes place rapidly in 10−12 S.[2,3] More than ten kinds of crystalline phases of VO2 have been reported, some examples being monoclinic VO2 (M), tetragonal VO2 (R), and several metastable forms of VO2 (A), VO2 (B) and VO2 (C). However, among these phases only the rutile-type VO2 (R/M) phase undergoes a fully reversible SMT at a temperature of 68 °C.[4] All these properties make VO2 a promising candidate for a variety of emerging technological applications such as sensor devices,[5] protective devices for blinding laser weapons,[6] modern electronic devices,[7] uncooled infrared detectors[8] and thermochromic windows.[9]