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Yves Leterrier

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Publications associées (159)

Lab-on-a-chip for label-free multi-detection of residual antibiotics in milk

Yves Leterrier, Abdeljalil Sayah, Guillaume Suarez

2008

Evaluation of toughness by finite fracture mechanics from crack onset strain of brittle coatings on polymers

Yves Leterrier, Grégory Tornare

Crack onset strain measurements of a confined layer in tension provide the means for layer toughness estimation. The procedure can be simplified if steady-state conditions prevail starting from the commencement of crack propagation, an assumption frequentl ...

Elsevier2008

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

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

Cohesion and adhesion of nanoporous TiO2 coatings on titanium wires for photovoltaic applications

Yves Leterrier, John Christopher Plummer, Nelson Da Costa

The working electrode of a dye-sensitized photovoltaic fiber is constituted of a porous TiO2 coated titanium wire. The cohesion and adhesion of such a brittle oxide coating on the ductile metal substrate are identified as crucial factors in maintaining pho ...

Elsevier2008

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

Yves Leterrier, Julien Rion, Samuel Stutz

The skin wrinkling phenomenon was investigated in case of ultralight sandwich structures with honeycomb core manufactured by one shot vacuum bag processing. A relation between process pressure and compressive strength of the skin was established. ...

FEUP, Porto, Portugal2008

Integrated System for the Parallel Detection of Multiple Antibiotics in Milk

Yves Leterrier, Abdeljalil Sayah, Valérie Geiser, Simon Pasche

2008

Models and Experiments of Mechanical Integrity for Flexible Displays

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

Mechanical properties of SiOx gas barrier coatings on polyester films

Yves Leterrier

This paper reports the impressive mechanical properties of 1 μm thick carbon-containing SiOx gas barrier coatings, characterised using the uniaxial fragmentation test. Such coatings have been found to act as excellent barriers to water vapour permeation pa ...

2008

Mechanical integrity of dye-sensitized photovoltaic fibres

Yves Leterrier, John Christopher Plummer

The development of photovoltaic (PV) devices based on dye-sensitized TiO2-coated Ti fibers has opened up exciting possibilities for novel PV textile applications. The cohesion and adhesion of the TiO2 layer are identified as crucial factors in maintaining ...

2008

Composites and methods for their production

Yves Leterrier, John Christopher Plummer, Marlene Rodlert

Intercalates and exfoliates formed from layered materials and dendritic polymers are disclosed, together with the uses of these materials, e.g. in producing composite materials. The dispersion of layered materials in a dendritic polymer matrix (hyperbranch ...

2008

Acrylated Hyperbranched Polymer Photoresist for Ultra-Thick and Low-Stress High Aspect Ratio Micropatterns

Yves Leterrier, Lars Schmidt

Different photocurable acrylates, including two hyperbranched monomers, are compared with an epoxy negative-tone photoresist (SU-8) with respect to their suitability for the fabrication of ultra-thick polymer microstructures in a photolithographic process. ...

Institute of Physics2008

Improved Materials For Dielectric Elastomer Actuators

Yves Leterrier, Frank Nüesch, John Christopher Plummer, Martin Molberg

2008

Analysis of thin film cracking and buckling on compliant substrate by fragmentation test

Yves Leterrier

2007

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

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

Electro-fragmentation of dielectric thin films on flexible polymer substrates

Yves Leterrier, Bastian Meylan

2007

Hyperbranched polymer for micro devices

Yves Leterrier, Lars Schmidt

The invention relates to novel polymer-based microstructures, with outstanding shape accuracy and cost-effective processing. The novel polymers are based on hyperbranched macromolecules and enable remarkable property combination such as reduced shrinkage a ...

2007

Intrinsic, thermal and hygroscopic residual stresses in thin gas-barrier films on polymer substrates

Yves Leterrier, Grégory Tornare

Intrinsic, thermal, and hygroscopic contributions to the in-plane residual stress in silicon nitride films on polyimide substrates are identified, based on iso- hygric thermal ramps and isothermal relative humidity jumps, combined with non-linear elastic m ...

2007

Mechanical properties of carbon-modified silicon oxide barrier films deposited by plasma enhanced chemical vapor deposition on polymer substrates

Yves Leterrier, Grégory Tornare

Cohesive and adhesive properties of silicon oxide barrier coatings deposited from an oxygen/hexamethyldisiloxane gas mixture by plasma enhanced chemical vapor deposition, with controlled incorporation of carbon on 12 mm thick polyethylene terephtalate film ...

2007

Analysis of thin film cracking and buckling on compliant substrate by fragmentation test

Yves Leterrier

Application of coating fragmentation test for determination of coating properties is considered. A probabilistic model of coating fragmentation under uniaxial tensile loading is applied for coating and interface property identification of thin brittle coat ...

2007

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

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