Hydrodynamic flow induced anisotropy in colloid adsorption

Research output: Contribution to journalArticleAcademic

12 Citations (Scopus)

Abstract

The possibility to induce structure in layers of colloid particles by using the hydrodynamic blocking effect is investigated both experimentally and by using Monte Carlo simulations. Latex particles with diameters of 1.1 m and 0.46 m are deposited on 3-amino-propyltriethoxysilane (APTES) functionalized substrates under shear flow conditions. The spatial particle distribution in the adsorbed layers is analyzed using a two-dimensional map of the pair correlation function obtained from image analysis of optical micrographs. This pair correlation map (PCM) enables visualization of the exclusion zone and allows determination of its length as a function of the Peclet number. We find that this shadow length scales with the Peclet number with an exponent less than one due to attractive particle–surface interactions. Results obtained by Monte Carlo simulations using a random sequential adsorption (RSA) model are analyzed using the same PCM and show qualitative agreement with the experiments. The reduced particle density behind particles in the flow direction promises the possibility to selectively deposit particles in these locations after reducing the hydrodynamic screening of the surface. Simulations show that it is indeed possible to self-assemble particle pairs by performing consecutive depositions under different flow conditions on the same surface.
Original languageUndefined
Pages (from-to)46-52
JournalColloids and surfaces A: Physicochemical and engineering aspects
Volume342
Issue number1-3
DOIs
Publication statusPublished - 2009

Keywords

  • IR-75152

Cite this

@article{74e9c63cf1a340eb96468d8c60deded0,
title = "Hydrodynamic flow induced anisotropy in colloid adsorption",
abstract = "The possibility to induce structure in layers of colloid particles by using the hydrodynamic blocking effect is investigated both experimentally and by using Monte Carlo simulations. Latex particles with diameters of 1.1 m and 0.46 m are deposited on 3-amino-propyltriethoxysilane (APTES) functionalized substrates under shear flow conditions. The spatial particle distribution in the adsorbed layers is analyzed using a two-dimensional map of the pair correlation function obtained from image analysis of optical micrographs. This pair correlation map (PCM) enables visualization of the exclusion zone and allows determination of its length as a function of the Peclet number. We find that this shadow length scales with the Peclet number with an exponent less than one due to attractive particle–surface interactions. Results obtained by Monte Carlo simulations using a random sequential adsorption (RSA) model are analyzed using the same PCM and show qualitative agreement with the experiments. The reduced particle density behind particles in the flow direction promises the possibility to selectively deposit particles in these locations after reducing the hydrodynamic screening of the surface. Simulations show that it is indeed possible to self-assemble particle pairs by performing consecutive depositions under different flow conditions on the same surface.",
keywords = "IR-75152",
author = "Loenhout, {Marijn T.J.} and Kooij, {Ernst S.} and Herbert Wormeester and Bene Poelsema",
year = "2009",
doi = "10.1016/j.colsurfa.2009.03.058",
language = "Undefined",
volume = "342",
pages = "46--52",
journal = "Colloids and surfaces A: Physicochemical and engineering aspects",
issn = "0927-7757",
publisher = "Elsevier",
number = "1-3",

}

Hydrodynamic flow induced anisotropy in colloid adsorption. / Loenhout, Marijn T.J.; Kooij, Ernst S.; Wormeester, Herbert; Poelsema, Bene.

In: Colloids and surfaces A: Physicochemical and engineering aspects, Vol. 342, No. 1-3, 2009, p. 46-52.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Hydrodynamic flow induced anisotropy in colloid adsorption

AU - Loenhout, Marijn T.J.

AU - Kooij, Ernst S.

AU - Wormeester, Herbert

AU - Poelsema, Bene

PY - 2009

Y1 - 2009

N2 - The possibility to induce structure in layers of colloid particles by using the hydrodynamic blocking effect is investigated both experimentally and by using Monte Carlo simulations. Latex particles with diameters of 1.1 m and 0.46 m are deposited on 3-amino-propyltriethoxysilane (APTES) functionalized substrates under shear flow conditions. The spatial particle distribution in the adsorbed layers is analyzed using a two-dimensional map of the pair correlation function obtained from image analysis of optical micrographs. This pair correlation map (PCM) enables visualization of the exclusion zone and allows determination of its length as a function of the Peclet number. We find that this shadow length scales with the Peclet number with an exponent less than one due to attractive particle–surface interactions. Results obtained by Monte Carlo simulations using a random sequential adsorption (RSA) model are analyzed using the same PCM and show qualitative agreement with the experiments. The reduced particle density behind particles in the flow direction promises the possibility to selectively deposit particles in these locations after reducing the hydrodynamic screening of the surface. Simulations show that it is indeed possible to self-assemble particle pairs by performing consecutive depositions under different flow conditions on the same surface.

AB - The possibility to induce structure in layers of colloid particles by using the hydrodynamic blocking effect is investigated both experimentally and by using Monte Carlo simulations. Latex particles with diameters of 1.1 m and 0.46 m are deposited on 3-amino-propyltriethoxysilane (APTES) functionalized substrates under shear flow conditions. The spatial particle distribution in the adsorbed layers is analyzed using a two-dimensional map of the pair correlation function obtained from image analysis of optical micrographs. This pair correlation map (PCM) enables visualization of the exclusion zone and allows determination of its length as a function of the Peclet number. We find that this shadow length scales with the Peclet number with an exponent less than one due to attractive particle–surface interactions. Results obtained by Monte Carlo simulations using a random sequential adsorption (RSA) model are analyzed using the same PCM and show qualitative agreement with the experiments. The reduced particle density behind particles in the flow direction promises the possibility to selectively deposit particles in these locations after reducing the hydrodynamic screening of the surface. Simulations show that it is indeed possible to self-assemble particle pairs by performing consecutive depositions under different flow conditions on the same surface.

KW - IR-75152

U2 - 10.1016/j.colsurfa.2009.03.058

DO - 10.1016/j.colsurfa.2009.03.058

M3 - Article

VL - 342

SP - 46

EP - 52

JO - Colloids and surfaces A: Physicochemical and engineering aspects

JF - Colloids and surfaces A: Physicochemical and engineering aspects

SN - 0927-7757

IS - 1-3

ER -