Strain-triggered performance regulation in V3O7·H2O/VO2(A) nanobelt aerogels for intelligent EM protection, Radar-IR stealth, thermal management, and sensing applications

doi:10.1016/j.jmst.2026.01.014

Abstract

Abstract: With the wide application of miniaturized and highly integrated electronic devices, existing single-function absorbers struggle to fulfill the requirements for intelligent EM protection and Radar-IR stealth. Therefore, it is imperative to develop an intelligent multifunctional absorber. Here, we developed the aerogels of V₃O₇·H₂O/VO₂(A) nanobelts (NBs) using a hydrothermal-freeze-drying route. A layered porous structure was constructed in the V₃O₇·H₂O/VO₂(A) NB aerogels, and their porosity and performance regulation can be triggered by the strain. On the basis of a strain response, the “on-off“ mode could be switched between EMW absorption and shielding. The aerogels exhibited strong (-45.62 dB) and wide bandwidth (8.08 GHz) absorption at 0 % strain, and the optimal EMI SE (99 % shielding) over the frequency range of 2-18 GHz at 95 % strain. These aerogels also displayed large RCS reduction (~38.65 dB m²) and low thermal conductivity (0.0255 W m^-1 K^-1), rendering them promising as an advanced Radar-IR stealth material. Besides, they exhibited dynamic tunable sensitivity, electrical conductivity, and electrothermal performance owing to the layered structure with metal-phase/semiconductor heterointerface, rich defects, and tunable porosity. Overall, the multifunctional V₃O₇·H₂O/VO₂(A) NB aerogels demonstrate significant potential for application in intelligent EM protection, Radar-IR stealth, and wearable strain sensing, particularly under extreme environmental conditions.

Key words: Aerogels of V₃O₇·H₂O/VO₂(A) nanobelts, Intelligent EM protection, Radar-IR stealth, Strain sensor, Heat management

Siyu Xie, Zhiqi Shen, Baoxin Fan, Kang Fu, Ziyi Wu, Sirun Yu, Junhao Diao, Qian Lin, Guoxiu Tong, Liyan Xie. Strain-triggered performance regulation in V₃O₇·H₂O/VO₂(A) nanobelt aerogels for intelligent EM protection, Radar-IR stealth, thermal management, and sensing applications[J]. J. Mater. Sci. Technol., 2026, 269: 33-45.

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Strain-triggered performance regulation in V₃O₇·H₂O/VO₂(A) nanobelt aerogels for intelligent EM protection, Radar-IR stealth, thermal management, and sensing applications

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