Single-Crystalline W-Doped VO₂ Nanobeams with Highly Reversible Electrical and Plasmonic Responses Near Room Temperature

Single-crystalline vanadium dioxide (VO₂) nanostructures are of great interest because of their single-domain metal-to-insulator transition. In this paper, single-crystalline W-doped VO₂ nanobeams are synthesized for optical and electrical applications. As a result of differences in the polarization of the beams along their transverse and longitudinal axes, dual-surface plasmon resonance peaks at 1344 and 619 nm are generated, resulting in an increase in the solar modulating abilities of the VO₂ nanobeams. The conductivity of the single-crystalline W-doped VO₂ nanobeams changes by three to four orders of magnitude at the transition temperature, which is of great importance for electrical applications.