Abstract
A brand-new approach to realizing visible-infrared compatible camouflage is proposed based on a metal-based graphical hetero-structure (MGHS) SiO2/Ag/ZnS/Ag. For different thicknesses (20, 40, and 60 nm) of color-controlling sub-layer, high-contract and large-span structure colors (yellow, navy, and cyan) were observed due to reintroducing constructive interference with a matching intensity of reflected waves. Ultra-low infrared emissivity values of 0.04, 0.05, and 0.04 (with high average reflectance values of 95.46%, 95.31%, and 95.09%) were obtained at 3–14 μm. In addition, the well-performing trisecting-circle structure further indicates that it is feasible to design on-demand compatible camouflage patterns using the easily-prepared MGHS.
Highlights
With the rapid development of modern detection industries, traditional single stealth approaches, such as visible-light camouflage [1,2] and infrared emissivity engineering [3,4,5,6], are severely threatened by dual- and multi-approach target detectors [7,8], which were proposed and practically applied in recent years
Complicated technology and non-controllable colors are still direct obstacles for the large-scale application of camouflage combined with various structure colors and ultra-low emissivity (ε)
Proportional bright and dark strips obtained by field emission scanning electron navy, and cyan, have been intuitively observed
Summary
With the rapid development of modern detection industries, traditional single stealth approaches, such as visible-light camouflage [1,2] and infrared emissivity engineering [3,4,5,6], are severely threatened by dual- and multi-approach target detectors [7,8], which were proposed and practically applied in recent years. A simplified composite hetero-structure SiO2 /Ag/ZnS/Ag was firstly proposed to make breakthroughs in the following three aspects: simplifying the process, reintroducing matching constructive interference for metallic film, and increasing infrared properties (Figure 1a). Materials 2018, 11, 1594 sub-layer (ZnS: 20, 40, or 60 nm) was subsequently deposited, mainly to realize a high-contract structurecolor colorbased based constructive interference. This means reintroducing obvious peaks and obvious of peaks and troughsreflection of the visible-light spectrum. ZnS1c) thicknesses (from to 90 nm, at intervals nm) This sub-layer can improve infrared reflectance simultaneously (Figure 1d). The reflection spectrum of different structures at (c) visible-light 380–780 nm 90 nm (interval: 10 nm).
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