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Dose-response curve of a microfluidic magnetic bead-based surface coverage sandwich assay

Publications associées (34)

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Attomolar protein detection using a magnetic bead surface coverage assay

Martinus Gijs, Matteo Cornaglia, Hüseyin Cumhur Tekin

We demonstrate a microfluidic method for ultra-sensitive protein detection in serum. First, ‘large’ (2.8 μm) antibody-functionalized magnetic beads specifically capture antigen from a serum matrix under active microfluidic mixing. Subsequently, the large b ...

Royal Society of Chemistry2013

Automated Analysis of Rare Biomarkers Using a Magnetic Bead Surface Coverage Assay Coupled with Chaotic Mixing on a Microfluidic Chip

Hüseyin Cumhur Tekin

Extremely sensitive protein detection is crucial for early diagnosis and monitoring of diseases. Present day’s limit of detection for an antibody-antigen recognition-based immunoassay in serum without having to use special target antigen amplification tech ...

EPFL2012

Optofluidic differential spectroscopy for absorbance detection of sub-nanolitre liquid samples

Wuzhou Song, Jianhang Yang

We present a novel optofluidic differential method for carrying out absorbance spectroscopy of subnanolitre volumes of liquid samples on a microfluidic chip. Due to the reduction of liquid volume, the absorbance detection in microfluidics is often hindered ...

Royal Society of Chemistry2012

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We present the rapid fabrication of custom protein micro-arrays, in less than 35 minutes, on the surface of immobilized beads using microchannel-guided flows driven by a single syringe pump. The commercially available beads provide robust micro-array surfa ...

2011

Magnetic particle dosing and size separation in a microfluidic channel

Martinus Gijs, Thomas Lehnert, Yves Moser, Rana Afshar Ghasemlouy

Separation of functional magnetic particles or magnetically labeled entities is a key feature for bioanalytical or biomedical applications and therefore also an important component of lab-on-a-chip devices for biological applications. We present a novel in ...

2011

Magnetic particle dosing and size separation in a microfluidic channel

Martinus Gijs, Thomas Lehnert, Yves Moser, Rana Afshar Ghasemlouy

2011

Simultaneous washing and concentration of functionalized magnetic beads in a complex sample solution was demonstrated by applying a rotational magnetic actuation system to a microfluidic chip under continuous flow conditions. The rotation of periodically a ...

2011

Functional magnetic micro- and nanoparticles are used in bioanalytical applications as solid carriers for capture, transport and detection of biomolecules or magnetically labeled cells. Colloidal suspensions of such particles provide a large specific surfa ...

EPFL2011

Study of Spatio-Temporal Immunofluorescence on Bead Patterns in a Microfluidic Channel

Martinus Gijs, Venkataragavalu Sivagnanam, Hui Yang

We performed a direct immunoassay inside a microfluidic channel on patterned streptavidin-coated beads, which captured fluorescently-labeled biotin target molecules from a continuous flow. We arranged the beads in a dot array at the bottom of the channel a ...

American Institute of Physics2010

Microfluidic assays for DNA manipulation based on a block copolymer immobilization strategy

Demetri Psaltis, Andreas Vasdekis

Methods to manipulate and visualize isolated DNA and oligonucleotide strands are important for investigation of their biophysics as well as their interactions with proteins. Herein, we report such a method by combining a block copolymer surface functionali ...

2010