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Herbert Shea

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Publications associées (163)

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

Soft tunable diffractive optics with multifunctional transparent electrodes enabling integrated actuation

Samuel Rosset, Herbert Shea, Xiaobin Ji

We present a stretchable tunable transmission grating in which the optical surface serves simultaneously as an electrode for electrostatic actuation. Tunable optics based on elastomers allow for a large tuning range, but integrating an actuator generally s ...

AIP American Institute of Physics2016

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

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

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

Small, fast, and tough: Shrinking down integrated elastomer transducers

Samuel Rosset, Herbert Shea

We review recent progress in miniaturized dielectric elastomer actuators (DEAs), sensors, and energy harvesters. We focus primarily on configurations where the large strain, high compliance, stretchability, and high level of integration offered by dielectr ...

Amer Inst Physics2016

Versatile soft grippers with intrinsic electroadhesion based on multifunctional polymer actuators

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

A highly versatile soft gripper that can handle an unprecedented range of object types is developed based on a new design of dielectric elastomer actuators employing an interdigitated electrode geometry, simultaneously maximizing both electroadhesion and e ...

Wiley-V C H Verlag Gmbh2016

Biomimetic Underwater Robots Based on Dielectric Elastomer Actuators

Dario Floreano, Herbert Shea, Jun Shintake

Dielectric elastomer actuators (DEAs), a soft actuator technology, hold great promise for biomimetic underwater robots. The high-voltages required to drive DEAs can however make them challenging to use in water. This paper demonstrates a method to create D ...

Ieee2016

Dielectric Elastomer Actuator for Mechanical Loading of 2D Cell Cultures

Samuel Rosset, Herbert Shea, Alexandre Poulin

We demonstrate the use of dielectric elastomer actuators (DEAs) for mechanical stimulation of cells in vitro. The development of living tissues is regulated by their mechanical environment through the modification of fundamental cellular functions such as ...

Royal Society of Chemistry2016

Fabrication of transmissive dielectric elastomer actuator driven tunable optical gratings with improved tunability

Samuel Rosset, Herbert Shea, Manu Bala Krishnan

We present an electrically actuated tunable optical grating based on dielectric elastomer actuators. A simple fabrication protocol is presented, which integrates the grating with the actuating mechanism both made of soft elastomers, improving the tunabilit ...

Spie-Soc Photo-Optical Instrumentation Engineers2016

Comparing Direct and Indirect Thrust Measurements from Passively Fed and Highly Ionic Electrospray Thrusters

Herbert Shea, Simon Dandavino, Daniel George Courtney

Highly ionic beams of several hundred microampere per squared centimeter have been measured from porous glass ionic liquid electrospray sources fabricated using a conventional mill. The thrust output from three prototype devices, two emitting the ionic liq ...

American Institute of Aeronautics and Astronautics2016

Low-loss Millimeter-wave Phase Shifters Based on Mechanical Reconfiguration

Juan Ramon Mosig, Julien Perruisseau-Carrier, Samuel Rosset, Herbert Shea, Pietro Romano, Oluwaseun Adelowo Araromi

We propose different concepts of mechanically reconfigurable true-time-delay phaseshifters using micro-actuators at millimeter-waves (MMW). The mechanical reconfiguration allows to achieve phase shift reconfiguration with very low losses. One of the propos ...

2015

Ultrafast All-Polymer Electrically Tunable Silicone Lenses

Samuel Rosset, Luc Maffli, Herbert Shea, Michele Ghilardi

Dielectric elastomer actuators (DEA) are smart lightweight flexible materials integrating actuation, sensing, and structural functions. The field of DEAs has been progressing rapidly, with actuation strains of over 300% reported, and many application conce ...

Wiley-Blackwell2015

Standards for dielectric elastomer transducers

Samuel Rosset, Herbert Shea, Claire Jean-Mistral

Dielectric elastomer transducers consist of thin electrically insulating elastomeric membranes coated on both sides with compliant electrodes. They are a promising electromechanically active polymer technology that may be used for actuators, strain sensors ...

Institute of Physics2015

Maximizing the displacement of compact planar dielectric elastomer actuators

Samuel Rosset, Herbert Shea, Oluwaseun Adelowo Araromi

We present a model and its experimental validation for the optimization of the in-plane displacement of a rigid platform mounted on a compact dielectric elastomer actuator. Unlike the situation in which the mechanical prestretch of the membrane is maintain ...

2015

Fragmentation in Time-of-Flight Spectrometry-Based Calculations of Ionic Electrospray Thruster Performance

Herbert Shea, Daniel George Courtney

A method has been presented for accounting for ion fragmentation that occurs within the nonzero field of an ionic electrospray thruster. Given the complexities associated with direct thrust measurements, indirect means (and time-of-flight (TOF) in particul ...

American Institute of Aeronautics and Astronautics2015

Rollable Multisegment Dielectric Elastomer Minimum Energy Structures for a Deployable Microsatellite Gripper

Samuel Rosset, Herbert Shea, Muriel Richard, Jun Shintake, Volker Gass, Irina Gavrilovich, Oluwaseun Adelowo Araromi

Debris in space presents an ever-increasing problem for spacecraft in Earth orbit. As a step in the mitigation of this issue, the CleanSpace One (CSO) microsatellite has been proposed. Its mission is to perform active debris removal of a decommissioned nan ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Optimization of the force and power consumption of a microfabricated magnetic actuator

Herbert Shea, Juan José Zarate

The force (F) and the power consumption (P ) of a magnetic actuator are modeled, measured and optimized in the context of developing micro-actuators for large arrays, such as in portable tactile displays for the visually impaired. We present a novel analyt ...

Elsevier2015

Printing low-voltage dielectric elastomer actuators

Samuel Rosset, Herbert Shea, Alexandre Poulin

We demonstrate the fabrication of fully printed thin dielectric elastomer actuators (DEAs), reducing the operation voltage below 300V while keeping good actuation strain. DEAs are soft actuators capable of strains greater than 100% and response times below ...

AIP American Institute of Physics2015

Influences of porous reservoir Laplace pressure on emissions from passively fed ionic liquid electrospray sources

Herbert Shea, Daniel George Courtney

Passively fed ionic liquid electrospray sources are capable of efficiently emitting a variety of ion beams with promising applications to spacecraft propulsion and as focused ion beams. Practical devices will require integrated or coupled ionic liquid rese ...

AIP American Institute of Physics2015

A 10 nN resolution thrust-stand for micro-propulsion devices

Herbert Shea, Subha Chakraborty, Daniel George Courtney

We report on the development of a nano-Newton thrust-stand that can measure up to 100 μN thrust from different types of microthrusters with 10 nN resolution. The compact thrust-stand measures the impingement force of the particles emitted from a microthrus ...

American Institute of Physics2015

Stretchable and Transparent THz Reflectarrays Based on PDMS

Juan Ramon Mosig, Samuel Rosset, Herbert Shea, Michele Tamagnone, Pietro Romano, Santiago Capdevila Cascante

2015

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