Concept

Clathrate hydrate

Publications associées (84)

Hydrogen Sensors based on Nanoscaled Discontinuities in Palladium

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Oscar Vazquez Mena, Thomas Kiefer, Arnaud Salette

In this project we develop hydrogen sensors based on nanoscaled discontinuities (nanogaps) in palladium (Pb). These nanogaps reversibly close and open upon hydrogen/air cycling due to an increased lattice constant in the hydrated state. Therewith, an elect ...

2008

Microbial growth on partially saturated rough surfaces: Simulations in idealized roughness networks

Dani Or

A new model is developed to study the effect of aqueous phase configuration on microbial growth on rough surfaces under different hydration conditions. Surface roughness is idealized using a network of conical pits (sites) on a regular lattice connected by ...

American Geophysical Union2007

Development of the Mechanical Properties of an Ultra-High Performance Fiber Reinforced Concrete (UHPFRC)

Eugen Brühwiler, Emmanuel Denarié, Marco Viviani, Katrin Habel

Knowledge of the mechanical properties, i.e. strength, stiffness and deformation capacity, of cementitious materials at any arbitrary time is fundamental for operations such as removal of formwork, prestressing or cracking control. This paper presents a st ...

2006

Fate of rising methane bubbles in stratified waters: How much methane reaches the atmosphere?

Alfred Johny Wüest

[ 1] There is growing concern about the transfer of methane originating from water bodies to the atmosphere. Methane from sediments can reach the atmosphere directly via bubbles or indirectly via vertical turbulent transport. This work quantifies methane g ...

Amer Geophysical Union2006

Exceptional ideal strength of carbon clathrates

Philippe Gillet

We study by means of ab initio calculations the ideal tensile and shear strengths of the C-46 clathrate phase. While its bulk modulus and elastic constants are smaller than in diamond, its strength is found to be in all directions larger than the critical ...

2004

Age of Himalayan bottom ice cores [2]

Jérôme Chappellaz

This paper is part of the special publication Gas hydrates: relevance to world margin stability and climatic change (eds J.P. Henriet and J. Mienert). The Antarctic and Greenland ice contains an almost direct record of past atmospheric CH 4. The record ove ...

Geological Society of London2004

Quantitative study of Portland cement hydration by X-ray diffraction/Rietveld analysis and independent methods

Karen Scrivener, Emmanuel Gallucci

X-ray diffraction (XRD) is a powerful technique for the study of crystalline materials. The technique of Rietveld refinement now enables the amounts of different phases in anhydrous cementitious materials to be determined to a good degree of precision. Thi ...

2004

Durability of ternary binders based on Portland cement, calcium aluminate cement and calcium sulfate

The applications of systems based on Portland Cement (PC), Calcium Aluminate Cement (CAC) and Calcium Sulphate (C$) are usually limited to indoor uses in the field of Building Chemistry because no durability data exist on the outdoor uses. These ternary bi ...

EPFL2004

Self-assembling biomaterials: L-lysine-dendron-substituted cholesteryl-(L-lactic acid)n

Harm-Anton Klok

This report describes the synthesis and supramolecular organization of a novel class of linear-dendritic block copolymers. The molecules, which are termed rodcoil dendrons, consist of a cholesterol moiety that is attached to L-lysine dendrons of three diff ...

2002

Coated, light-transmitting or reflecting substrate, used as optical component or window, e.g. lens, mirror or windscreen, has (per)fluoroalkylsilane coating produced by plasma etching, hydration, drying and gas phase deposition

Patrik Willi Hoffmann, Laura Barbieri

A method for the gas phase deposition of partially fluorinated or perfluorinated alkyl silanes onto a substrate in a reaction chamber includes cleaning the substrate, hydrating the substrate with steam, drying the substrate and silanization of the substrat ...

SWISSOPTIC AG (SWIS-Non-standard) ECOLE POLYTECHNIQUE FEDERALE LAUSANNE (ECOL-Non-standard)2002

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