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Arnaud Bertsch

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Publications associées (94)

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Multimaterial Nanoporous Membranes Shaped through High Aspect-Ratio Sacrificial Silicon Nanostructures

Philippe Renaud, Arnaud Bertsch, Stefano Silvio Giovanni Varricchio, Niccolo Piacentini

We present an innovative fabrication method for solid-state nanoporous membranes based on the casting of sacrificial silicon nanostructures. The process allows the individual definition of geometry and placement of each nanopore through e-beam lithography ...

Amer Chemical Soc2017

On-chip synthesis of fine-tuned bone-seeking hybrid nanoparticles

Philippe Renaud, Arnaud Bertsch, Mohammad Mahdi Hasani-Sadrabadi

Aims: Here we report a one-step approach for reproducible synthesis of finely tuned targeting multifunctional hybrid nanoparticles (HNPs). Materials & methods: A microfluidic-assisted method was employed for controlled nanoprecipitation of bisphosphonate-c ...

Future Medicine Ltd2015

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

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

Fluorine based plasma treatment of biocompatible silicone elastomer. Effect of temperature on etch rate and surface properties

Arnaud Bertsch, Cyrille Hibert

This paper describes F-based dry etching and resulting surface properties of biocompatible silicone elastomer. The etch rate of polysiloxane and surface morphology was found to be highly temperature dependent. An increase in temperature results in a signif ...

2008

Additive manufacturing of water-soluble 3D micro molds for complex-shaped lipid microparticles

Arnaud Bertsch, Jürgen Brugger, Jongeon Park

Micro and nanoparticles made from polymers, metals, ceramics, and lipids are crucial for biomedical devices, energy storage, and electronics. Traditional fabrication methods like grinding, milling, and emulsification result in monolithic shapes and heterog ...

2025

Thermal control of ionic transport and fluid flow in nanofluidic channels

Philippe Renaud, Arnaud Bertsch, Mojtaba Taghipoor

In this work, we report a nanofluidic gating mechanism that uses the thermal effect for modulating the ionic transport inside nanofluidic channels. The control of the ionic transport inside a nanochannel is demonstrated using electrical conductivity. A the ...

2015

Label-Free Recognition of Drug Resistance via Impedimetric Screening of Breast Cancer Cells

Philippe Renaud, Arnaud Bertsch, Robert Meissner, Bilge Eker

We present a novel study on label-free recognition and distinction of drug resistant breast cancer cells (MCF-7 DOX) from their parental cells (MCF-7 WT) via impedimetric measurements. Drug resistant cells exhibited significant differences in their dielect ...

Public Library of Science2013

Combining thermal scanning probe lithography and dry etching for grayscale nanopattern amplification

Giovanni Boero, Arnaud Bertsch, Andras Kis, Jürgen Brugger, Georg Fantner, Joffrey Pernollet, Zhenyu Wang, Xia Liu, Ana Conde Rubio, Berke Erbas, Mitali Banerjee, Marcos Penedo Garcia

Grayscale structured surfaces with nanometer-scale features are used in a growing number of applications in optics and fluidics. Thermal scanning probe lithography achieves a lateral resolution below 10 nm and a vertical resolution below 1 nm, but its maxi ...

Springernature2024

Pore Size Manipulation in 3D Printed Cryogels Enables Selective Cell Seeding

Philippe Renaud, Arnaud Bertsch, Ariane Rochat, Thomas Michael Braschler, Ludovic Serex, Amélie Barbara Hildegarde Béduer

Cryogels are macroporous materials that display remarkable properties, such as high pore interconnection, large surface to volume ratio, and high mechanical stability, making them good candidates for 3D cell culture. However, shaping cryogels remains chall ...

Wiley2018

Direct Observation of Transitions between Surface-Dominated and Bulk Diffusion Regimes in Nanochannels

Philippe Renaud, Arnaud Bertsch, Theo Lasser, Nicolas Durand, Claudio Dellagiacoma

The diffusion of charged proteins in liquid-filled nanometer-sized apertures with charged surfaces has been investigated with fluorescence correlation spectroscopy (FCS). Based on a two-dimensional (2D) multicomponent diffusion model, key parameters such a ...

