Publications de Samuel Rosset | EPFL Graph Search

Fabrication of zipping electrostatic actuators incorporating inkjet-printed layers

Samuel Rosset, Herbert Shea, Giulio Grasso

Zipping electrostatic actuators operate by bending flexible electrodes using electrostatic forces. This principle allows the use of a wide range of dielectric and conductive materials. Additive Manufacturing (AM) techniques can be used to fabricate these a ...

SPIE-INT SOC OPTICAL ENGINEERING2021

Inkjet Printing of Complex Soft Machines with Densely Integrated Electrostatic Actuators

Samuel Rosset, Herbert Shea, Samuel Schlatter, Giulio Grasso

A multimaterial inkjet printing method for integrated soft multifunctional machines is reported, combining dense arrays of electrostatic actuators, multilayer electrical routing, and complex networks of microfluidic channels in one printing process. Most a ...

2020

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

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

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

Samuel Rosset, Herbert Shea, 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

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

Peta-pico-Voltron: An open-source high voltage power supply

Samuel Rosset, Samuel Schlatter

We present the design (hardware + software) of “Peta-pico-Voltron”, a low-current high voltage power supply for electrostatic actuators. Developed primarily for dielectric elastomer actuators, it offers a low-cost solution to generate user controllable vol ...

2018

An ultra-fast mechanically active cell culture substrate

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

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

Stretchable composite monolayer electrodes for low voltage dielectric elastomer actuators

Samuel Rosset, Herbert Shea, Francesca Sorba, Xiaobin Ji

2018

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

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

2018

Device having a plurality of latching micro-actuators and method of operating the same

Samuel Rosset, Herbert Shea, Nadine Besse, Juan José Zarate

An actuator device including a plurality of transducer actuators, and a common pneumatic actuation mechanism for shaping the plurality of transducer actuators, wherein each actuator of the plurality of transducer actuators includes a shape memory polymer m ...

2018

Electroadhesive device, system and method for gripping

Dario Floreano, Samuel Rosset, Herbert Shea, Jun Shintake, Bryan Edward Schubert

A device for electroadhesion and conversion of electrical energy into mechanical energy, for example electrostatic actuation, is provided, including a soft polymeric dielectric support having at least two sets of overlapping electrodes patterned respective ...

2017

Full integration of a dielectric elastomer actuator with a flexible 1 kV thin-film transistor

Samuel Rosset, Herbert Shea, Danick Briand, Alexis Pierre Henri Marette, Christine Anne de Saint-Aubin

2017

Understanding Graphics on a Scalable Latching Assistive Haptic Display Using a Shape Memory Polymer Membrane

Samuel Rosset, Herbert Shea, Nadine Besse, Juan José Zarate

2017

High-cycle electromechanical aging of dielectric elastomer actuators with carbon-based electrodes

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

We present high-cycle aging tests of Dielectric Elastomer Actuators (DEAs) based on silicone elastomers, reporting on the time-evolution of actuation strain and of electrode resistance over millions of cycles. We compare several types of carbon-based elect ...

Institute of Physics2017

Inkjet 3D printing of UV and thermal cure silicone elastomers for dielectric elastomer actuators

Samuel Rosset, Herbert Shea, Samuel Schlatter, David James McCoul

Dielectric elastomer actuators (DEAs) are an attractive form of electromechanical transducer, possessing high energy densities, an efficient design, mechanical compliance, high speed, and noiseless operation. They have been incorporated into a wide variety ...

Institute of Physics2017

Assessing the degradation of compliant electrodes for soft actuators

Samuel Rosset, Herbert Shea, 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

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

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

Flexible Active Skin: Large Reconfigurable Arrays of Individually Addressed Shape Memory Polymer Actuators

Samuel Rosset, Herbert Shea, Nadine Besse, Juan José Zarate

A high-resolution flexible active skin with a matrix of 32x24 individually addressable tactile pixels on a 4 mm pitch is reported, based on shape memory polymer (SMP) actuators. The intrinsic multistable nature of SMPs, and their more than hundred-fold var ...

Wiley2017

Fabrication process of silicone-based dielectric elastomer actuators

Samuel Rosset, Herbert Shea, Oluwaseun Adelowo Araromi, Samuel Schlatter

This contribution demonstrates the fabrication process of dielectric elastomer transducers (DETs). DETs are stretchable capacitors consisting of an elastomeric dielectric membrane sandwiched between two compliant electrodes. The large actuation strains of ...

Journal of Visualized Experiments2016

Multifunctional shape memory electrodes for dielectric elastomer actuators enabling high holding force and low-voltage multisegment addressing

Samuel Rosset, Herbert Shea, Nadine Besse, David James McCoul

Dielectric elastomer actuators (DEAs) are an attractive form of electromechanical transducer, possessing high energy densities, an efficient design, mechanical flexibility, high speed, and noiseless operation. They have been incorporated into a variety of ...

Institute of Physics2016