Fabrication of thermochromic composite using monodispersed VO2 coated SiO2 nanoparticles prepared by modified chemical solution deposition

Abstract Monodispersed thermochromic VO 2 particles were fabricated by VO 2 coating onto monodispersed SiO 2 nanoparticles with the modified chemical solution deposition technique using vanadium isopropoxide solution and monodispersed SiO 2 particle suspension solution. The average size of the resultant VO 2 –SiO 2 particle was 57 nm and the coating thickness of the VO 2 layer was 6 nm. A thermochromic composite was fabricated using the VO 2 –SiO 2 particles and a poly lactose acid polymer as a transparent matrix, and the transmittance of the composite at a high temperature was 10% less than that at a low temperature.