Ren Jie, Xie Chuwei, Zong Hao, Zhang Shufen, Wu Suli
Frontier Science Center for Smart Materials, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2# Linggong Road, Dalian, 116024, P. R. China.
School of Chemistry, Dalian University of Technology, 2# Linggong Road, Dalian, 116024, P. R. China.
Small. 2024 Dec;20(49):e2403549. doi: 10.1002/smll.202403549. Epub 2024 Sep 20.
It is important to develop low infrared (IR) emissive coating with tunable structure color to improve the infrared-visible stealth performance of military equipment. In this work, uniform ZnO spheres are used as building units to construct photonic structures with both bright adjustable structure color and low IR emissivity due to the relatively high refractive index and low IR emissivity of ZnO. The vivid tunable structural colors are provided by the photonic bandgap of ZnO photonic crystals (PCs) or the quasi-bandgap of amorphous photonic crystals (APCs), respectively. Both ZnO PCs and APCs exhibited low IR emissivity in 3-5 µm. The IR emissivity of 255 nm ZnO PC is 0.483 and the IR emissivity of 255 nm ZnO APC is 0.492 at 25 °C. With the increase of temperature, the IR emissivity of further decreased to 0.295 and 0.312 at 300 °C. These structures can be applied to a variety of surfaces, and all these structures have good thermal and light stability as well. This work may open a simple and effective way to fabricate materials with good infrared-visible stealth performance, expanding the application of ZnO PCs and APCs coatings in the camouflage area.
开发具有可调结构颜色的低红外（IR）发射涂层对于提高军事装备的红外-可见光隐身性能至关重要。在这项工作中，由于ZnO具有相对较高的折射率和低红外发射率，因此将均匀的ZnO球体用作构建单元来构建具有明亮可调结构颜色和低红外发射率的光子结构。生动的可调结构颜色分别由ZnO光子晶体（PCs）的光子带隙或非晶光子晶体（APCs）的准带隙提供。ZnO PCs和APCs在3-5μm范围内均表现出低红外发射率。在25℃时，255nm ZnO PC的红外发射率为0.483，255nm ZnO APC的红外发射率为0.492。随着温度升高，在300℃时，其红外发射率进一步降至0.295和0.312。这些结构可应用于各种表面，并且所有这些结构也都具有良好的热稳定性和光稳定性。这项工作可能会开辟一种简单有效的方法来制造具有良好红外-可见光隐身性能的材料，扩大ZnO PCs和APCs涂层在伪装领域的应用。
