Electromagnetic membrane-pump with an integrated magnetic yoke

Lederer, Thomas; Heinisch, Martin; Hilber, Wolfgang; Jakoby, Bernhard

doi:10.1109/icsens.2009.5398295

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Possible actuation approaches are diverse. Often oscillating membranes are utilized, which are actuated by piezo elements [1], magnets and electromagnetic coils [2][3][4], but also oscillating bubbles [5] are used for actuation. The diffusor/nozzle structures can be implemented via the channel geometry, but also open-porous foams with a gradient in pore size (which also adds a filtration function) are reported [6].…”

Section: Introductionmentioning

confidence: 99%

A Diffusor/Nozzle Pump Based on a Magnetically Actuated Flexible PCB Diaphragm

Hintermuller

Jakoby

2018

Eurosensors 2018

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We present a valveless microfluidic pump utilizing an oscillating membrane made from a flexible printed circuit board. The microfluidic channel is fabricated by a 3D printing process and features diffuser/nozzle structures to obtain a directed flow; the flexible membrane is bonded to the channel. The membrane is actuated via Lorentz forces to accomplish out-of-plane motions and push the fluid through the channel. A permanent magnet provides the static magnetic field required for the actuation. The simple fabrication method can potentially be used for inexpensive mass fabrication for disposable devices.

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Section: Introductionmentioning

confidence: 99%

A Diffusor/Nozzle Pump Based on a Magnetically Actuated Flexible PCB Diaphragm

Hintermuller

Jakoby

2018

Eurosensors 2018

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“…2 . Different actuation sequences and electrode designs can be used for EWOD manipulations, e.g., creation, transport, mixing, divisions and accurate handling of multiple small volume droplets [3–5] on a common electrode array. This offers the possibility of performing different (bio)-chemical reactions on the same chip by simply changing the sequence of droplet manipulations.…”

Section: Introductionmentioning

confidence: 99%

Utilizing a high fundamental frequency quartz crystal resonator as a biosensor in a digital microfluidic platform

Lederer

Stehrer

Bauer

et al. 2011

Sensors and Actuators A: Physical

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We demonstrate the operation of a digital microfluidic lab-on-a-chip system utilizing Electro Wetting on Dielectrics (EWOD) as the actuation principle and a High Fundamental Frequency (HFF; 50 MHz) quartz crystal microbalance (QCM) resonator as a mass-sensitive sensor. In a first experiment we have tested the reversible formation of a phosphor-lipid monolayer of phospholipid vesicles out of an aqueous buffer suspension onto a bio-functionalized integrated QCM sensor. A binding of bio-molecules results in an altered mass load of the resonant sensor and a shift of the resonance frequency can be measured. In the second part of the experiment, the formation of a protein multilayer composed of the biomolecule streptavidin and biotinylated immunoglobulin G was monitored. Additionally, the macroscopic contact angle was optically measured in order to verify the bio-specific binding and to test the implications onto the balance of the surface tensions. Using these sample applications, we were able to demonstrate and to verify the feasibility of integrating a mass-sensitive QCM sensor into a digital microfluidic chip.

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Electromagnetic membrane-pump with an integrated magnetic yoke

Cited by 2 publications

References 9 publications

A Diffusor/Nozzle Pump Based on a Magnetically Actuated Flexible PCB Diaphragm

A Diffusor/Nozzle Pump Based on a Magnetically Actuated Flexible PCB Diaphragm

Utilizing a high fundamental frequency quartz crystal resonator as a biosensor in a digital microfluidic platform

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