Observation of the Pinning-Induced Crystal-Hexatic-Glass Transition in Two-Dimensional Colloidal Suspensions

孙晓燕; 王华光; 冯浩; 张泽新; 马余强

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Observation of the Pinning-Induced Crystal-Hexatic-Glass Transition in Two-Dimensional Colloidal Suspensions

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Identification of the glass formation process in various conditions is of importance for fundamental understanding of the mechanism of glass transitions as well as for developments and applications of glassy materials.We investigate the role of pinning in driving the transformation of crystal into glass in two-dimensional colloidal suspensions of monodisperse microspheres.The pinning is produced by immobilizing a fraction of microspheres on the substrate of sample cells where the mobile microspheres sediment.Structurally,the crystal-hexatic-glass transition occurs with increasing the number fraction of pinningρpinning,and the orientational correlation exhibits a change from quasi-long-range to short-range order atρpinning=0.02.Interestingly,the dynamics shows a nonmonotonic change with increasing the fraction of pinning.This is due to the competition between the disorder that enhances the dynamics and the pinning that hinders the particle motions.Our work highlights the important role of the pinning on the colloidal glass transition,which not only provides a new strategy to prevent crystallization forming glass,but also is helpful for understanding of the vitrification in colloidal systems.

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《中国物理快报：英文版》 |2021年第10期|17-21|共5页
作者
孙晓燕; 王华光; 冯浩; 张泽新; 马余强;
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作者单位

Department of Optoelectronics and Energy Engineering;

City College of Suzhou;

Suzhou 215104;

China;

College of Chemistry;

Chemical Engineering and Materials Science;

Soochow University;

Suzhou 215123;

China;

Center for Soft Condensed Matter Physics and Interdisciplinary Research;

Soochow University;

Suzhou 215006;

China;

National Laboratory of Solid State Microstructures and Department of Physics;

Nanjing University;

Nanjing 210093;

China;

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原文格式 PDF
正文语种 chi
中图分类各种玻璃产品;
关键词
materials; crystal; Transition;

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Observation of the Pinning-Induced Crystal-Hexatic-Glass Transition in Two-Dimensional Colloidal Suspensions

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