Colloidal photonic crystals (CPCs) are extensively utilized in nanoscale light manipulation due to their periodic dielectric structure. However, achieving spatial reconfigurability in CPCs remains a significant challenge, despite its importance for broader photonic applications in colloidal science. In this study, an optically induced thermoelectric field is generated by adding ionic surfactants to the solution, leading to the efficient formation of tightly assembled nanoparticles that exhibit the characteristics of CPC, which is termed optothermo‐CPC. Specifically, this CPC exhibits excellent spatial reconfigurability through the tuning of the optically induced thermoelectric field. This allows for the remote control of its position and shape, in a real‐time and high‐precision manner. Additionally, by changing the particle size, it is possible to tune the transmission spectrum and color. Additionally, optothermo‐CPC can navigate obstacles and possess a robust self‐healing ability. These highly adaptable and reconfigurable properties endow CPCs with significant potential for various photonic applications within complex fluidic environments.

中文翻译：

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用于颜色和光谱操纵的光热可重构胶体光子晶体


胶体光子晶体 （CPC） 由于其周期性介电结构而被广泛用于纳米级光操纵。然而，尽管 CPC 对胶体科学中更广泛的光子应用很重要，但在 CPC 中实现空间可重构性仍然是一个重大挑战。在这项研究中，通过向溶液中添加离子表面活性剂来产生光诱导热电场，从而有效地形成具有 CPC 特性的紧密组装的纳米颗粒，这被称为光热 CPC。具体来说，该 CPC 通过调整光感应热电场表现出优异的空间可重构性。这允许以实时和高精度的方式远程控制其位置和形状。此外，通过改变颗粒大小，可以调整透射光谱和颜色。此外，optothermo-CPC 可以穿越障碍物并具有强大的自愈能力。这些高度适应性和可重构性使 CPC 在复杂流体环境中的各种光子应用中具有巨大潜力。