Structure and dynamics of dense colloidal ellipsoids at the nearest-neighbor length scale
Pal, Antara LU ; Kamal, Md Arif LU ; Holmqvist, Peter LU and Schurtenberger, Peter LU
(2021)
In Physical Review Research
3(2).
- Abstract
Anisotropic particles are known to exhibit a richer and more complex phase behavior in comparison to their spherical counterpart. While the majority of the existing studies address structural properties, the dynamic behavior of anisotropic particles is a relatively lesser explored avenue. Using multispeckle ultra-small-angle x-ray photon correlation spectroscopy (USA-XPCS), we have carried out a systematic investigation of the structural and dynamic properties of colloidal ellipsoids at the nearest-neighbor length scale. The USA-XPCS measurements have allowed us to probe, as a function of the volume fraction, the q-dependent effective structure factor, Seff(q), along with the effective long time diffusion coefficient, Deff(q), for this... (More)
Anisotropic particles are known to exhibit a richer and more complex phase behavior in comparison to their spherical counterpart. While the majority of the existing studies address structural properties, the dynamic behavior of anisotropic particles is a relatively lesser explored avenue. Using multispeckle ultra-small-angle x-ray photon correlation spectroscopy (USA-XPCS), we have carried out a systematic investigation of the structural and dynamic properties of colloidal ellipsoids at the nearest-neighbor length scale. The USA-XPCS measurements have allowed us to probe, as a function of the volume fraction, the q-dependent effective structure factor, Seff(q), along with the effective long time diffusion coefficient, Deff(q), for this anisotropic system. Our results indicate a scaling behavior of Deff(q) with 1/Seff(q) from which we have estimated the effective amplitude function Aeff(q), which can be directly related to the effective hydrodynamic function Heff(q). Aeff(q) shows a similar q dependence to that of S(q). Our investigation also allows for the precise determination of the volume fraction corresponding to the arrest transition.
(Less)
- author
- Pal, Antara
LU
; Kamal, Md Arif
LU
; Holmqvist, Peter
LU
and Schurtenberger, Peter
LU
- organization
- publishing date
- 2021-06
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Research
- volume
- 3
- issue
- 2
- article number
- 023254
- publisher
- American Physical Society
- external identifiers
-
- scopus:85115902240
- ISSN
- 2643-1564
- DOI
- 10.1103/PhysRevResearch.3.023254
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
- id
- ae5889e0-4626-4dba-8ef9-5e8db2b9b637
- date added to LUP
- 2021-10-14 13:33:11
- date last changed
- 2022-04-27 04:48:38
@article{ae5889e0-4626-4dba-8ef9-5e8db2b9b637,
abstract = {{<p>Anisotropic particles are known to exhibit a richer and more complex phase behavior in comparison to their spherical counterpart. While the majority of the existing studies address structural properties, the dynamic behavior of anisotropic particles is a relatively lesser explored avenue. Using multispeckle ultra-small-angle x-ray photon correlation spectroscopy (USA-XPCS), we have carried out a systematic investigation of the structural and dynamic properties of colloidal ellipsoids at the nearest-neighbor length scale. The USA-XPCS measurements have allowed us to probe, as a function of the volume fraction, the q-dependent effective structure factor, Seff(q), along with the effective long time diffusion coefficient, Deff(q), for this anisotropic system. Our results indicate a scaling behavior of Deff(q) with 1/Seff(q) from which we have estimated the effective amplitude function Aeff(q), which can be directly related to the effective hydrodynamic function Heff(q). Aeff(q) shows a similar q dependence to that of S(q). Our investigation also allows for the precise determination of the volume fraction corresponding to the arrest transition. </p>}},
author = {{Pal, Antara and Kamal, Md Arif and Holmqvist, Peter and Schurtenberger, Peter}},
issn = {{2643-1564}},
language = {{eng}},
number = {{2}},
publisher = {{American Physical Society}},
series = {{Physical Review Research}},
title = {{Structure and dynamics of dense colloidal ellipsoids at the nearest-neighbor length scale}},
url = {{http://dx.doi.org/10.1103/PhysRevResearch.3.023254}},
doi = {{10.1103/PhysRevResearch.3.023254}},
volume = {{3}},
year = {{2021}},
}