Polarization and interactions of colloidal particles in ac electric fields

The Journal of Chemical Physics
Manish MittalEric M Furst

Abstract

Micrometer-sized polystyrene particles form two-dimensional crystals in alternating current (ac) electric fields. The induced dipole-dipole interaction is the dominant force that drives this assembly. We report measurements of forces between colloidal particles in ac electric fields using optical tweezers and find good agreement with the point dipole model. The magnitude of the pair interaction forces depends strongly on the bulk solution conductivity and decreases as the ionic strength increases. The forces also decrease with increasing field frequency. The salt and frequency dependences are consistent with double layer polarization with a characteristic relaxation frequency omega(CD) approximately a(2)/D, where a is the particle radius and D is the ion diffusivity. This enables us to reinterpret the order-disorder transition reported for micrometer-sized polystyrene particles [Lumsdon et al., Langmuir 20, 2108 (2004)], including the dependence on particle size, frequency, and ionic strength. These results provide a rational framework for identifying assembly conditions of colloidal particles in ac fields over a wide range of parameters.

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Citations

Sep 8, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Kelsey A CollinsStephanie S Lee
May 19, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Jingjing Gong, Ning Wu
May 16, 2018·Soft Matter·Joseph M Carmack, Paul C Millett
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Nov 21, 2018·Soft Matter·Kirill A KomarovStanislav O Yurchenko
Jun 13, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·John P SinghEric M Furst
Sep 12, 2020·Soft Matter·Lian Dan YaoTian Hui Zhang
Aug 2, 2017·Soft Matter·Zhuoqiang JiaStephanie S Lee
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Oct 16, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Robert F Stout, Aditya S Khair
Jan 3, 2020·The Journal of Chemical Physics·Kirill A KomarovStanislav O Yurchenko
Sep 27, 2018·Physical Review. E·Alexandra ZampetakiPeter Schmelcher
Aug 21, 2013·Journal of Colloid and Interface Science·Peter J BeltramoEric M Furst
Apr 3, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Carlos L Pérez, Jonathan D Posner
Jul 4, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Pushkar P Lele, Eric M Furst
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Oct 28, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Pushkar P LeleEric M Furst
Jun 24, 2010·ACS Nano·Marek GrzelczakLuis M Liz-Marzán
Jul 12, 2011·ACS Nano·Jason D ForsterEric R Dufresne
Jun 26, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Peter J Beltramo, Eric M Furst
Jan 2, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Ching-Wen Chiu, William A Ducker
Feb 9, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Jason M McMullan, Norman J Wagner
Mar 19, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Meenal GoelShalini Gupta
Dec 12, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Mark M PanczykEric M Furst
May 22, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Zachary M ShermanJames W Swan
Aug 30, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Pengcheng SongMichael D Ward
Feb 19, 2015·Journal of the American Chemical Society·Pengcheng SongMichael D Ward
Oct 1, 2021·Proceedings of the National Academy of Sciences of the United States of America·Zeng Tao LiuTian Hui Zhang

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Methods Mentioned

BETA
force measurements
force measurement
optical tweezers

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