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Yves Leterrier

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Related publications (159)

Electrically conductive self-healing polymer composite coatings

Yves Leterrier, Véronique Michaud, Brennan Margaret Bailey

The goal of the research described herein is the fabrication and assessment of electrically conductive partially-cured epoxy coatings which, upon cracking, autonomously restore barrier, mechanical and electrical properties via a microcapsule based healing ...

2015

Antibacterial surfaces based on functionally graded photocatalytic Fe3O4@TiO2 core-shell nanoparticle/epoxy composites

Yves Leterrier, César Pulgarin, Sami Rtimi, Tommaso Nardi

Functionally graded epoxy composites with various concentration profiles of Fe3O4@TiO2 core-shell nanoparticles (NPs) were synthetized and characterized, with focus on their antibacterial properties. The NPs consisted of rutile, anatase, magnetite and hema ...

RSC Publishing2015

Superhard, Antireflective Texturized Coatings Based on Hyperbranched Polymer Composite Hybrids for Thin-Film Solar Cell Encapsulation

Christophe Ballif, Yves Leterrier, Andreas Schueler, Franz-Josef Haug, Marina Aymara González Lazo

In this study, we demonstrate by simulation and experiment the antireflective (AR) performance of hyperbranched polymer (HBP) nanocomposites textures replicated from a moth-eye pattern using ultraviolet (UV) nanoimprint lithography. A UV-curable acrylated ...

2015

Process influences on the structure, piezoelectric, and gas-barrier properties of PVDF-TrFE copolymer

Dragan Damjanovic, Yves Leterrier, Alex Dommann, Antonia Neels, Olha Sereda

The influence of annealing between the Curie transition and the melting point of solvent cast polyvinylidene fluoride trifluoroethylene copolymer films on the crystalline structure, mechanical and electrical properties, and oxygen permeability is investiga ...

2014

UV-Cured Cellulose Nanofiber Composites with Moisture Durable Oxygen Barrier Properties

Yves Leterrier, John Christopher Plummer, Lars Berglund, Tommaso Nardi, Sylvain Cyril Claude Galland

Nanocomposites based on 10 to 60 vol % cellulose nanofibers (NFC) in a photopolymerizable hyperbranched acrylate matrix were prepared. Unmodified NFC and NFC chemically modified with a silane coupling agent and with ceric ammonium nitrate for direct polyme ...

2014

Effect of silane coupling agent on the morphology, structure, and properties of poly(vinylidene fluoride-trifluoroethylene)/BaTiO3 composites

Dragan Damjanovic, Yves Leterrier, Véronique Michaud, Sara Dalle Vacche

Micron- and submicron-sized barium titanate (BaTiO3) particles, untreated and surface modified with aminopropyl triethoxy silane, were incorporated in poly(vinylidene fluoride-trifluoroethylene) to fabricate composites with up to 60 vol% of ceramic phase. ...

Springer Verlag2014

Fe3O4 nanoparticles and nanocomposites with potential application in biomedicine and in communication technologies: Nanoparticle aggregation, interaction, and effective magnetic anisotropy

Yves Leterrier, Marco Sangermano, Tommaso Nardi

Magnetite nanoparticles with a size of 5-6 nm with potential impact on biomedicine and information/communication technologies were synthesized by thermal decomposition of Fe(acac)(3) and subsequently coated with a silica shell exploiting a water-in-oil syn ...

American Institute of Physics2014

Effect of annealing and silylation on the strength of melt-spun Ni-Mn-Ga fibres and their adhesion to epoxy

Yves Leterrier, Véronique Michaud, Susanne Glock, Edgars Sparnins

Single crystals of ferromagnetic Ni-Mn-Ga shape memory alloys show magnetic-field and stress induced twinning, leading to shape memory. Adaptive composites can thus be produced by embedding single crystalline particles or bamboo-structured Ni-Mn-Ga fibres ...

2014

A novel synthetic strategy for bioinspired functionally graded nanocomposites employing magnetic field gradients

Ayat Karimi, Yves Leterrier, Tommaso Nardi

In order to mimic the complex architecture of many bio-materials and synthesize composites characterized by continuously graded composition and mechanical properties, an innovative synthetic strategy making use of magnetic field gradients and based on the ...

