Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids
We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational...
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| Autor*in: |
Vivek, Skanda [verfasserIn] |
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| Format: |
Artikel |
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| Erschienen: |
2017 |
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| Rechteinformationen: |
Nutzungsrecht: © Author(s) |
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| Übergeordnetes Werk: |
Enthalten in: The journal of chemical physics - Melville, NY : AIP, 1933, 147(2017), 13 |
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| Übergeordnetes Werk: |
volume:147 ; year:2017 ; number:13 |
| Links: |
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| DOI / URN: |
10.1063/1.4996733 |
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OLC1997216965 |
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| 520 | |a We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). | ||
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10.1063/1.4996733 doi PQ20171228 (DE-627)OLC1997216965 (DE-599)GBVOLC1997216965 (PRQ)a1090-92ad5076f5448270983d51c028a9fd7ca7c88145411d872209b5b8ec5cf16a40 (KEY)0048355920170000147001300000decouplingoftranslationalandrotationaldiffusioninq DE-627 ger DE-627 rakwb 540 530 DE-600 Vivek, Skanda verfasserin aut Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). Nutzungsrecht: © Author(s) Condensed Matter Soft Condensed Matter Weeks, Eric R oth Enthalten in The journal of chemical physics Melville, NY : AIP, 1933 147(2017), 13 (DE-627)129079049 (DE-600)3113-6 (DE-576)014411660 0021-9606 nnns volume:147 year:2017 number:13 http://dx.doi.org/10.1063/1.4996733 Volltext http://dx.doi.org/10.1063/1.4996733 http://arxiv.org/abs/1707.06160 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 GBV_ILN_2016 GBV_ILN_2279 AR 147 2017 13 |
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10.1063/1.4996733 doi PQ20171228 (DE-627)OLC1997216965 (DE-599)GBVOLC1997216965 (PRQ)a1090-92ad5076f5448270983d51c028a9fd7ca7c88145411d872209b5b8ec5cf16a40 (KEY)0048355920170000147001300000decouplingoftranslationalandrotationaldiffusioninq DE-627 ger DE-627 rakwb 540 530 DE-600 Vivek, Skanda verfasserin aut Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). Nutzungsrecht: © Author(s) Condensed Matter Soft Condensed Matter Weeks, Eric R oth Enthalten in The journal of chemical physics Melville, NY : AIP, 1933 147(2017), 13 (DE-627)129079049 (DE-600)3113-6 (DE-576)014411660 0021-9606 nnns volume:147 year:2017 number:13 http://dx.doi.org/10.1063/1.4996733 Volltext http://dx.doi.org/10.1063/1.4996733 http://arxiv.org/abs/1707.06160 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 GBV_ILN_2016 GBV_ILN_2279 AR 147 2017 13 |
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10.1063/1.4996733 doi PQ20171228 (DE-627)OLC1997216965 (DE-599)GBVOLC1997216965 (PRQ)a1090-92ad5076f5448270983d51c028a9fd7ca7c88145411d872209b5b8ec5cf16a40 (KEY)0048355920170000147001300000decouplingoftranslationalandrotationaldiffusioninq DE-627 ger DE-627 rakwb 540 530 DE-600 Vivek, Skanda verfasserin aut Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). Nutzungsrecht: © Author(s) Condensed Matter Soft Condensed Matter Weeks, Eric R oth Enthalten in The journal of chemical physics Melville, NY : AIP, 1933 147(2017), 13 (DE-627)129079049 (DE-600)3113-6 (DE-576)014411660 0021-9606 nnns volume:147 year:2017 number:13 http://dx.doi.org/10.1063/1.4996733 Volltext http://dx.doi.org/10.1063/1.4996733 http://arxiv.org/abs/1707.06160 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 GBV_ILN_2016 GBV_ILN_2279 AR 147 2017 13 |
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10.1063/1.4996733 doi PQ20171228 (DE-627)OLC1997216965 (DE-599)GBVOLC1997216965 (PRQ)a1090-92ad5076f5448270983d51c028a9fd7ca7c88145411d872209b5b8ec5cf16a40 (KEY)0048355920170000147001300000decouplingoftranslationalandrotationaldiffusioninq DE-627 ger DE-627 rakwb 540 530 DE-600 Vivek, Skanda verfasserin aut Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). Nutzungsrecht: © Author(s) Condensed Matter Soft Condensed Matter Weeks, Eric R oth Enthalten in The journal of chemical physics Melville, NY : AIP, 1933 147(2017), 13 (DE-627)129079049 (DE-600)3113-6 (DE-576)014411660 0021-9606 nnns volume:147 year:2017 number:13 http://dx.doi.org/10.1063/1.4996733 Volltext http://dx.doi.org/10.1063/1.4996733 http://arxiv.org/abs/1707.06160 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 GBV_ILN_2016 GBV_ILN_2279 AR 147 2017 13 |
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10.1063/1.4996733 doi PQ20171228 (DE-627)OLC1997216965 (DE-599)GBVOLC1997216965 (PRQ)a1090-92ad5076f5448270983d51c028a9fd7ca7c88145411d872209b5b8ec5cf16a40 (KEY)0048355920170000147001300000decouplingoftranslationalandrotationaldiffusioninq DE-627 ger DE-627 rakwb 540 530 DE-600 Vivek, Skanda verfasserin aut Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). Nutzungsrecht: © Author(s) Condensed Matter Soft Condensed Matter Weeks, Eric R oth Enthalten in The journal of chemical physics Melville, NY : AIP, 1933 147(2017), 13 (DE-627)129079049 (DE-600)3113-6 (DE-576)014411660 0021-9606 nnns volume:147 year:2017 number:13 http://dx.doi.org/10.1063/1.4996733 Volltext http://dx.doi.org/10.1063/1.4996733 http://arxiv.org/abs/1707.06160 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 GBV_ILN_2016 GBV_ILN_2279 AR 147 2017 13 |
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Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids |
| abstract |
We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). |
| abstractGer |
We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). |
| abstract_unstemmed |
We observe the translational and rotational diffusion of dimer tracer particles in quasi-2D colloidal samples. The dimers are in dense samples of two different sizes of spherical colloidal particles, with the area fraction ϕ of the particles varying from dilute to nearly glassy. At low ϕ, rotational and translational diffusion have a ratio set by the dimer size, as expected. At higher ϕ, dimers become caged by their neighboring particles, and both rotational and translational diffusion become slow. For short dimers, we observe rapid reorientations so that the rotational diffusion is faster than the translational diffusion: the two modes of diffusion are decoupled and have different ϕ dependence. Longer dimers do not exhibit fast rotations, and we find that their translational and rotational diffusion stay coupled for all ϕ. Our results bridge prior results that used spheres (very fast rotation) and long ellipsoids (very slow rotation). |
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13 |
| title_short |
Decoupling of translational and rotational diffusion in quasi-2D colloidal fluids |
| url |
http://dx.doi.org/10.1063/1.4996733 http://arxiv.org/abs/1707.06160 |
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| author2 |
Weeks, Eric R |
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| doi_str |
10.1063/1.4996733 |
| up_date |
2024-07-04T02:26:25.116Z |
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