Examination of Ellipsoidal Polystyrene Particles by Electrophoresis

Ho, CC; Ottewill, R. H.; Yu, Liying

doi:10.1021/la960954w

Cited by 40 publications

(39 citation statements)

References 25 publications

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“…A novel or improved technique [453][454][455] inheriting abilities of microfluidics but overcoming its problems such as tedious device preparation and scalability would be another renaissance for particle production. Finally, unique mechanical, packing and assembly properties of nonspherical particles are already drawing attention [6,85,161,[453][454][456][457][458][459][460][461][462][463][464][465][466][467][468] but the effect of porosity on such regular nonspherical particles is still waiting to be further exploited.…”

Section: Discussionmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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Section: Discussionmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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“…O'Brien and Ward [28] derived an analytical expression for the electrophoretic translation of spheroidal particles as the zeta potential increases. Ho et al [29] used this model to determine the zeta potential of ellipsoidal polystyrene particles with aspect ratios (diameter/length), between 1.0 and 4.5. Their observations deviated less than 10% from values obtained using Eq.…”

Section: Introductionmentioning

confidence: 99%

Rotational electrophoresis of striped metallic microrods

et al. 2007

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Analytical models are developed for the translation and rotation of metallic rods in a uniform electric field. The limits of thin and thick electric double layers are considered. These models include the effect of stripes of different metals along the length of the particle. Modeling results are compared to experimental measurements for metallic rods. Experiments demonstrate the increased alignment of particles with increasing field strength and the increase in degree of alignment of thin versus thick electric double layers. The metal rods polarize in the applied field and align parallel to its direction due to torques on the polarized charge. The torque due to polarization has a second order dependence on the electric field strength. The particles are also shown to have an additional alignment torque component due to non-uniform densities along their length. The orientation distributions of dilute suspensions of particles are also shown to agree well with results predicted by a rotational convective-diffusion equation.

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“…Heteromorphic microparticles compose a unique crystal structure for their optical properties to be investigated as new photonic crystals [19][20][21][22]. Some of them show electrophoresis [23]. The type of such functions and the magnitude of the response depend on the shape of the heteromorphic particle and its material distribution.…”

Section: Introductionmentioning

confidence: 99%

External Field Response and Applications of Metal Coated Hemispherical Janus Particles

2018

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Hemispherical Janus particles that were coated with silver or nickel on the equatorial plane of hemispherical polymer microparticles were prepared and dispersed in water and the responses to AC electric and stationary magnetic fields applied were investigated. Both of the particles are so oriented that the equatorial plane is parallel to the AC electric field, owing to electric-field induced dipole orientation, which is the response proportional to the quadratic electric field. The nickel coated particles are self-assembled to make a chain-like structure aligned in the direction of the stationary magnetic field. In addition, when both AC electric and stationary magnetic fields are applied, the orientation of a nickel-coated hemispherical particle is uniquely determined in such a way that the equatorial plane is parallel to both electric and magnetic fields. Because the particle is magnetized on the plane, its direction is reversed when the magnetic field is reversed, which is the response that is proportional to the magnetic field. Utilizing these features, mirrors are fabricated that can switch the transmittance and reflectance with electric and magnetic fields. Such features of the Janus particles as to be controlled by an electric and magnetic fields will find wide applications in the fields of microoptics and microfluidics.

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Examination of Ellipsoidal Polystyrene Particles by Electrophoresis

Cited by 40 publications

References 25 publications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Rotational electrophoresis of striped metallic microrods

External Field Response and Applications of Metal Coated Hemispherical Janus Particles

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