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Herbert Shea

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Publications associées (163)

A Foldable Antagonistic Actuator

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

We report on an actuator based on dielectric elastomers that is capable of antagonistic actuation and passive folding. This actuator enables foldability in robots with simple structures. Unlike other antagonistic dielectric elastomer devices, our concept u ...

Institute of Electrical and Electronics Engineers2015

Dielectric elastomer generators that stack up

Samuel Rosset, Herbert Shea

This paper reports the design, fabrication, and testing of a soft dielectric elastomer power generator with a volume of less than 1 cm3. The generator is well suited to harvest energy from ambient and from human body motion as it can harvest from low frequ ...

Institute of Physics2015

High-resolution, large-area fabrication of compliant electrodes via laser ablation for robust, stretchable dielectric elastomer actuators and sensors

Samuel Rosset, Herbert Shea, Oluwaseun Adelowo Araromi

A key element in stretchable actuators, sensors and systems based on elastomer materials are compliant electrodes. While there exist many methodologies for fabricating electrodes on dielectric elastomers, very few succeed in achieve high-resolution pattern ...

Amer Chemical Soc2015

Variable Stiffness Actuator for Soft Robotics Using Dielectric Elastomer and Low-Melting-Point Alloy

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

A novel variable stiffness actuator composed of a dielectric elastomer actuator (DEA) and a low-melting-point-alloy (LMPA) embedded silicone substrate is demonstrated. The device which we call variable stiffness dielectric elastomer actuator (VSDEA) enable ...

IEEE2015

Model and design of dielectric elastomer minimum energy structures

Samuel Rosset, Herbert Shea, Jun Shintake, Oluwaseun Adelowo Araromi

Fixing a prestretched dielectric elastomer actuator (DEA) on a flexible frame allows transformation of the intrinsic in-plane area expansion of DEAs into complex three-dimensional (3D) structures whose shape is determined by a configuration that minimizes ...

Institute of Physics2014

Microfabricated electrospray emitter arrays with integrated extractor and accelerator electrodes for the propulsion of small spacecraft

Herbert Shea, Caglar Ataman, Simon Dandavino, Subha Chakraborty, Daniel George Courtney

Microfabricated electrospray thrusters could revolutionize the spacecraft industry by providing efficient propulsion capabilities to micro and nano satellites (1–100 kg). We present the modeling, design, fabrication and characterization of a new generation ...

Iop Publishing Ltd2014

A ToF-MS with a Highly Efficient Electrostatic Ion Guide for Characterization of Ionic Liquid Electrospray Sources

Herbert Shea, Caglar Ataman, Simon Dandavino, Subha Chakraborty, Daniel George Courtney

We report on the development of a time-of-flight (ToF) mass spectrometer with a highly efficient electrostatic ion guide for enhancing detectability in ToF mass spectrometry. This 65-cm long ion guide consists of 13 cascaded stages of Einzel lens to collec ...

Springer2014

Tunable millimeter-wave phase shifter based on dielectric elastomer actuation

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

A very low-loss tunable millimeter-wave phase shifter driven by dielectric elastomer actuators (DEAs) is presented. The device consists of a fixed coplanar waveguide (CPW) and two metallic loading strips suspended on an elastomer membrane. The horizontal o ...

American Institute of Physics2014

Optical pumping in a microfabricated Rb vapor cell using a microfabricated Rb discharge light source

Herbert Shea, Vinu Lalgudi Venkatraman

Miniature (

American Institute of Physics2014

Microwave to terahertz reconfiguration of antenna devices using dielectric elastomer micro-actuators

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

2014

Electroactive polymer based reconfigurable phase shifter at millimeter-waves

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

2014

Electromagnetic characterisation of flexible conductive membranes at millimetre-waves

Julien Perruisseau-Carrier, Samuel Rosset, Luc Maffli, Herbert Shea, Pietro Romano

Presented is the experimental surface impedance characterisation of stretchable conductors at Ka-band, using a non-contact technique based on two-port rectangular waveguide measurements. Two different types of metallisations are analysed, namely gold ion i ...

Institution of Engineering and Technology2013

An electroactive polymer energy harvester for wireless sensor networks

Samuel Rosset, Herbert Shea

This paper reports the design, fabrication, and testing of a soft electroactive polymer power generator that has a volume of 1cm(3). The generator provides an opportunity to harvest energy from environmental sources to power wireless sensor networks becaus ...

Iop Publishing Ltd2013

Zipping dielectric elastomer actuators: characterization, design and modeling

Samuel Rosset, Luc Maffli, Herbert Shea

We report on miniature dielectric elastomer actuators (DEAs) operating in zipping mode with an analytical model that predicts their behavior. Electrostatic zipping is a well-known mechanism in silicon MEMS to obtain large deformations and forces at lower v ...

Iop Publishing Ltd2013

Surface impedance measurements of thin flexible metallization at millimeter-waves

Julien Perruisseau-Carrier, Samuel Rosset, Luc Maffli, Herbert Shea, Pietro Romano

2013

Improved electromechanical behavior in castable dielectric elastomer actuators

Samuel Rosset, Herbert Shea, Samin Akbari

Non-viscoelastic castable elastomers are replacing the polyacrylate VHB films in the new generations of dielectric elastomer actuators (DEAs) to achieve fast and reliable actuation. We introduce the optimum prestretch conditions to enhance the electromecha ...

American Institute of Physics2013

Flexible and stretchable electrodes for dielectric elastomer actuators

Samuel Rosset, Herbert Shea

Dielectric elastomer actuators (DEAs) are flexible lightweight actuators that can generate strains of over 100 %. They are used in applications ranging from haptic feedback (mm-sized devices), to cm-scale soft robots, to meter-long blimps. DEAs consist of ...

Springer2013

Proton-Radiation Tolerance of Silicon and SU-8 as Structural Materials for High-Reliability MEMS

Herbert Shea, Alex Dommann, Antonia Neels, Tobias Bandi

The susceptibility of single-crystal silicon and SU-8 resonators to proton-radiation induced degradation was investigated. Both materials are in widespread use for microsystems structures, thus the stability of the mechanical properties must be ensured ove ...

Institute of Electrical and Electronics Engineers2013

Self-sensing dielectric elastomer actuators in closed-loop operation

Samuel Rosset, Herbert Shea

Because of their large output strain, dielectric elastomer actuators (DEAs) have been proposed for tunable optics applications such as tunable gratings. However, the inherent viscoelastic drift of these actuators is an important drawback and closed-loop op ...

Iop Publishing Ltd2013

Microfabrication and characterization of an array of dielectric elastomer actuators generating uniaxial strain to stretch individual cells

Herbert Shea, Samin Akbari

Cells regulate their behavior in response to mechanical strains. Cell cultures to study mechanotransuction are typically cm2 in area, far too large to monitor single cell response. We have developed an array of dielectric elastomer microactuators as a tool ...

2012

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