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Yves Leterrier

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Related publications (159)

Page 3 of 8

Design and fabrication of compositionally graded inorganic oxide thin films: Mechanical, optical and permeation characteristics

Jan-Anders Edvin Maansson, Yves Leterrier, Xavier Bulliard

Different types of inorganic oxide films composed of a chemical composition gradient single layer were designed, fabricated and characterized. Compositionally graded thin films were created by power-controlled co-sputtering of alumina (Al2O3) and silica (S ...

Elsevier2010

Thermo-hygro-mechanical behaviour of ultrathin multilayer composite materials for flexible display applications

Jan-Anders Edvin Maansson, Yves Leterrier

Flexible displays form complex structures joining together multiple layers of very various materials: metal or plastic flexible substrate, barrier and encapsulation layers, thin-films of transistor and optoelectronic devices. Residual stresses are inherent ...

2007

Frequency dependent dielectric and mechanical behaviour of elastomers for actuator applications

Jan-Anders Edvin Maansson, Yves Leterrier, John Christopher Plummer, Frank Nüesch

The low frequency mechanical and dielectric behavior of three different elastomers has been investigated by dynamic mechanical analysis and dielectric spectroscopy, with the aim of accounting for the frequency dependence of the characteristics of the corre ...

American Institute of Physics2009

Recent Advances in Encapsulation of Flexible Bioelectronic Implants: Materials, Technologies, and Characterization Methods

Yves Leterrier, Stéphanie Lacour, Kyungjin Kim, Massimo Mariello, Kangling Wu

Bioelectronic implantable systems (BIS) targeting biomedical and clinical research should combine long-term performance and biointegration in vivo. Here, recent advances in novel encapsulations to protect flexible versions of such systems from the surround ...

Wiley-V C H Verlag Gmbh2022

Interface interactions in hybrid organosilane-nitride films on polymer substrates

Jan-Anders Edvin Maansson, Yves Leterrier

Organic-inorganic hybrid coatings are becoming increasingly important due to their unique property combination [1, 2], including high optical transparency, improved scratch and abrasion resistance and excellent weathering, thanks to the synergism between t ...

2007

Evaluation of interfacial stress transfer efficiency by coating fragmentation test

Jan-Anders Edvin Maansson, Yves Leterrier, Grégory Tornare

Probabilistic model of coating fragmentation under uniaxial tensile loading is developed. Analytical expressions of the crack spacing evolution are obtained for small-strain and large-strain fragmentation regimes. The model is applied for coating and inter ...

2007

Extended Barrier Lifetime of Partially Cracked Organic/Inorganic Multilayers for Compliant Implantable Electronics

Julien Emile Carron, Yves Leterrier, Stéphanie Lacour, Giuseppe Schiavone, Kyungjin Kim, Kangling Wu

Flexible and soft bioelectronics display conflicting demands on miniaturization, compliance, and reliability. Here, the authors investigate the design and performance of thin encapsulation multilayers against hermeticity and mechanical integrity. Partially ...

WILEY-V C H VERLAG GMBH2021

Diffusion-barrier coating for protection of moisture and oxygen sensitive devices

Jan-Anders Edvin Maansson, Yves Leterrier, Bandeep Singh

Barrier film for encapsulation of oxygen and moisture sensitive devices comprising a base polymer substrate and applied onto the base substrate, a barrier layer comprising an inorganic coating deposited by a vapour deposition method, characterised in that ...

2008

Cohesive and adhesive properties of polycaprolactone/silica hybrid coatings on poly(methyl methacrylate) substrates

Jan-Anders Edvin Maansson, Yves Leterrier, Bandeep Singh

Organic–inorganic hybrid materials were prepared using the sol–gel process in order to improve the scratch resistance of poly(methyl methacrylate) (PMMA) substrates. Sol–gel solutions based on tetraethoxysilane and α,ω-triethoxysilane terminated polycaprol ...

2006

High diffusion barrier and piezoelectric nanocomposites based on polyvinylidene fluoride-trifluoroethylene copolymer and hydrophobized clay

Yves Leterrier, Dragan Damjanovic, Antonia Neels, Sara Dalle Vacche, Alex Dommann, Olha Sereda

Nanocomposites based on polyvinylidene fluoride– trifluoroethylene copolymer and up to 4 vol % of hydrophobized clay nanoparticles are investigated. The structure, piezoelectric properties, and oxygen permeability of solvent cast films are analyzed before ...

Wiley-Blackwell2017

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

Jan-Anders Edvin Maansson, Véronique Michaud, Yves Leterrier, 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

Coating fragmentation by branching cracks at large biaxial strain

Yves Leterrier

The fragmentation behaviour of a thin brittle coating attached to a ductile substrate subjected to equibiaxial quasi-static in-plane tension is studied. The experimentally observed cracking patterns are related to repetitively branching coating cracks. The ...

2007

Prediction of the adhesive fillet size for skin to honeycomb core bonding in ultra-light sandwich structures

Jan-Anders Edvin Maansson, Yves Leterrier

The formation of resin fillet between honeycomb core cell walls and skin in light sandwich structures was studied to gain a better understanding of the bonding process. A method was developed for tailoring the amount of adhesive between 8 and 80 g/m2. The ...

Elsevier2008

Residual stresses in diffusion barrier films on polymer substrates for flexible displays

Jan-Anders Edvin Maansson, Yves Leterrier

A theoretical modeling framework is proposed to follow shape and residual stress evolutions of layered flexible display structures with respect to deposition, ambient temperature and relative humidity conditions. This model couples the mechanical equilibri ...

2007

Models and Experiments of Mechanical Integrity for Flexible Displays

Jan-Anders Edvin Maansson, Yves Leterrier

Flexible displays present a challenging problem in terms of mechanical integrity, a result of the considerable hygro-thermomechanical contrast between the inorganic, brittle device layers and the compliant polymer substrates. This paper reviews the main ap ...

2008

Magnesium Optrodes for Real-Time Optical Monitoring of Water Transport in Ultrathin Encapsulations for Bioelectronics

Yves Leterrier, Stéphanie Lacour, Hatice Altug, Massimo Mariello, Deepthy Kavungal, Mélanie Nelly Rouèche, Marion Bianca Cleusix

Recent studies investigated the hydrolysis of Magnesium (Mg) thin films, highlighting their potential use in biodegradable devices. Quantitatively monitoring the degradation rate and morphological changes of Mg through optical methods and light-delivery de ...

2024

Oxygen permeation, mechanical and structural properties of multilayer diffusion barrier coatings on polypropylene

Jan-Anders Edvin Maansson, Yves Leterrier, Judith Helen Waller

To improve temperature durability for autoclaving of SiOx diffusion barrier coatings on polypropylene, plasma polymerized hexamethyldisiloxane (pp-HMDSO) is applied by plasma enhanced chemical vapour deposition as interlayer material and compared with resu ...

Institute of Physics2010

Influence of process pressure on local facesheet instability for ultralight sandwich structures

Jan-Anders Edvin Maansson, Yves Leterrier, Samuel Stutz

The skin wrinkling phenomenon was investigated in the case of ultra-light sandwich structures with a honeycomb core manufactured by one-shot vacuum bag processing. The interplay between process pressure and compressive strength of the skin was established. ...

2009

UV-cured transparent magnetic polymer nanocomposites

Jan-Anders Edvin Maansson, Yves Leterrier, Tommaso Nardi, Marco Sangermano

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

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

Jan-Anders Edvin Maansson, Yves Leterrier, Fabiane Costa Oliveira Moffat

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