Key Laboratory of Inorganic Nanomaterials of Hebei Province, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, 050024, P.R. China.
Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, P.R. China.
Angew Chem Int Ed Engl. 2017 Aug 21;56(35):10462-10466. doi: 10.1002/anie.201705462. Epub 2017 Jul 24.
Structural colors have profound implications in the fields of pigments, displays and sensors, but none of the current non-iridescent photonic materials can restore their functions after mechanical damage. Herein, we report the first self-healable organogel nanocomposites with angle-independent structural colors. The organogel nanocomposites were prepared through the co-assembly of oleophilic silica nanoparticles, silicone-based supramolecular gels, and carbon black. The organogel system enables amorphous aggregation of silica nanoparticles and the angle-independent structural colors in the nanocomposites. Moreover, the hydrogen bonding in the supramolecular gel provides self-healing ability to the system, and the structural colored films obtained could heal themselves in tens of seconds to restore storage modulus, structural color, and surface slipperiness from mechanical cuts or shear failure repeatedly.
结构色在颜料、显示器和传感器领域具有深远的意义，但目前没有任何非虹彩的光子材料可以在机械损伤后恢复其功能。在此，我们报告了第一个具有角度无关结构色的自修复有机凝胶纳米复合材料。该有机凝胶纳米复合材料是通过亲油二氧化硅纳米粒子、硅基超分子凝胶和炭黑的共组装制备的。该有机凝胶体系使二氧化硅纳米粒子无定形聚集，并在纳米复合材料中产生角度无关的结构色。此外，超分子凝胶中的氢键为体系提供了自修复能力，所得结构色薄膜可以在数十秒内自我修复，从机械切割或剪切失效中反复恢复储能模量、结构色和表面滑溜性。
