Concept

Magnetic tweezers

Publications associées (29)

Resonant optical trapping in microfluidic-integrated hollow photonic crystal cavities

The recent years have highlighted the potential of photonic nanostructures to extend the capabilities of optical tweezers and to perform advanced optical manipulations. In this context, two-dimensional photonic crystal cavities have been regarded as promis ...

EPFL2013

A microchip emitter for solid phase extraction – gradient elution – mass spectrometry

Hubert Girault, Liang Qiao, Natalia Gasilova, Dmitry Momotenko, Mohammad Reza Pourhaghighi

A microchip electrospray emitter with a magnetic bead trap has been designed for solid phase extraction-gradient elution-mass spectrometry (SPE-GEMS). The goal of this method is the detection of analytes at low concentrations and it is here demonstrated us ...

American Chemical Society2013

Vesicle Photonics

Demetri Psaltis, Jeffrey Alan Hubbell, Sylvie Roke, Andreas Vasdekis

Amphiphiles, under appropriate conditions, can self-assemble into nanoscale thin membrane vessels (vesicles) that encapsulate and hence protect and transportmolecular payloads.Vesicles assemble naturally within cells but can also be artificially synthesize ...

Annual Reviews2013

Hydrodynamic and subdiffusive motion of tracers in a viscoelastic medium

László Forró, Sylvia Jeney, Elena Bertseva

We investigate the diffusive motion of micron-sized spherical tracers in a viscoelastic actin filament network over the time span of 8 orders of magnitude using optical-tweezers single-particle tracking. The hydrodynamic interactions of a tracer with the s ...

Amer Physical Soc2013

Optical trapping microrheology in cultured human cells

László Forró, Sylvia Jeney, Elena Bertseva

We present the microrheological study of the two close human epithelial cell lines: non-cancerous HCV29 and cancerous T24. The optical tweezers tracking was applied to extract the several seconds long trajectories of endogenous lipid granules at time step ...

Springer-Verlag2012

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

Thermodynamics of continuous media with electromagnetic fields

Jean-Philippe Ansermet, Sylvain Bréchet, François Reuse

The thermodynamics of an electrically charged, multicomponent continuous medium with electromagnetic fields is analysed in the non-relativistic limit. Applying locally the first and second law of thermodynamics and Maxwell’s equations for a linear theory o ...

EDP Sciences, Springer2012

Bubble cell for magnetic bead trapping in capillary electrophoresis

Hubert Girault, Anne-Laure Gassner

A bubble cell capillary classically used to extend the optical path length for UV-vis detection is employed here to trap magnetic beads. With this system, a large amount of beads can be captured without inducing a strong pressure drop, as it is the case wi ...

Springer Verlag2011

Separation and Focusing of Magnetic Beads for Agglutination Tests

Rana Afshar Ghasemlouy

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