1
|
Wiegerinck HTM, Wood JA, Eijkel JCT, Lammertink RGH, Frankel I, Ramos A. Continuous Focusing of Particles by AC-Electroosmosis and Induced Dipole Interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40. [PMID: 39269030 PMCID: PMC11428184 DOI: 10.1021/acs.langmuir.4c02135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 08/28/2024] [Accepted: 08/30/2024] [Indexed: 09/15/2024]
Abstract
Continuous particle focusing by using microfluidics is an effective method for separating particles, cells, or droplets for analytical purposes. Previously, it was shown that an alternating current across rectangular microchannels with slightly deformed side walls results in vortex flow patterns caused by alternating current electroosmosis (AC-EOF) and could lead to particle focusing. In this work, we explore this mechanism by experimentally studying the particle focusing behavior for various fluid flow velocities through a microchannel. Since it is unlikely that the particles are kept in their focused position solely by convection, a theoretical force balance between the hydrodynamic and the induced dipole force was determined. In our experiments, it was found that there is no substantial effect of the pressure-driven fluid velocity on the particle focusing velocity within the studied range. From the theoretical force balance calculations, it was determined that while the addition of the induced dipole force can still not completely describe the experimentally observed particle focusing, the induced dipole can be strong enough to overcome the hydrodynamic force. Finally, it is hypothesized that under specific circumstances, including a repulsive electrostatic force between a particle and electrode wall can complete the theoretical particle focusing force balance. Alternative phenomena that could also play a role in particle focusing are proposed.
Collapse
Affiliation(s)
- Harm T. M. Wiegerinck
- Soft
Matter, Fluidics and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands
| | - Jeffery A. Wood
- Soft
Matter, Fluidics and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands
| | - Jan C. T. Eijkel
- BIOS/The
Lab-on-a-Chip group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Rob G. H. Lammertink
- Soft
Matter, Fluidics and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands
| | - Itzchak Frankel
- Department
of Aerospace Engineering, Technion - Israel
Institute of Technology, Haifa 32000, Israel
| | - Antonio Ramos
- Departamento
de Electronica y Electromagnetismo, Universidad
de Sevilla, Avenida Reina Mercedes, s/n, 41012 Sevilla, Spain
| |
Collapse
|
2
|
Losserand S, Coupier G, Podgorski T. Migration velocity of red blood cells in microchannels. Microvasc Res 2019; 124:30-36. [PMID: 30831125 DOI: 10.1016/j.mvr.2019.02.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/18/2019] [Accepted: 02/18/2019] [Indexed: 11/25/2022]
Abstract
The lateral migration of red blood cells (RBCs) in confined channel flows is an important ingredient of microcirculatory hydrodynamics and is involved in the development of a cell free layer near vessel walls and influences the distribution of RBCs in networks. It is also relevant to a number of lab-on-chip applications. This migration is a consequence of their deformability and is due to the combined effects of hydrodynamic wall repulsion and the curvature of the fluid velocity profile. We performed microfluidic experiments with dilute suspensions of RBCs in which the trajectories and migration away from the channel wall are analyzed to extract the mean behavior, from which we propose a generic scaling law for the transverse migration velocity valid in a whole range of parameters relevant to microcirculatory and practical situations. Experiments with RBCs of different mechanical properties (separated by density gradient sedimentation or fixed with glutaraldehyde) show the influence of this parameter which can induce significant dispersion of the trajectories.
Collapse
Affiliation(s)
| | - Gwennou Coupier
- Université Grenoble Alpes, CNRS, LIPhy, Grenoble F-38000, France
| | - Thomas Podgorski
- Université Grenoble Alpes, CNRS, LIPhy, Grenoble F-38000, France
| |
Collapse
|
3
|
Liot O, Socol M, Garcia L, Thiéry J, Figarol A, Mingotaud AF, Joseph P. Transport of nano-objects in narrow channels: influence of Brownian diffusion, confinement and particle nature. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:234001. [PMID: 29701609 DOI: 10.1088/1361-648x/aac0af] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This paper presents experimental results about transport of dilute suspensions of nano-objects in silicon-glass micrometric and sub-micrometric channels. Two kinds of objects are used: solid, rigid latex beads and spherical capsule-shaped, soft polymersomes. They are tracked using fluorescence microscopy. Three aspects are studied: confinement (ratio between particle diameter and channel depth), Brownian diffusion and particle nature. The aim of this work is to understand how these different aspects affect the transport of suspensions in narrow channels and to understand the different mechanisms at play. Concerning the solid beads we observe the appearance of two regimes, one where the experimental mean velocity is close to the expected one and another where this velocity is lower. This is directly related to a competition between confinement, Brownian diffusion and advection. These two regimes are shown to be linked to the inhomogeneity of particles distribution in the channel depth, which we experimentally deduce from velocity distributions. This inhomogeneity appears during the entrance process into the sub-micrometric channels, as for hydrodynamic separation or deterministic lateral displacement. Concerning the nature of the particles we observed a shift of transition towards the second regime likely due to the relationships between shear stress and polymersomes mechanical properties which could reduce the inhomogeneity imposed by the geometry of our device.
