Wu Zuoxu, Ai Xun, Wang Jian, Sun Xiaoyu, Li Derun, Mao Jun, Wang Xinyu, Zhang Qian, Cao Feng
Hubei Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Hubei Normal University, Huangshi 435002, China.
School of Science, and Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology, Shenzhen 518055, China.
ACS Appl Mater Interfaces. 2025 Aug 13;17(32):45999-46007. doi: 10.1021/acsami.5c07199. Epub 2025 Jul 30.
With the rapid advancements in optical and thermal imaging technologies, visible-compatible thermal camouflage technologies are pivotal for the survival of military devices and facilities. However, realizing adaptive thermal camouflage in dynamic scenes where the target temperature varies still remains a huge challenge in existing designs due to the limitation of insufficient ability to regulate radiative heat. Here, we proposed a visible-compatible adaptive infrared camouflage strategy employed by the WVO-based nanocavity structure to operate effectively across a wide temperature range of 30-70 °C. The adaptive camouflage is realized by the switchable selective radiation of the nanocavity structure, in which an environmentally compatible thermal radiation (∼100 W m) within the detection band is achieved, as well as the peak value of spectral emissivity within the nondetection band of 5-8 μm is switched from high (∼0.9) to low (∼0.3) as the temperature increases. With the dynamic couple of nanocavity resonance, outstanding thermal camouflage with negligible contrast (<7%) of radiative temperature between the sample and surroundings has been realized for the long-wave infrared band. Moreover, the designed camouflage coatings also demonstrate colorful appearance compatible to various surroundings. This straightforward WVO-based nanocavity structure offers a competitive strategy for visible-compatible adaptive thermal camouflage in practice.
随着光学和热成像技术的迅速发展，可见光兼容的热伪装技术对于军事装备和设施的生存至关重要。然而，由于调节辐射热的能力不足，在目标温度变化的动态场景中实现自适应热伪装在现有设计中仍然是一个巨大的挑战。在此，我们提出了一种基于WVO的纳米腔结构采用的可见光兼容自适应红外伪装策略，该策略能在30-70°C的宽温度范围内有效运行。自适应伪装是通过纳米腔结构的可切换选择性辐射实现的，其中在检测波段内实现了与环境兼容的热辐射（100 W/m），并且随着温度升高，在5-8μm非检测波段内的光谱发射率峰值从高（0.9）切换到低（~0.3）。通过纳米腔共振的动态耦合，在长波红外波段实现了出色的热伪装，样品与周围环境之间的辐射温度对比度可忽略不计（<7%）。此外，设计的伪装涂层还展示出与各种环境兼容的多彩外观。这种基于WVO的简单纳米腔结构在实际应用中为可见光兼容自适应热伪装提供了一种有竞争力的策略。
