Programmable microfluidics for dynamic multiband camouflage

查看全文 作　　者：Chunzao [1]Feng;Mingran [1]Mao;Xiaohui [1]Zhang;Yutian [1]Liao;Xiaohui [1]Xiao;Huidong [1]Liu;Kang [1]Liu 机构地区：[1]MOE Key Laboratory of Hydraulic Machinery Transients,School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072 Hubei,China 出　　处：《Microsystems & Nanoengineering》索引2023年第9卷第2期,共8页 基　　金：supported by the National Natural Science Foundation of China(62161160311,51976141,52002291);the Postdoctoral Innovation Talent Support Program(BX20190254). 摘　　要：Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions.In this work,we propose a programmable microfluidic strategy that uses dye molecules in layered fluids to manipulate visible light-and infrared-semitransparent solvent to manipulate infrared light.With three primary fluid inputs,we achieve 64 chromaticity values and 8 emissivities from 0.42 to 0.90.In view of the wide tuning range,we demonstrate that the microfluidic flm can dynamically change its surface reflectance to blend into varying backgrounds in both visible and infrared images.Moreover,we fabricate the microfluidic device in a textile form and demonstrate its ability to match exactly with the colors of natural leaves of different seasons in the full hyperspectrum range.Considering the broadband modulation and ease of operation,the programmable microfluidic strategy provides a feasible approach for smart optical surfaces in long-span optical spectra. 关 键 词：MULTIBAND tuning VISIBLE