2014

Viscoelastic phase diagram of fluorinated and grafted polymer films and proton-exchange membranes for fuel cell applications

Yves Leterrier

The influence of temperature and moisture activity on the viscoelastic behavior of fluorinated membranes for fuel cell applications was investigated. Uncrosslinked and crosslinked ethylene tetrafluoroethylene (ETFE)-based proton-conducting membranes were p ...

2013

Superhard transparent hybrid nanocomposites for high fidelity UV-nanoimprint lithography

Yves Leterrier, Maïté Blank, Marina Aymara González Lazo

Transparent hyperbranched acrylate nanocomposites were produced using different combinations of silica nanoparticles and silicon-based sol-gel precursors. The nanocomposites were processed using a dual-cure UV polymerization and condensation scheme. The vi ...

2013

UV-cured transparent magnetic polymer nanocomposites

Yves Leterrier, Marco Sangermano, Tommaso Nardi

Magnetite nanoparticles are synthesized by thermal decomposition of Fe(acac)(3) and subsequently coated with a silica shell exploiting a water-in-oil synthetic procedure. The as-produced nanopowder is mixed with a photocurable hyperbranched resin and the p ...

2013

Encapsulated Microstructures for Daylighting and Seasonal Thermal Control

Yves Leterrier, Jean-Louis Scartezzini, Andreas Schueler, André Gabriel Kostro, Rémy Teuscher, Marina Aymara González Lazo

2012

Novel Colored Esthetical and Lightweight Photovoltaic Tiles for Full Building Integration

Christophe Ballif, Yves Leterrier, Christian Roecker, Jean-Louis Scartezzini, Josef Andreas Schuler, Matthieu Mottet, Valentin Chapuis, Martin Joly, Stefan Mertin, Robert James Tween

2012

Dual cure compositions, related hybrid nanocomposite materials and dual cure process for producing same

Yves Leterrier, Valérie Geiser

The present invention concerns a dual cure composition comprising a radiation curable polymer precursor, solid particles, an organometallic precursor and a coupling agent, a hybrid organic/inorganic nanocomposite material produced using said dual cure comp ...

2012

UV-intensity, temperature and dark-curing effects in cationic photo-polymerization of a cycloaliphatic epoxy resin

Yves Leterrier, Véronique Michaud, Basile Golaz

A difunctional cycloaliphatic epoxy monomer was cationically photo-polymerized in the presence of a diaryliodonium salt photoinitiator and an isopropyl thioxanthone photosensitizer at different temperatures and UV intensities. The photo-polymerization kine ...

2012

Low-Stress Hyperbranched Polymer/Silica Nanostructures Produced by UV Curing, Sol/Gel Processing and Nanoimprint Lithography

Yves Leterrier, Valérie Geiser

Nanocomposite materials based on a HBP and silica are produced using either a dual-cure sol/gel and photopolymerization process or by mixing silica nanoparticles with the HBP. In both cases the conversion of the HBP is independent of composition and obeys ...

2012

Embedded microstructures for daylighting and seasonal thermal control

Yves Leterrier, Jean-Louis Scartezzini, Andreas Schueler, André Gabriel Kostro, Mario Geiger, Marina Aymara González Lazo, Nicolas Jolissaint

A novel concept for an advanced fenestration system was studied and samples were produced to demonstrate the feasibility. The resulting novel glazing will combine the functions of daylighting, glare protection, and seasonal thermal control. Coated microstr ...

Spie-Int Soc Optical Engineering2012

The effect of processing conditions on the morphology, thermomechanical, dielectric, and piezoelectric properties of P(VDF-TrFE)/BaTiO3 composites

Dragan Damjanovic, Yves Leterrier, Véronique Michaud, Sara Dalle Vacche

In this study (0-3) P(VDF-TrFE)/BaTiO3 composites containing up to 60 vol% of ceramic phase were prepared by solvent casting or compression molding. Their thermomechanical, dielectric, and piezoelectric properties were investigated, and discussed in the li ...

Springer Verlag2012

UV-nanoimprint lithography and large area roll-to-roll texturization with hyperbranched polymer nanocomposites for light-trapping applications

Aïcha Hessler-Wyser, Yves Leterrier, Philippe Couty, Diego Fischer, Rémy Teuscher, Caroline Calderone, Marina Aymara González Lazo

Light-trapping textures were produced in hyperbranched polymer (HBP) silica nanocomposites using a UV-nanoimprint lithography (UVNIL) replication method, either in batch or roll-to-roll processes. The hardness of the HBP was found to increase by a factor o ...

Elsevier2012

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