Plastic micropump with ferrofluidic actuation

Yamahata, Christophe; Chastellain, M.; Parashar, V.K.; Petri, A.; Hofmann, Heinrich; Gijs, Martin A. M.

doi:10.1109/jmems.2004.839007

Cited by 127 publications

(85 citation statements)

References 19 publications

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“…A ferrofluidic plug in a y-shaped channel with two passive check valves was demonstrated as a micropumping option (Yamahata et al 2005a). The ferrofluid is water-based and separated from the working fluid with an oil plug.…”

Section: Ferrofluidmentioning

confidence: 99%

Recent advances in microscale pumping technologies: a review and evaluation

Iverson

Garimella

2008

Microfluid Nanofluid

421

249

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Micropumping has emerged as a critical research area for many electronics and biological applications. A significant driving force underlying this research has been the integration of pumping mechanisms in micro Total Analysis Systems (μTAS) and other multi-functional analysis techniques. Uses in electronics packaging and micromixing and microdosing systems have also capitalized on novel pumping concepts. The present work builds upon a number of existing reviews of micropumping strategies by focusing on the large body of micropump advances reported in the very recent literature. Critical selection criteria are included for pumps and valves to aid in determining the pumping mechanism that is most appropriate for a given application. Important limitations or incompatibilities are also addressed. Quantitative comparisons are provided in graphical and tabular forms.

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Section: Ferrofluidmentioning

confidence: 99%

Recent advances in microscale pumping technologies: a review and evaluation

Iverson

Garimella

2008

Microfluid Nanofluid

421

249

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“…[1][2][3][4][5][6][7][8][9][10] Most approaches in this context utilize magnetic forces acting on the surface of a layer or plug of ferrofluid to pump a secondary, immiscible, non-magnetic liquid. [1][2][3][4][6][7][8] Such schemes rely on surface tension forces to keep the ferrofluid layer intact, and work only within micron or millimeter-scale flow channels. 3,7,8 Correspondingly, typical volumetric flow rates achieved so far are small (i.e., microliters/minute) and potential applications are limited to lab-on-a-chip devices.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][6][7][8] Such schemes rely on surface tension forces to keep the ferrofluid layer intact, and work only within micron or millimeter-scale flow channels. 3,7,8 Correspondingly, typical volumetric flow rates achieved so far are small (i.e., microliters/minute) and potential applications are limited to lab-on-a-chip devices. [1][2][3][6][7][8] Moreover, magnetic nanoparticles from the ferrofluid inevitably diffuse into the secondary liquid, 3 resulting in rapid performance deterioration and a short shelf life for such devices.…”

Section: Introductionmentioning

confidence: 99%

“…3,7,8 Correspondingly, typical volumetric flow rates achieved so far are small (i.e., microliters/minute) and potential applications are limited to lab-on-a-chip devices. [1][2][3][6][7][8] Moreover, magnetic nanoparticles from the ferrofluid inevitably diffuse into the secondary liquid, 3 resulting in rapid performance deterioration and a short shelf life for such devices. Furthermore, high field magnitudes and gradients are needed to drag a ferrofluid plug through a secondary liquid with minimal slip.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct observation of closed-loop ferrohydrodynamic pumping under traveling magnetic fields

Mao

Elborai

et al. 2011

Phys. Rev. B

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Ferrofluid-based liquid manipulation schemes typically actuate an immiscible liquid via a ferrofluid plug, using high (~1 T) magnetic flux densities and strong field gradients created with bulky permanent magnets. They rely on surface tension effects to maintain the cohesion of the ferrofluid plug, necessitating miniature channels and slow (~1 microliter/minute) flow speeds. Here, we demonstrate direct ferrohydrodynamic pumping using traveling magnetic fields at controllable speeds in a simple, closed-loop geometry without any mechanically actuated components. The pumping approach is compact, scalable and practical. Using moderate field amplitudes (~10 mT), we obtained a maximum volumetric flow rate of 0.69 ml/s using a readily available commercial ferrofluid. Our closed-loop pumping approach could lead to integrated and efficient liquid manipulation and cooling schemes based on ferrofluids.3

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“…Such control has been demonstrated utilizing mechanical, electrical, thermal and optical force methods. [3][4][5][6][7][8][9][10] Electrical methods require the integration of electrodes to the microfluidic chip. If an electric field is applied between two electrodes on the same plane, a nonuniform electric field distribution is formed within the channel and the directionality and adaptability of the field is limited.…”

Section: Introductionmentioning

confidence: 99%

3-dimensional electrode patterning within a microfluidic channel using metal ion implantation

et al. 2010

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The application of electrical fields within a microfluidic channel enables many forms of manipulation necessary for lab-on-a-chip devices. Patterning electrodes inside the microfluidic channel generally requires multi-step optical lithography. Here, we utilize an ion-implantation process to pattern 3D electrodes within a fluidic channel made of polydimethylsiloxane (PDMS). Electrode structuring within the channel is achieved by ion implantation at a 40 angle with a metal shadow mask. The advantages of three-dimensional structuring of electrodes within a fluidic channel over traditional planar electrode designs are discussed. Two possible applications are presented: asymmetric particles can be aligned in any of the three axial dimensions with electro-orientation; colloidal focusing and concentration within a fluidic channel can be achieved through dielectrophoresis. Demonstrations are shown with E. coli, a rod shaped bacteria, and indicate the potential that ion-implanted microfluidic channels have for manipulations in the context of lab-on-a-chip devices.

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Plastic micropump with ferrofluidic actuation

Cited by 127 publications

References 19 publications

Recent advances in microscale pumping technologies: a review and evaluation

Recent advances in microscale pumping technologies: a review and evaluation

Direct observation of closed-loop ferrohydrodynamic pumping under traveling magnetic fields

3-dimensional electrode patterning within a microfluidic channel using metal ion implantation

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