Flexible and Scalable VO₂(M₂) Nanorod Arrays Grafted Glass Fiber Cloth for Efficient Electromagnetic Regulation

Abstract

M₂ phase vanadium dioxide (VO₂(M₂)) is an intermediate polymorph phase during the reversible phase transition from VO₂(M₁) to VO₂(R), which can be stabilized at room temperature by doping or introducing strain in the film. In this study, we provide a simple and scalable preparation of VO₂(M₂) nanorods on TiO₂ nanoparticles decorated flexible glass fiber cloth (GFC) by hydrothermal and subsequent annealing process. Because of the interfacial strain between TiO₂ and VO₂, M₂ phase VO₂ nanorods were successfully fabricated and verified. The resultant VO₂(M₂)/GFC composite demonstrates a remarkable resistance change (∼3.4 × 10⁴) across the phase transition, which is superior to the films prepared by vacuum chamber-based techniques. Meanwhile, it also demonstrates 13.1 times enhanced electromagnetic shielding efficiency and favorable emissivity modulation capability. The flexible and scalable preparation of VO₂(M₂) will broaden the promising applications of the material in both optical and electronic devices.

Keywords

electromagnetic regulation / flexible and scalable preparation / glass fiber cloth / M₂ phase VO₂

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2025 The Author(s). Electron published by Harbin Institute of Technology and John Wiley & Sons Australia, Ltd.