2009

Thermal gate, a new tool for ionic transport control inside nanochannels

Philippe Renaud, Arnaud Bertsch, Mojtaba Taghipoor

Transport of ionic species solvated in electrolytes depends on temperature. This dependence is much stronger in nanofluidics than large scale since the surface charge also varies with temperature. In this work, we introduce a new tool for the modulation of ...

IEEE2015

Enclosed Electronic System for Force Measurements in Knee Implants

Kamiar Aminian, Philippe Renaud, Arnaud Bertsch, Peter Ryser, Eric Meurville, David Forchelet, Arash Arami, Matteo Simoncini

Total knee arthroplasty is a widely performed surgical technique. Soft tissue force balancing during the operation relies strongly on the experience of the surgeon in equilibrating tension in the collateral ligaments. Little information on the forces in th ...

Mdpi Ag2014

Performance Comparison of Shape Memory Polymer Structures Printed by Fused Deposition Modeling and Melt Electrowriting

Arnaud Bertsch, Jürgen Brugger, Taavet Kangur, Reza Farsi, Biranche Tandon

Fused deposition modeling (FDM) and melt electrowriting (MEW) are techniques that use polymer fibers as building blocks for printing complex 3D structures, with fibers at the macroscopic and micrometer scale. Here, FDM and MEW are used to produce fibers of ...

Wiley2024

Instrumented Prosthesis for Knee Implants Monitoring

Steve Tanner, Kamiar Aminian, Philippe Renaud, Catherine Dehollain, Arnaud Bertsch, Peter Ryser, Eric Meurville, Hooman Dejnabadi, Pierre-André Farine, Oguz Atasoy, Brigitte Jolles-Haeberli, Arash Arami, Willyan Hasenkamp Carreira, Shafqat Ali, Matteo Simoncini

In this work we present an instrumented smart knee prosthesis for in-vivo measurement of forces and kinematics. Studying the constraints, we designed minimal sensory systems to be placed in the polyethylene part of the prosthesis. The magnetic sensors and ...

IEEE2011

Droplet extraction module for the analysis of segmented flow generated by a neural probe

Philippe Renaud, Arnaud Bertsch, Guillaume Cédric Yves Petitpierre, Colin Darbellay

We recently developed a neural probe allowing to capture at high temporal resolution nano-volume droplets of interstitial fluid from the brain organized in a segmented flow. In order to enable the analysis of these small volume and low concentration drople ...

2016

Impedance spectroscopy of the cell/nanovolcano interface enables optimization for electrophysiology

Philippe Renaud, Arnaud Bertsch, Nicolas Grégoire Maïno

Volcano-shaped microelectrodes have demonstrated superior performance in measuring attenuated intracellular action potentials from cardiomyocyte cultures. However, their application to neuronal cultures has not yet yielded reliable intracellular access. Th ...

SPRINGERNATURE2023

Nanoliter Liquid Packaging in a Bioresorbable Microsystem by Additive Manufacturing and its Application as a Controlled Drug Delivery Device

Arnaud Bertsch, Jürgen Brugger, Cristina Martin Olmos, Jongeon Park

Precise packaging of nanoliter amounts of liquid in a microsystem is important for many biomedical applications. However, existing liquid encapsulation technologies have limitations in terms of liquid waste, evaporation, trapped bubbles, and liquid degrada ...

2023

Nafion/chitosan-wrapped CNT nanocomposite membrane for high-performance direct methanol fuel cells

Philippe Renaud, Arnaud Bertsch, Songmei Wu, Mohammad Mahdi Hasani-Sadrabadi

Here we show that the transport properties and electrochemical performance of polyelectrolyte membranes are improved through the dispersion of chitosan-wrapped carbon nanotubes, for direct methanol fuel cell applications. Methanol permeability is reduced v ...

Royal Soc Chemistry2013

Technology developments to initiate a next generation of Cochlear Implants

Arnaud Bertsch, André Mercanzini

In the framework of the EU-supported research project Healthy Aims, we developed a range of novel electrode arrays and related technologies for use in hearing prosthesis. This paper summarizes our ongoing research activities on alternative electrode manufa ...

IEEE2007