A convenient way to reduce the hysteresis width of VO2(M) nanomaterials

Abstract

As a well-known inorganic thermochromic material, VO₂(M) is attracting extensive attention regarding the synthetic methods and growth controls to improve its properties. A simple and convenient method is provided for the preparation of star-like VO₂(M) nanomaterials with narrow hysteresis width around 4.3 °C. The sample is obtained by dehydration of a new intermedium, star-like VO₂(M)·0.15H₂O, whose possible formation mechanism has been proposed supported by time-dependent SEM growth images. Furthermore, the star-like VO₂(M) shows excellent phase transition and optical switching properties that will be beneficial for highly sensitive electrical/optical devices or other applications.