Collapse
Affiliation(s)
- O Liot
- LAAS-CNRS, Université de Toulouse, CNRS UPR 8001, Toulouse, France. Fédération FERMaT, INPT, Toulouse, France
| | | | | | | | | | | | | |
Collapse
|
4
|
Pieprzyk S, Heyes DM, Brańka AC. Spatially dependent diffusion coefficient as a model for pH sensitive microgel particles in microchannels. BIOMICROFLUIDICS 2016; 10:054118. [PMID: 27795750 PMCID: PMC5065575 DOI: 10.1063/1.4964935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 10/04/2016] [Indexed: 05/23/2023]
Abstract
Solute transport and intermixing in microfluidic devices is strongly dependent on diffusional processes. Brownian Dynamics simulations of pressure-driven flow of model microgel particles in microchannels have been carried out to explore these processes and the factors that influence them. The effects of a pH-field that induces a spatial dependence of particle size and consequently the self-diffusion coefficient and system thermodynamic state were focused on. Simulations were carried out in 1D to represent some of the cross flow dependencies, and in 2D and 3D to include the effects of flow and particle concentration, with typical stripe-like diffusion coefficient spatial variations. In 1D, the mean square displacement and particle displacement probability distribution function agreed well with an analytically solvable model consisting of infinitely repulsive walls and a discontinuous pH-profile in the middle of the channel. Skew category Brownian motion and non-Gaussian dynamics were observed, which follows from correlations of step lengths in the system, and can be considered to be an example of so-called "diffusing diffusivity." In Poiseuille flow simulations, the particles accumulated in regions of larger diffusivity and the largest particle concentration throughput was found when this region was in the middle of the channel. The trends in the calculated cross-channel diffusional behavior were found to be very similar in 2D and 3D.
Collapse
Affiliation(s)
- S Pieprzyk
- Institute of Molecular Physics, Polish Academy of Sciences , M. Smoluchowskiego 17, 60-179 Poznań, Poland
| | - D M Heyes
- Department of Physics, Royal Holloway, University of London , Egham, Surrey TW20 0EX, United Kingdom
| | - A C Brańka
- Institute of Molecular Physics, Polish Academy of Sciences , M. Smoluchowskiego 17, 60-179 Poznań, Poland
| |
Collapse
|
5
|
de Graaf J, Peter T, Fischer LP, Holm C. The Raspberry model for hydrodynamic interactions revisited. II. The effect of confinement. J Chem Phys 2015; 143:084108. [PMID: 26328819 DOI: 10.1063/1.4928503] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The so-called "raspberry" model refers to the hybrid lattice-Boltzmann (LB) and Langevin molecular dynamics schemes for simulating the dynamics of suspensions of colloidal particles, originally developed by Lobaskin and Dünweg [New J. Phys. 6, 54 (2004)], wherein discrete surface points are used to achieve fluid-particle coupling. In this paper, we present a follow up to our study of the effectiveness of the raspberry model in reproducing hydrodynamic interactions in the Stokes regime for spheres arranged in a simple-cubic crystal [Fischer et al., J. Chem. Phys. 143, 084107 (2015)]. Here, we consider the accuracy with which the raspberry model is able to reproduce such interactions for particles confined between two parallel plates. To this end, we compare our LB simulation results to established theoretical expressions and finite-element calculations. We show that there is a discrepancy between the translational and rotational mobilities when only surface coupling points are used, as also found in Part I of our joint publication. We demonstrate that adding internal coupling points to the raspberry can be used to correct said discrepancy in confining geometries as well. Finally, we show that the raspberry model accurately reproduces hydrodynamic interactions between a spherical colloid and planar walls up to roughly one LB lattice spacing.
