Autonomous self-repair in piezoelectric molecular crystals

doi:10.1126/science.abg3886

GSTDTAP > 气候变化

DOI	10.1126/science.abg3886
	Autonomous self-repair in piezoelectric molecular crystals
	Surojit Bhunia; Shubham Chandel; Sumanta Kumar Karan; Somnath Dey; Akash Tiwari; Susobhan Das; Nishkarsh Kumar; Rituparno Chowdhury; Saikat Mondal; Ishita Ghosh; Amit Mondal; Bhanu Bhusan Khatua; Nirmalya Ghosh; C. Malla Reddy
	2021-07-16
发表期刊	Science
出版年	2021
英文摘要	The ability to autonomously restore shape or self-heal are useful properties that have been incorporated into a range of materials, including metals and polymers. Bhunia et al. found that both of these abilities could be achieved in piezoelectric molecular crystals, specifically bipyrazole organic crystals. When the crystals are fractured, they develop charged surfaces that attract each other, drawing the two faces together to enable self-repair as long as they remain within a critical distance of each other. The effect can also be seen in other noncentrosymmetric piezoelectric crystals. Science , abg3886, this issue p. [321][1] 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. [1]: /lookup/doi/10.1126/science.abg3886
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/334386
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Surojit Bhunia,Shubham Chandel,Sumanta Kumar Karan,et al. Autonomous self-repair in piezoelectric molecular crystals[J]. Science,2021.
APA	Surojit Bhunia.,Shubham Chandel.,Sumanta Kumar Karan.,Somnath Dey.,Akash Tiwari.,...&C. Malla Reddy.(2021).Autonomous self-repair in piezoelectric molecular crystals.Science.
MLA	Surojit Bhunia,et al."Autonomous self-repair in piezoelectric molecular crystals".Science (2021).