Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1TH, UK.
Department of Nanophotonics, International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal.
Sci Adv. 2018 Apr 11;4(4):eaan8917. doi: 10.1126/sciadv.aan8917. eCollection 2018 Apr.
Natural photonic crystals are responsible for strong reflectance at selective wavelengths in different natural systems. We demonstrate that intracellular opal-like photonic crystals formed from lipids within photosynthetic cells produce vivid structural color in the alga . The reflectance of the opaline vesicles is dynamically responsive to environmental illumination. The structural color is present in low light-adapted samples, whereas higher light levels produce a slow disappearance of the structural color such that it eventually vanishes completely. Once returned to low-light conditions, the color re-emerges. Our results suggest that these complex intracellular natural photonic crystals are responsive to environmental conditions, changing their packing structure reversibly, and have the potential to manipulate light for roles beyond visual signaling.
天然光子晶体使不同的自然系统在特定波长呈现强烈的反射。我们证明，在光合作用细胞内由脂质形成的类似蛋白石的细胞内光子晶体在藻类中产生鲜艳的结构色。蛋白石囊泡的反射率对环境光照具有动态响应。在低光适应的样本中存在结构色，而更高的光水平会导致结构色缓慢消失，最终完全消失。一旦回到低光条件下，颜色就会重新出现。我们的结果表明，这些复杂的细胞内天然光子晶体对环境条件有响应，能够可逆地改变其组装结构，并有可能操纵光以实现超越视觉信号的作用。
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