Particle-size-dependent acoustophoretic motion and depletion of micro- and nano-particles at long timescales
Qiu, Wei LU
; Bruus, Henrik
and Augustsson, Per
LU
(2020)
In Physical Review E
102(1).
- Abstract
- We present three-dimensional measurements of particle-size-dependent acoustophoretic motion of micropar- ticles with diameters from 4.8 μm down to 0.5 μm suspended in either homogeneous or inhomogeneous fluids inside a glass-silicon microchannel and exposed to a standing ultrasound wave. To study the crossover from radiation force dominated to streaming dominated motion as the particle size is decreased, we extend previous studies to long timescales, where the particles smaller than the crossover size move over distances comparable to the channel width. We observe a particle-size-dependent particle depletion at late times for the particles smaller than the crossover size. The mechanisms behind this depletion in homogeneous fluids are... (More)
- We present three-dimensional measurements of particle-size-dependent acoustophoretic motion of micropar- ticles with diameters from 4.8 μm down to 0.5 μm suspended in either homogeneous or inhomogeneous fluids inside a glass-silicon microchannel and exposed to a standing ultrasound wave. To study the crossover from radiation force dominated to streaming dominated motion as the particle size is decreased, we extend previous studies to long timescales, where the particles smaller than the crossover size move over distances comparable to the channel width. We observe a particle-size-dependent particle depletion at late times for the particles smaller than the crossover size. The mechanisms behind this depletion in homogeneous fluids are rationalized by numerical simulations which take the Brownian motion into account. Experimentally, the particle trajectories in inhomogeneous fluids show focusing in the bulk of the microchannel at early times, even for the particles below the critical size, which clearly demonstrates the potential to manipulate submicrometer particles. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/92ff1aa2-0d9f-46dd-a6e8-2254d012f61c
- author
- Qiu, Wei
LU
; Bruus, Henrik
and Augustsson, Per
LU
- organization
- publishing date
- 2020-07-21
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review E
- volume
- 102
- issue
- 1
- article number
- 013108
- pages
- 11 pages
- publisher
- American Physical Society
- external identifiers
-
- scopus:85089352455
- pmid:32794927
- ISSN
- 2470-0045
- DOI
- 10.1103/PhysRevE.102.013108
- language
- English
- LU publication?
- yes
- id
- 92ff1aa2-0d9f-46dd-a6e8-2254d012f61c
- date added to LUP
- 2020-08-13 23:35:31
- date last changed
- 2022-04-19 00:07:57
@article{92ff1aa2-0d9f-46dd-a6e8-2254d012f61c,
abstract = {{We present three-dimensional measurements of particle-size-dependent acoustophoretic motion of micropar- ticles with diameters from 4.8 μm down to 0.5 μm suspended in either homogeneous or inhomogeneous fluids inside a glass-silicon microchannel and exposed to a standing ultrasound wave. To study the crossover from radiation force dominated to streaming dominated motion as the particle size is decreased, we extend previous studies to long timescales, where the particles smaller than the crossover size move over distances comparable to the channel width. We observe a particle-size-dependent particle depletion at late times for the particles smaller than the crossover size. The mechanisms behind this depletion in homogeneous fluids are rationalized by numerical simulations which take the Brownian motion into account. Experimentally, the particle trajectories in inhomogeneous fluids show focusing in the bulk of the microchannel at early times, even for the particles below the critical size, which clearly demonstrates the potential to manipulate submicrometer particles.}},
author = {{Qiu, Wei and Bruus, Henrik and Augustsson, Per}},
issn = {{2470-0045}},
language = {{eng}},
month = {{07}},
number = {{1}},
publisher = {{American Physical Society}},
series = {{Physical Review E}},
title = {{Particle-size-dependent acoustophoretic motion and depletion of micro- and nano-particles at long timescales}},
url = {{http://dx.doi.org/10.1103/PhysRevE.102.013108}},
doi = {{10.1103/PhysRevE.102.013108}},
volume = {{102}},
year = {{2020}},
}