Direct manipulation of diffusion in colloidal glasses via controlled generation of quasi-particle-like defects

We experimentally manipulate the structural relaxation of colloidal glass at an atomistically controlled position. We focus a laser beam to eject a particle from the colloidal system. This creates a void that transforms rapidly into a mobile soft spot (quasivoid) composed of a few neighboring free-volume fragments. The transformation and subsequent motions of the quasivoid trigger a sequence of well-connected stringlike motions emanating precisely from the point of laser action with free volumes flowing along the string. Furthermore, the sequence can be terminated by the annihilation of the quasivoid. The observations are supported by molecular dynamics (MD) simulations.

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Publication Details

Journal
Physical review. E
Published
2024-12-10
DOI
https://doi.org/10.1103/physreve.110.064603
Citations
2
Primary Topic
Material Dynamics and Properties
Type
article
Field-Weighted Citation Impact
0.23

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article

Direct manipulation of diffusion in colloidal glasses via controlled generation of quasi-particle-like defects

Anupam Kumar, Yunhong Shi, Cho‐Tung Yip, Chor‐Hoi Chan et al.
2 citations
Physical review. E
Material Dynamics and Properties
0.23
article

Direct manipulation of diffusion in colloidal glasses via controlled generation of quasi-particle-like defects

Anupam Kumar, Yunhong Shi, Cho‐Tung Yip, Chor‐Hoi Chan, Yuen Hong Tsang, M. K. Fung, Chi‐Hang Lam, Chu Xiao, Yidi Wang, Chun-Shing Lee, K. S. Lam, Bo Li
article en
2 citations

Abstract

We experimentally manipulate the structural relaxation of colloidal glass at an atomistically controlled position. We focus a laser beam to eject a particle from the colloidal system. This creates a void that transforms rapidly into a mobile soft spot (quasivoid) composed of a few neighboring free-volume fragments. The transformation and subsequent motions of the quasivoid trigger a sequence of well-connected stringlike motions emanating precisely from the point of laser action with free volumes flowing along the string. Furthermore, the sequence can be terminated by the annihilation of the quasivoid. The observations are supported by molecular dynamics (MD) simulations.

Physical review. EVol. 110(6)
Hong Kong Polytechnic University (HK), City University of Hong Kong (HK), Indian Institute of Technology Dhanbad (IN), Harbin Institute of Technology (CN)
National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province
Affordable and clean energy
Openalex Percentile: Top 49%
Material Dynamics and Properties
0.23
DOISourceOpenAlex
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Direct manipulation of diffusion in colloidal glasses via controlled generation of quasi-particle-like defects — Anupam Kumar, Yunhong Shi, et al. · Physical review. E (2024) | TGRS Research Map | TGRS