Living tissue uses stress-accumulated electrical charge to close wounds. Self-repairing synthetic materials, which are typically soft and amorphous, usually require external stimuli, prolonged physical contact, and long healing times. We overcome many of these limitations in piezoelectric bipyrazole organic crystals, which recombine following mechanical fracture without any external direction, autonomously self-healing in milliseconds with crystallographic precision. Kelvin probe force microscopy, birefringence experiments, and atomic-resolution structural studies reveal that these noncentrosymmetric crystals, with a combination of hydrogen bonds and dispersive interactions, develop large stress-induced opposite electrical charges on fracture surfaces, prompting an electrostatically driven precise recombination of the pieces via diffusionless self-healing.

活组织使用压力累积的电荷来闭合伤口。自修复合成材料通常是柔软和无定形的，通常需要外部刺激、长时间的身体接触和较长的愈合时间。我们克服了压电双吡唑有机晶体的许多这些限制，它们在没有任何外部方向的机械断裂后重新组合，在几毫秒内以晶体精度自主自愈。开尔文探针力显微镜、双折射实验和原子分辨率结构研究表明，这些非中心对称晶体结合了氢键和色散相互作用，在断裂面上产生了大量应力诱导的相反电荷，