Fabrication of Three-Dimensional Magnetic Microdevices With Embedded Microcoils for Magnetic Potential Concentration

Ramadan, Qasem; Samper, Victor; Puiu, D.P.; Chen, Yu

doi:10.1109/jmems.2006.876788

Cited by 43 publications

(34 citation statements)

References 23 publications

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“…Can be shown (Ramadan et al 2006a) that the Eq. 1 is simplified for particles suspended in solution to:…”

Section: Analytical Considerationsmentioning

confidence: 99%

“…Theoretically a magnetic particle suspended in a perfectly uniform magnetic field of density experiences no net magnetic force (Ramadan et al 2006a), but the magnetic particle creates its own magnetic field which generates magnetic field gradient. The equation underlines the importance of generating a magnetic field gradient especially when the size of the particle is microor nano-meter range.…”

Section: Analytical Considerationsmentioning

confidence: 99%

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Microfluidic device for continuous magnetophoretic separation of white blood cells

et al. 2008

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This paper presents a microfluidic device for magnetophoretic separation of red blood cells from blood under continuous flow. The separation method consists of continuous flow of a blood sample (diluted in PBS) through a microfluidic channel which presents on the bottom ''dots'' of ferromagnetic layer. By applying a magnetic field perpendicular on the flowing direction, the ferromagnetic ''dots'' generate a gradient of magnetic field which amplifies the magnetic force. As a result, the red blood cells are captured on the bottom of the microfluidic channel while the rest of the blood is collected at the outlet. Experimental results show that an average of 95% of red blood cells is trapped in the device.

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“…Can be shown (Ramadan et al 2006a) that the Eq. 1 is simplified for particles suspended in solution to:…”

Section: Analytical Considerationsmentioning

confidence: 99%

Section: Analytical Considerationsmentioning

confidence: 99%

Microfluidic device for continuous magnetophoretic separation of white blood cells

et al. 2008

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“…Photolithographic techniques enable fabrication of almost any desired MET geometry; as a result the geometry of an MET can be tuned for a specific application. Ramadan et al [18,[21][22][23][24][25][26][27] and Lee et al [20,28] have demonstrated customized MP traps which emphasize the effects of different MET geometries. Simulations of magnetic fields produced by different MET geometries have magnetic field profiles attributed to the shape of the MET and magnetic coupling between conductors or loops.…”

Section: Geometrymentioning

confidence: 99%

Applications of microelectromagnetic traps

Basore

Baker

2012

Anal Bioanal Chem

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Microelectromagnetic traps (METs) have been used for almost two decades to manipulate magnetic fields. Different trap geometries have been shown to produce distinct magnetic fields and field gradients. Initially, microelectromagnetic traps were used mainly to separate and concentrate magnetic material at small scales. Recently such traps have been implemented for unique applications, for example filterless bioseparations, inductive heat generation, and biological detection. In this review, we describe recent reports in which MET geometry, current density, or external fields have been used. Descriptions of recent applications in which METs have been used to develop sensors, manipulate DNA, or block ion current are also provided.

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“…Inset is a SEM image of the l-EMT before the deposition of the insulating layer reflect the experimental conditions, a current density of 24 9 10 8 A/m 2 , that is a current intensity of 240 mA is set for the source term j u in the subdomain C 1 C 2 C 3 C 4 corresponding to the electric coil. Since electroplated Ni is a relatively soft ferromagnetic material and the magnetic field generated by the electric coil is relatively weak, we consider the material in the magnetic post P as linear with a relative magnetic permeability l r = 1,000 (Ramadan et al 2006b). The inherent problems associated with the evaluation of the spatial derivatives of the magnetic field on linear triangles can be avoided by using higher order elements in the finite element scheme for Eq.…”

Section: Numerical Simulationmentioning

confidence: 99%

The influence of magnetic carrier size on the performance of microfluidic integrated micro-electromagnetic traps

Drogoff¹,

Clime²,

Veres³

2008

Microfluid Nanofluid

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Fabrication of Three-Dimensional Magnetic Microdevices With Embedded Microcoils for Magnetic Potential Concentration

Cited by 43 publications

References 23 publications

Microfluidic device for continuous magnetophoretic separation of white blood cells

Microfluidic device for continuous magnetophoretic separation of white blood cells

Applications of microelectromagnetic traps

The influence of magnetic carrier size on the performance of microfluidic integrated micro-electromagnetic traps

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