To counter the threat of hyperspectral detection, it is necessary to develop biomimetic materials to simulate the solar spectral reflection characteristics of plant leaf accurately. Two kinds of membranaceous yellow biomimetic materials were prepared by dispersing the particles of chrome titanium yellow and iron oxide yellow as fillers in polyvinyl alcohol films respectively. Reflectance and transmittance of the biomimetic materials were measured, and absorption and scattering coefficients of the biomimetic materials were inverted with a four-flux model. Results indicate that the biomimetic material adopting chrome titanium yellow particles can simulate the solar spectrum reflection characteristics of yellow leaf because of the similar absorption and scattering characteristics. The biomimetic material adopting iron oxide yellow particles cannot simulate the spectrum reflection characteristics of yellow leaf near the wavelength of 900 nm due to the characteristic absorption of the iron oxide. When the volume fraction of the chrome titanium yellow particles is lower than 2.12%, the absorption and scattering coefficients both increase approximately linearly with the volume fraction, indicating that the particles can scatter radiation independently. Therefore, the reflectance of the biomimetic material can be regulated through linearly changing of the volume fraction of the chrome titanium yellow particles.
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This work was funded by the National Natural Science Foundation (No. 51576188).
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Xu, K., Lin, Y., Wei, X. et al. Biomimetic Material Simulating Solar Spectrum Reflection Characteristics of Yellow Leaf. J Bionic Eng 15, 741–750 (2018). https://doi.org/10.1007/s42235-018-0062-4