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Liquid-like behaviours of metallic glassy nanoparticles at room temperature.

ABSTRACT: Direct atomic-scale observations and measurements on dynamics of amorphous metallic nanoparticles (a-NPs) are challenging owing to the insufficient consciousness to their striking characterizations and the difficulties in technological approaches. In this study, we observe coalescence process of the a-NPs at atomic scale. We measure the viscosity of the a-NPs through the particles coalescence by in situ method. We find that the a-NPs have fast dynamics, and the viscosity of the a-NPs exhibits a power law relationship with size of the a-NPs. The a-NPs with sizes smaller than 3?nm are in a supercooled liquid state and exhibit liquid-like behaviours with a decreased viscosity by four orders of magnitude lower than that of bulk glasses. These results reveal the intrinsic flow characteristics of glasses in low demension, and pave a way to understand the liquid-like behaviours of low dimension glass, and are also of key interest to develop size-controlled nanodevices.

SUBMITTER: Cao CR

PROVIDER: S-EPMC6488636 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Liquid-like behaviours of metallic glassy nanoparticles at room temperature.

Cao C R CR Huang K Q KQ Shi J A JA Zheng D N DN Wang W H WH Gu L L Bai H Y HY

Nature communications 20190429 1

Direct atomic-scale observations and measurements on dynamics of amorphous metallic nanoparticles (a-NPs) are challenging owing to the insufficient consciousness to their striking characterizations and the difficulties in technological approaches. In this study, we observe coalescence process of the a-NPs at atomic scale. We measure the viscosity of the a-NPs through the particles coalescence by in situ method. We find that the a-NPs have fast dynamics, and the viscosity of the a-NPs exhibits a ...[more]

PMID: 31036826

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