Collapse
Affiliation(s)
- Joost de Graaf
- Institute for Computational Physics (ICP), University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Toni Peter
- Institute for Computational Physics (ICP), University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Lukas P Fischer
- Institute for Computational Physics (ICP), University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Christian Holm
- Institute for Computational Physics (ICP), University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| |
Collapse
|
6
|
Astefanei A, Kok WT, Bäuerlein P, Núñez O, Galceran MT, de Voogt P, Schoenmakers PJ. Characterization of aggregates of surface modified fullerenes by asymmetrical flow field-flow fractionation with multi-angle light scattering detection. J Chromatogr A 2015; 1408:197-206. [DOI: 10.1016/j.chroma.2015.07.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 11/26/2022]
|
7
|
Adverse-Mode FFF: Multi-Force Ideal Retention Theory. CHROMATOGRAPHY 2015. [DOI: 10.3390/chromatography2030392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
8
|
Ranchon H, Picot V, Bancaud A. Metrology of confined flows using wide field nanoparticle velocimetry. Sci Rep 2015; 5:10128. [PMID: 25974654 PMCID: PMC4431396 DOI: 10.1038/srep10128] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 03/31/2015] [Indexed: 01/10/2023] Open
Abstract
The manipulation of fluids in micro/nanofabricated systems opens new avenues to engineer the transport of matter at the molecular level. Yet the number of methods for the in situ characterization of fluid flows in shallow channels is limited. Here we establish a simple method called nanoparticle velocimetry distribution analysis (NVDA) that relies on wide field microscopy to measure the flow rate and channel height based on the fitting of particle velocity distributions along and across the flow direction. NVDA is validated by simulations, showing errors in velocity and height determination of less than 1% and 8% respectively, as well as with experiments, in which we monitor the behavior of 200 nm nanoparticles conveyed in channels of ~1.8 μm in height. We then show the relevance of this assay for the characterization of flows in bulging channels, and prove its suitability to characterize the concentration of particles across the channel height in the context of visco-elastic focusing. Our method for rapid and quantitative flow characterization has therefore a broad spectrum of applications in micro/nanofluidics, and a strong potential for the optimization of Lab-on-Chips modules in which engineering of confined transport is necessary.
Collapse
Affiliation(s)
- Hubert Ranchon
- 1] CNRS, LAAS, 7 avenue du colonel Roche, F-31400 Toulouse, France [2] Univ de Toulouse, LAAS, F-31400 Toulouse, France
| | - Vincent Picot
- 1] CNRS, LAAS, 7 avenue du colonel Roche, F-31400 Toulouse, France [2] Univ de Toulouse, LAAS, F-31400 Toulouse, France
| | - Aurélien Bancaud
- 1] CNRS, LAAS, 7 avenue du colonel Roche, F-31400 Toulouse, France [2] Univ de Toulouse, LAAS, F-31400 Toulouse, France
| |
Collapse
|
9
|
Retention ratio and nonequilibrium bandspreading in asymmetrical flow field-flow fractionation. Anal Bioanal Chem 2015; 407:4327-38. [DOI: 10.1007/s00216-015-8734-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 04/16/2015] [Accepted: 04/22/2015] [Indexed: 10/23/2022]
|
10
|
Shendruk TN, Tahvildari R, Catafard NM, Andrzejewski L, Gigault C, Todd A, Gagne-Dumais L, Slater GW, Godin M. Field-flow fractionation and hydrodynamic chromatography on a microfluidic chip. Anal Chem 2013; 85:5981-8. [PMID: 23650976 DOI: 10.1021/ac400802g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We present gravitational field-flow fractionation and hydrodynamic chromatography of colloids eluting through 18 μm microchannels. Using video microscopy and mesoscopic simulations, we investigate the average retention ratio of colloids with both a large specific weight and neutral buoyancy. We consider the entire range of colloid sizes, including particles that barely fit in the microchannel and nanoscopic particles. Ideal theory predicts four operational modes, from hydrodynamic chromatography to Faxén-mode field-flow fractionation. We experimentally demonstrate, for the first time, the existence of the Faxén-mode field-flow fractionation and the transition from hydrodynamic chromatography to normal-mode field-flow fractionation. Furthermore, video microscopy and simulations show that the retention ratios are largely reduced above the steric-inversion point, causing the variation of the retention ratio in the steric- and Faxén-mode regimes to be suppressed due to increased drag. We demonstrate that theory can accurately predict retention ratios if hydrodynamic interactions with the microchannel walls (wall drag) are added to the ideal theory. Rather than limiting the applicability, these effects allow the microfluidic channel size to be tuned to ensure high selectivity. Our findings indicate that particle velocimetry methods must account for the wall-induced lag when determining flow rates in highly confining systems.
