Surface mobility gradient and emergent facilitation in glassy films
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911877783617536 |
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| author | Zhai, Qiang Gao, Xin-Yuan Lee, Chun-Shing Ong, Chin-Yuan Yan, Ke Deng, Hai-Yao Yang, Sen Lam, Chi-Hang |
| author_facet | Zhai, Qiang Gao, Xin-Yuan Lee, Chun-Shing Ong, Chin-Yuan Yan, Ke Deng, Hai-Yao Yang, Sen Lam, Chi-Hang |
| contents | Confining glassy polymer into films can substantially modify their local and film-averaged properties. We present a lattice model of film geometry with void-mediated facilitation behaviors but free from any elasticity effect. We analyze the spatially varying viscosity to delineate the transport property of glassy films. The film mobility measurements reported by [Yang et. al., Science, 2010, 328, 1676] are successfully reproduced. The flow exhibits a crossover from simple viscous flow to a surface-dominated regime as temperature decreases. The propagation of a highly mobile front induced by the free surface is visualized in real space. Our approach provides a microscopic treatment of the observed glassy phenomena. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_11210 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Surface mobility gradient and emergent facilitation in glassy films Zhai, Qiang Gao, Xin-Yuan Lee, Chun-Shing Ong, Chin-Yuan Yan, Ke Deng, Hai-Yao Yang, Sen Lam, Chi-Hang Soft Condensed Matter Disordered Systems and Neural Networks Confining glassy polymer into films can substantially modify their local and film-averaged properties. We present a lattice model of film geometry with void-mediated facilitation behaviors but free from any elasticity effect. We analyze the spatially varying viscosity to delineate the transport property of glassy films. The film mobility measurements reported by [Yang et. al., Science, 2010, 328, 1676] are successfully reproduced. The flow exhibits a crossover from simple viscous flow to a surface-dominated regime as temperature decreases. The propagation of a highly mobile front induced by the free surface is visualized in real space. Our approach provides a microscopic treatment of the observed glassy phenomena. |
| title | Surface mobility gradient and emergent facilitation in glassy films |
| topic | Soft Condensed Matter Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2402.11210 |