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Arnaud Bertsch

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Related publications (94)

SU-8 nanocomposite photoresist with low stress properties for microfabrication applications

Heinrich Hofmann, Philippe Renaud, Arnaud Bertsch, Sébastien Jiguet

2006

Effect of filler behavior on nanocomposite SU8 photoresist for moving micro- parts

Stefano Mischler, Philippe Renaud, Arnaud Bertsch, Sébastien Jiguet

The use of low-stress SU8 nanocomposites as a functional material for micro- parts and coating applications is described in this paper. It was found that the nanoparticles lower the internal stress and decrease the wear rate and frictional coefficient of t ...

2006

SU-8 nanocomposite coatings with improved tribological performance for MEMS

Heinrich Hofmann, Stefano Mischler, Philippe Renaud, Arnaud Bertsch, Sébastien Jiguet

The increasing interests in micro-electro-mechanical systems (MEMS) has raised the requirement for photoresist materials with improved friction and wear properties for mechanically loaded 3D shaped microstructures. In this work, SU8 photoresist layers rein ...

2006

pH Controlled Diffusion of Proteins with Different pI Values across a Nanochannel on a Chip

Philippe Renaud, Arnaud Bertsch, Reto Bruno Schoch

Electrostatic interactions dominate the diffusion of proteins in a nanochannel, which was measured and modeled for pH values above and below the isoelectric points of three lectin proteins. Maximal diffusion coefficients were obtained when the proteins wer ...

American Chemical Society (ACS)2006

Partial release and detachment of microfabricated metal and polymer structures by anodic metal dissolution

Philippe Renaud, Arnaud Bertsch, Stefan Metz

The large majority of microelectromechanical systems (MEMS) are fabricated on silicon, glass or Pyrex substrates by manufacturing techniques, which originated from the semiconductors industry. However, their final application often requires removal of the ...

Institute of Electrical and Electronics Engineers2005

Conductive SU8 Photoresist for Microfabrication

Heinrich Hofmann, Philippe Renaud, Arnaud Bertsch, Sébastien Jiguet

A conductive composite photoresist has been developed for the direct photopatterning of electrodes. It is based on a dispersion of silver nanoparticles in SU8, a non-conductive, negative-tone photoresist. Manufactured structures have an electrical conducti ...

2005

Cell immersion and cell dipping in microfluidic devices

Shady Didier Gawad, Philippe Renaud, Arnaud Bertsch, Urban Seger

Combining deflective dielectrophoretic barriers with controlled pressure driven liquid flows in microfluidic devices allows accurate handling of particles such as biological cells in suspensions. Working towards cell-based lab-on-a-chip applications, a pla ...

2004

SU8-silver photosensitive nanocomposite

Heinrich Hofmann, Philippe Renaud, Arnaud Bertsch, Sébastien Jiguet

2004

Flexible polyimide probes with microelectrodes and embedded microfluidic channels for simultaneous drug delivery and multi-channel monitoring of bioelectric activity

Philippe Renaud, Arnaud Bertsch, Stefan Metz

The study of intracellular communication requires devices that can not only monitor the bioelectric activity, but also control and observe the biochemical environment at the cellular level. This paper reports on the development and characterisation of impl ...

Elsevier2004

First steps toward noninvasive intraocular pressure monitoring with a sensing contact lens

Matteo Leonardi, Philippe Renaud, Arnaud Bertsch

PURPOSE. To present a novel and minimally invasive approach to intraocular pressure (IOP) monitoring based on a sensing contact lens. METHODS. The key element of this measurement method is a soft contact lens with an embedded microfabricated strain gauge a ...

2004

Polyimide microfluidic devices with integrated nanoporous filtration areas manufactured by micromachining and ion track technology

Philippe Renaud, Arnaud Bertsch, Stefan Metz

This paper reports on polyimide microfluidic devices fabricated by photolithography and a layer transfer lamination technology. The microchannels are sealed by laminating an uncured polyimide film on a partially cured layer and subsequent imidization. Sele ...

2004

Polyimide and SU-8 microfluidic devices manufactured by heat- depolymerizable sacrificial material technique

Philippe Renaud, Arnaud Bertsch, Stefan Metz, Sébastien Jiguet

The following paper describes a sacrificial layer method for the manufacturing of microfluidic devices in polyimide and SU-8. The technique uses heat-depolymerizable polycarbonates embedded in polyimide or SU-8 for the generation of microchannels and seale ...

2004

Dielectric spectroscopy in a micromachined flow cytometer: theoretical and practical considerations

Shady Didier Gawad, Philippe Renaud, Arnaud Bertsch, Urban Seger, Karen Cheung

We propose a model to determine the influence of different cell properties, such as size, membrane capacitance and cytoplasm conductivity, on the impedance spectrum as measured in a microfabricated cytometer. A dielectric sphere of equivalent complex permi ...

2004

Flexible microchannels with integrated nanoporous membranes for filtration and separation of molecules and particles

Philippe Renaud, Arnaud Bertsch, Stefan Metz

This paper reports on the technology development and characterization of polyimide-based, microfluidic channels with integrated nanoporous membranes. A layer transfer and lamination technique is used to fabricate flexible microchannels from spin-on polyimi ...

2002

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