Collapse
Affiliation(s)
- Tyler N Shendruk
- Department of Physics, University of Ottawa, MacDonald Hall, K1N 6N5 Ottawa, Canada
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Corrigendum to “Motion of a sphere parallel to plane walls in a Poiseuille flow. Application to field-flow fractionation and hydrodynamic chromatography” [Chem. Eng. Sci. 66 (2011) 4078–4089]. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2012.12.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
12
|
Blawzdziewicz J, Wajnryb E. The swapping-trajectory effect: lattice evolution and buckling transition in wall-bounded hydrodynamic crystals. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1742-6596/392/1/012008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
13
|
Feuillebois F, Ghalya N, Sellier A, Elasmi L. Influence of wall slip in dilute suspensions. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1742-6596/392/1/012012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
14
|
Impact of carrier fluid composition on recovery of nanoparticles and proteins in flow field flow fractionation. J Chromatogr A 2012; 1264:72-9. [PMID: 23058938 DOI: 10.1016/j.chroma.2012.09.050] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/14/2012] [Accepted: 09/17/2012] [Indexed: 11/20/2022]
Abstract
Flow field flow fractionation (F4) is an invaluable separation tool for large analytes, including nanoparticles and biomolecule complexes. However, sample loss due to analyte-channel membrane interaction limits extensive usage of F4 at present, which could be strongly affected by the carrier fluid composition. This work studied the impacts of carrier fluid (CF) composition on nanoparticle (NP) recovery in F4, with focus on high ionic strength conditions. Successful analysis of NPs in a biomolecules-friendly environment could expand the applicability of F4 to the developing field of nanobiotechnology. Recovery of the unfunctionalized polystyrene NPs of 199, 102, and 45 nm in CFs with various pH (6.2, 7.4 and 8.2), increasing ionic strength (0-0.1M), and different types of co- and counter-ions, were investigated. Additionally, elution of the 85 nm carboxylate NPs and two proteins, human serum albumin (HSA) and immunoglobulin (IgG), at high ionic strengths (0-0.15M) was investigated. Our results suggested that (1) electrostatic repulsion between the negatively charged NPs and the regenerated cellulose membrane was the main force to avoid particle adsorption on the membrane; (2) larger particles experienced higher attractive force and thus were influenced more by variation in CF composition; and (3) buffers containing weak anions or NPs with weak anion as the surface functional groups provided higher tolerance to the increase in ionic strength, owing to more anions being trapped inside the NP porous structure. Protein adsorption onto the membrane was also briefly investigated in salted CFs, using HSA and IgG. We believe our findings could help to identify the basic carrier fluid composition for higher sample recovery in F4 analysis of nanoparticles in a protein-friendly environment, which will be useful for applying F4 in bioassays and in nanotoxicology studies.
Collapse
|
15
|
Can slip walls improve field-flow fractionation or hydrodynamic chromatography? J Chromatogr A 2012; 1256:206-12. [DOI: 10.1016/j.chroma.2012.07.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Revised: 07/09/2012] [Accepted: 07/09/2012] [Indexed: 12/30/2022]
|
16
|
Martin M, Beckett R. Size Selectivity in Field-Flow Fractionation: Lift Mode of Retention with Near-Wall Lift Force. J Phys Chem A 2012; 116:6540-51. [DOI: 10.1021/jp212414e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michel Martin
- Ecole Supérieure de Physique et de Chimie Industrielles, Laboratoire de Physique et Mécanique des Milieux Hétérogènes (PMMH - UMR 7636 CNRS - ESPCI-ParisTech - Université Pierre et Marie Curie 6 - Université Paris Diderot), 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Ronald Beckett
- Water Studies Centre, School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| |
Collapse
|