Autonomous self-repair in piezoelectric molecular crystals

被引：126

作者：

Bhunia, Surojit ^{[1
,2
]}

Chandel, Shubham ^{[3
]}

Karan, Sumanta Kumar ^{[4
]}

Dey, Somnath ^{[5
]}

Tiwari, Akash ^{[3
]}

Das, Susobhan ^{[1
]}

Kumar, Nishkarsh ^{[3
]}

Chowdhury, Rituparno ^{[1
]}

Mondal, Saikat ^{[1
,2
]}

Ghosh, Ishita ^{[1
]}

Mondal, Amit ^{[1
]}

Khatua, Bhanu Bhusan ^{[4
]}

Ghosh, Nirmalya ^{[3
]}

Reddy, C. Malla ^{[1
,2
]}

机构：

[1] Indian Inst Sci Educ & Res Kolkata, Dept Chem Sci, Nadia 741246, W Bengal, India

[2] Indian Inst Sci Educ & Res Kolkata, Ctr Adv Funct Mat, Nadia 741246, W Bengal, India

[3] Indian Inst Sci Educ & Res Kolkata, Dept Phys Sci, Nadia 741246, W Bengal, India

[4] Indian Inst Technol Kharagpur, Mat Sci Ctr, Kharagpur 721302, W Bengal, India

[5] Rhein Westfal TH Aachen, Inst Crystallog, D-52066 Aachen, Germany

来源：

SCIENCE | 2021年 / 373卷 / 6552期

关键词：

MUELLER MATRIX SPECTROSCOPY;

D O I：

10.1126/science.abg3886

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：321 / +

页数：54

共 37 条

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