Publications de Alexandre Poulin

Printed Humidity Sensors from Renewable and Biodegradable Materials

Danick Briand, James Alec Pierce Bourely, Alexandre Poulin, Xavier Aeby

Wiley2022

High-speed mechano-active multielectrode array for investigating rapid stretch effects on cardiac tissue

Herbert Shea, Matthias Imboden, Samuel Rosset, Alexandre Poulin, Christian Dellenbach, Stephan Rohr, Etienne de Coulon

Systematic investigations of the effects of mechano-electric coupling (MEC) on cellular cardiac electrophysiology lack experimental systems suitable to subject tissues to in-vivo like strain patterns while simultaneously reporting changes in electrical act ...

Nature Research2019

Taming the viscoelastic creep of dielectric elastomer actuators

Herbert Shea, Samuel Rosset, Alexandre Poulin

We present a simple open-loop method to suppress the viscoelastic drift of dielectric elastomer actuators (DEAs). Viscoelastic creep is one of the drawbacks of DEAs, especially when made with acrylic elastomer membranes (VHB). This leads to a time-dependen ...

SPIE-INT SOC OPTICAL ENGINEERING2019

Integrated elastomer-based device for measuring the mechanics of adherent cell monolayers

Herbert Shea, Alexandre Poulin, Cristina Martin Olmos, Francesca Sorba

Cells in the body collectively sustain mechanical deformations in almost all physiological functions. From the morphogenesis stage, cells' ability to sustain stress is essential for the body's well-being. Several pathologies have been associated with abnor ...

2019

An open-loop control scheme to increase the speed and reduce the viscoelastic drift of dielectric elastomer actuators

Samuel Rosset, Alexandre Poulin

We present a simple open-loop method to increase the response speed and suppress the viscoelastic creep of dielectric elastomer actuators. The parameters of the model can be extracted from two simple measurements: a strain vs. voltage ramp, and the strain ...

2019

The NERD setup: assessing the life time of electrodes for dielectric elastomer transducers

Herbert Shea, Samuel Rosset, Alexandre Poulin, Samuel Schlatter, Christine Anne de Saint-Aubin

2018

An ultra-fast mechanically active cell culture substrate

Herbert Shea, Alexandre Poulin, Cristina Martin Olmos, Matthias Imboden, Samuel Rosset, Francesca Sorba

We present a mechanically active cell culture substrate that produces complex strain patterns and generates extremely high strain rates. The transparent miniaturized cell stretcher is compatible with live cell microscopy and provides a very compact and por ...

Nature Research2018

Assessing the degradation of compliant electrodes for soft actuators

Herbert Shea, Samuel Rosset, Alexandre Poulin, Christine Anne de Saint-Aubin

We present an automated system to measure the degradation of compliant electrodes used in dielectric elastomer actuators (DEAs) over millions of cycles. Electrodes for DEAs generally experience biaxial linear strains of more than 10%. The decrease in elect ...

American Institute of Physics2017

Flexible Zinc-Tin Oxide Thin Film Transistors Operating at 1 kV for Integrated Switching of Dielectric Elastomer Actuators Arrays

Danick Briand, Herbert Shea, Samuel Rosset, Alexandre Poulin, Alexis Pierre Henri Marette, Nadine Besse

Flexible high-voltage thin- lm transistors (HVTFTs) operating at more than 1 kV are integrated with compliant dielectric elastomer actuators (DEA) to create a exible array of 16 independent actuators. To allow for high-voltage operation, the HVTFT implemen ...

Wiley-Blackwell2017

Optimization of thin-film highly-compliant elastomer sensors for contractility measurement of muscle cells

Herbert Shea, Cristina Martin Olmos, Matthias Imboden, Samuel Rosset, Alexandre Poulin, Francesca Sorba, Mélanie Favre, Oluwaseun Adelowo Araromi

Test assays capable of providing quantitative characterization of the contraction of cardiac and smooth muscle cells are of great need for drug development and screening. Several methodologies have been proposed for achieving measurement of cell contractil ...

Elsevier Science Bv2016