AC-dielectrophoretic characterization and separation of submicron and micron particles using sidewall AgPDMS electrodes

Lewpiriyawong, Nuttawut; Yang, Chun

doi:10.1063/1.3682049

Cited by 38 publications

(19 citation statements)

References 32 publications

(21 reference statements)

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“…A general electrodes shape is illustrated in Fig. D using simulated parameters such that

ζ_{| |} \approx 0.0015 Ns \cdot m^{- 2}

Ω \approx 942 rad \cdot s^{- 1}

L \approx 13 μ normalm

; ε medium has typical order of 10 −9

F \cdot m^{- 1}

and Re( f CM ) takes the value of 0.5 .…”

Section: Resultsmentioning

confidence: 99%

Effect of dielectrophoretic force on swimming bacteria

Tran

Marcos

2015

Electrophoresis

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Dielectrophoresis (DEP) has been applied widely in bacterial manipulation such as separating, concentrating, and focusing. Previous studies primarily focused on the collective effects of DEP force on the bacterial population. However, the influence of DEP force on the swimming of a single bacterium had not been investigated. In this study, we present a model to analyze the effect of DEP force on a swimming helically flagellated bacterium, particularly on its swimming direction and velocity. We consider a simple DEP force that acts along the X-direction, and its strength as well as direction varies with the X- and Y-positions. Resistive force theory is employed to compute the hydrodynamic force on the bacterium's flagellar bundle, and the effects of both DEP force and rotational diffusion on the swimming of the bacterium are simultaneously taken into consideration using the Fokker-Planck equation. We show the mechanism of how DEP force alters the orientation and velocity of the bacterium. In most cases, the DEP force dominantly influences the orientation of the swimming bacterium; however, when the DEP force strongly varies along the Y-direction, the rotational diffusion is also responsible for determining the bacterium's reorientation. More interestingly, the variance of DEP force along the Y-direction causes the bacterium to experience a translational velocity perpendicular to its primary axis, and this phenomenon could be utilized to focus the bacteria. Finally, we show the feasibility of applying our findings to achieve bacterial focusing.

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“…A general electrodes shape is illustrated in Fig. D using simulated parameters such that

ζ_{| |} \approx 0.0015 Ns \cdot m^{- 2}

Ω \approx 942 rad \cdot s^{- 1}

L \approx 13 μ normalm

; ε medium has typical order of 10 −9

F \cdot m^{- 1}

and Re( f CM ) takes the value of 0.5 .…”

Section: Resultsmentioning

confidence: 99%

Effect of dielectrophoretic force on swimming bacteria

Tran

Marcos

2015

Electrophoresis

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“…However, it is increasingly common for lap-on-a-chip devices to deal with submicron particles (Abgrall and Nguyen 2008;Lewpiriyawong and Yang 2012) and cells (Lewpiriyawong et al 2011). In such length scale, models need to incorporate active Brownian motion in order to accurately account for their motion (Kim et al 2008;Volpe et al 2014).…”

Section: Brownian Motionmentioning

confidence: 99%

Theoretical modeling in microscale locomotion

Koh

Shen

Marcos

2016

Microfluid Nanofluid

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“…To address this issue, several three-dimensional (3D) electrodes designs have been reported, such as double planar electrodes [4], heavy doped silicon [5], pyrolyzed SU-8 [6], electroplated gold [7], and AgPDMS [8]. However, these methods are difficult to integrate with IC industry.…”

Section: Introductionmentioning

confidence: 99%

A complete design flow of dielectrophoretic chip

Pan

Zhou

2014

2014 12th IEEE International Conference on Solid-State and Integrated Circuit Technology (ICSICT)

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Traditional methods of dielectrophoretic (DEP) separation using planar microelectrodes and recent research about vertical electrodes cannot improve both effectiveness and integration for industry. This paper describes the design and numerical simulation of microdevice using COMSOL, which can separate particles by lateral electrical fields uniformly along the vertical direction in the channel. Particles tracing is fully coupled to electric field and fluidic field, which is a complete design flow of DEP devices. Particle separation is demonstrated for continuous separation in a flowing mixture of 1 µm and 10 µm particles with 100% separation efficiency.

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AC-dielectrophoretic characterization and separation of submicron and micron particles using sidewall AgPDMS electrodes

Cited by 38 publications

References 32 publications

Effect of dielectrophoretic force on swimming bacteria

Effect of dielectrophoretic force on swimming bacteria

Theoretical modeling in microscale locomotion

A complete design flow of dielectrophoretic chip

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