可见高吸收红外高反射薄膜制备及光学特性研究

doi:10.11949/j.issn.0438-1157.20190063

摘要/Abstract

摘要：

设计一种同时满足可见光波段高吸收和远红外波段高反射的特殊结构是制备红外低发射涂层的重要挑战。利用溅射镀膜法和化学合成法制备得到不同尺寸的金纳米颗粒(AuNPs)，完成了AuNPs/SiO₂/Al薄膜结构设计，并结合高级数值仿真软件对其结构进行理论分析，使用可见分光光度计和傅里叶红外光谱仪测试了其可见光和远红外波段反射谱，研究了等离激元模式在纳米复合结构薄膜中的应用。结果表明，金属纳米颗粒尺寸和介质层厚度对该薄膜的反射性能都有十分重要的影响，通过制备纳米复合材料，可见光波段吸收率达到64.07%，远红外波段反射率下降不超过2.29%。

关键词: 表面等离激元, 红外发射, 亮度, 异质结构, 数值模拟, 膜, 纳米结构

Abstract:

Designing a special structure that satisfies both the high absorption in the visible light band and the high reflection in the far infrared band is an important challenge in the preparation of infrared low emission coatings. The reflectance spectra of visible and far-infrared region were measured by UV-Vis spectrometer and Fourier transform infrared spectrometer. The results show that the size of the nanoparticles and the thickness of the dielectric layer influence the reflective performance of the film. The visible absorptivity is up to 64.07%, simultaneously the reflectance in the far-infrared region is not more than 2.29%.

Key words: surface plasmon polariton, infrared emissivity, lightness, heterostructures, numerical simulation, film, nanostructure

中图分类号:

TB 33

郭月莹, 谢建良, 彭波. 可见高吸收红外高反射薄膜制备及光学特性研究[J]. 化工学报, 2019, 70(6): 2325-2333.

Yueying GUO, Jianliang XIE, Bo PENG. Preparation and optical property study of plasmonic films with low infrared emissivity and low lightness[J]. CIESC Journal, 2019, 70(6): 2325-2333.

图/表 9

图1 AuNPs在溶液中的吸收光谱(黑、红色曲线分别代表直径为13 nm、45 nm的AuNPs吸收光谱)

Fig.1 Absorption spectrum of AuNPs in solution(black and red lines are absorption spectra of AuNPs of which diameters are 13 nm and 45 nm respectively)

图2 AuNPs的表面形貌图[AuNPs直径分别为13 nm(a)和45 nm(b)]

Fig.2 SEM images of 13 nm (a) and 45 nm (b) AuNPs

图3 AuNPs/SiO2/Al的表面形貌图及AuNPs粒径分布

Fig.3 SEM images and size distribution of AuNPs in AuNPs/SiO2/Al heterostructures

图4 AuNPs/SiO2/Al薄膜的吸收光谱和反射光谱

Fig.4 Absorption and reflectance spectrum of AuNPs/SiO2/Al

图5 AuNPs/SiO2/Al的仿真结构

Fig.5 Schematic picture of AuNPs/SiO2/Al heterostructures

图6 SiO2/Al结构的仿真吸收光谱和反射光谱

Fig.6 Absorption and reflectance spectrum simulation of SiO2/Al

图7 基于AuNPs/SiO2/Al结构的仿真吸收光谱和反射光谱

Fig.7 Simulation absorption and reflectance spectrum of AuNPs/SiO2/Al heterostructures

图8 基于AuNPs/SiO2/Al结构的电场分布

Fig.8 Electric field distribution of AuNPs/SiO2/Al heterostructures with AuNPs of 5 nm to 25 nm radius and 5 nm SiO2 films

图9 基于AuNPs/SiO2/Al结构的磁场分布

Fig.9 Magnetic field distribution of AuNPs/SiO2/Al with AuNPs of 5 nm to 25 nm radius and 5nm SiO2 films

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