Differential Dynamic Microscopy for Anisotropic Colloidal Dynamics
Reufer, Mathias ; Martinez, Vincent A. ; Schurtenberger, Peter LU
and Poon, Wilson C. K.
(2012)
In Langmuir
28(10).
p.4618-4624
- Abstract
- Differential dynamic microscopy (DDM) is a low-cost, high-throughput technique recently developed for characterizing the isotropic diffusion of spherical colloids using white-light optical microscopy.(1) We develop the theory for applying DDM to probe the dynamics of anisotropic colloidal samples such as various ordered phases, or particles interacting with an external field. The q-dependent dynamics can be measured in any direction in the image plane. We demonstrate the method on a dilute aqueous dispersion of anisotropic magnetic particles (hematite) aligned in a magnetic field. The measured diffusion coefficients parallel and perpendicular to the field direction are in good agreement with theoretical values. We show how these... (More)
- Differential dynamic microscopy (DDM) is a low-cost, high-throughput technique recently developed for characterizing the isotropic diffusion of spherical colloids using white-light optical microscopy.(1) We develop the theory for applying DDM to probe the dynamics of anisotropic colloidal samples such as various ordered phases, or particles interacting with an external field. The q-dependent dynamics can be measured in any direction in the image plane. We demonstrate the method on a dilute aqueous dispersion of anisotropic magnetic particles (hematite) aligned in a magnetic field. The measured diffusion coefficients parallel and perpendicular to the field direction are in good agreement with theoretical values. We show how these measurements allow us to extract the orientational order parameter S-2 of the system. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2591140
- author
- Reufer, Mathias
; Martinez, Vincent A.
; Schurtenberger, Peter
LU
and Poon, Wilson C. K.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 28
- issue
- 10
- pages
- 4618 - 4624
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000301397100005
- scopus:84858237692
- pmid:22324390
- ISSN
- 0743-7463
- DOI
- 10.1021/la204904a
- language
- English
- LU publication?
- yes
- id
- 4fb11f6d-bae7-47f3-83a2-7cbace90a099 (old id 2591140)
- date added to LUP
- 2016-04-01 11:14:55
- date last changed
- 2022-03-27 23:25:09
@article{4fb11f6d-bae7-47f3-83a2-7cbace90a099,
abstract = {{Differential dynamic microscopy (DDM) is a low-cost, high-throughput technique recently developed for characterizing the isotropic diffusion of spherical colloids using white-light optical microscopy.(1) We develop the theory for applying DDM to probe the dynamics of anisotropic colloidal samples such as various ordered phases, or particles interacting with an external field. The q-dependent dynamics can be measured in any direction in the image plane. We demonstrate the method on a dilute aqueous dispersion of anisotropic magnetic particles (hematite) aligned in a magnetic field. The measured diffusion coefficients parallel and perpendicular to the field direction are in good agreement with theoretical values. We show how these measurements allow us to extract the orientational order parameter S-2 of the system.}},
author = {{Reufer, Mathias and Martinez, Vincent A. and Schurtenberger, Peter and Poon, Wilson C. K.}},
issn = {{0743-7463}},
language = {{eng}},
number = {{10}},
pages = {{4618--4624}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Differential Dynamic Microscopy for Anisotropic Colloidal Dynamics}},
url = {{http://dx.doi.org/10.1021/la204904a}},
doi = {{10.1021/la204904a}},
volume = {{28}},
year = {{2012}},
}