采用反射光谱、扫描电镜及理论模拟计算对三角帆蚌韧带的结构色及微结构进行了较为系统的研究.结果表明：韧带从湿润到干燥状态，其反射峰波长从460nm蓝移至423nm，且反射峰强度逐渐降低，相应的颜色从蓝色转变为背景色褐色.韧带的结构色是由韧带中定向排列的文石纤维和蛋白质构成的二维光子结构引起的，该结构中文石纤维粒径为(122±14)nm，相邻文石纤维中心间距为(133±15)nm.水对韧带的反射峰强度及光子带隙范围具有明显的调节作用，可见韧带具有湿敏性二维可调光子带隙结构特征，属于一种天然的湿敏性二维可调光子带隙材料.
The structural color and microstructure of the bivalve ligament of Hyriopsis cunimgii were investigated by reflection spectra, scanning electron microscope and theoretical simulation. The results are listed as follows, reflection peak wavelength of the ligament blue-shifts from 460nm to 423nm with the increase of air drying time from 0 to 60min, and the reflectivity decreases gradually, relevant color changes from blue to brown background color. The structural color in the ligament is produced by the 2D photonic structure consisting of aligned aragonite fibers and proteins, in which the diameter of aragonite fiber and the inter-fiber spacing is (122±14)nm and (133±15nm, respectively. Water can reversibly tune the reflectivity of reflection peak and the scope of photonic band gap (PBG), revealing that the ligament is characteristic of humidity sensitive 2D tunable PBG structure. It is concluded that the ligament belongs to the natural humidity sensitive 2D tunable PBG material.
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