0912 Velocity measurement of particle movement in a minichannel by dielectrophoresis

Oshii, Kazuki; Choi, Je-Eun; Obara, Hiromichi; Takei, Masahiro

doi:10.1299/jsmefed.2010.257

Cited by 1 publication

(1 citation statement)

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“…〈FDEP〉 exerted on microparticles is in the nN range when Erms = 1000 -5000 V m -1 . 58 A particle moves in the direction increasing electric field density (positive DEP) when Re[fCM(ω)] > 0, while it moves in the opposite direction when Re[fCM(ω)] < 0 (negative DEP). Figure 3 shows the relationship between the frequency of an electric field and Re[fCM(ω)], which was calculated for εp* < εm*.…”

Section: •2 Dielectrophoresismentioning

confidence: 99%

Particle Manipulation with External Field; From Recent Advancement to Perspectives

Miyagawa

Okada

2020

ANAL. SCI.

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Physical forces, such as dielectric, magnetic, electric, optical, and acoustic force, provide useful principles for the manipulation of particles, which are impossible or difficult with other approaches. Microparticles, including polymer particles, liquid droplets, and biological cells, can be trapped at a particular position and are also transported to arbitrary locations in an appropriate external physical field. Since the force can be externally controlled by the field strength, we can evaluate physicochemical properties of particles from the shift of the particle location. Most of the manipulation studies are conducted for particles of sub-micrometer or larger dimensions, because the force exerted on nanomaterials or molecules is so weak that their direct manipulation is generally difficult. However, the behavior, interactions, and reactions of such small substances can be indirectly evaluated by observing microparticles, on which the targets are tethered, in a physical field. We review the recent advancements in the manipulation of particles using a physical force and discuss its potentials, advantages, and limitations from fundamental and practical perspectives.

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Section: •2 Dielectrophoresismentioning

confidence: 99%