title: Electrochemical Synthesis of Amorphous VO2Colloids and Their Rapid Thermal Transforming to VO2(M) Nanoparticles with Good Thermochromic Performance.
abstract: Amorphous VO2(a-VO2) colloids were synthesized by electrochemical anodic oxidation of metallic vanadium. It was found that the a-VO2colloids have a cotton-like morphology composed of very small clusters, and that the crystallization temperature of the a-VO2colloids can be adjusted either by the electrolyte of the anodic oxidation or/and the dispersion agent of the colloids. VO2(M) nanoparticles (NPs) (and a NP film) with an average size of about 50 nm can be obtained by a rapid thermal annealing of the a-VO2colloids at 310 °C under air, which is beneficial for practical applications. The VO2(M) NP film shows an obvious metal-semiconductor transition with a resistance less than 10 Ω in the metallic state. An integral visible transmittance of 40.7 %, a solar transmittance modulation of 9.4 %, and a resistance modulation in the order of 5×104were realized in the VO2(M) NP film.
authors: Key Laboratory of Materials Physics and, Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.
authors: Hao
authors: H
authors: Wu
authors: Key Laboratory of Materials Physics and, Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.
authors: Ming
authors: M
authors: Li
authors: Key Laboratory of Materials Physics and, Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.|School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors: Li
authors: L
authors: Zhong
authors: Key Laboratory of Materials Physics and, Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.
authors: Yuan Yuan
authors: YY
authors: Luo
authors: Key Laboratory of Materials Physics and, Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.|School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors: Guang Hai
authors: http://orcid.org/0000-0002-1593-5584
authors: GH
authors: Li
keywords: amorphous materials; electrochemistry; nanoparticles; thermochromic performance; vanadium