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Strong Coupling between Nanofluidic Transport and Interfacial Chemistry: How Defect Reactivity Controls Liquid-Solid Friction through Hydrogen Bonding

Publications associées (55)

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Liquid dynamics in ZrO2 nanoporous films

Majed Chergui, Frank van Mourik, Erwin Portuondo Campa

Time-resolved Optical Kerr Effect (OKE) measurements were used to det. the orientational dynamics of water and acetonitrile in the bulk and in pores of ZrO2 nanostructured films. The expts. were performed with a home-built OKE microscope, capable of provid ...

2007

Oleaginous plant seeds and seed by-products for water treatment

Julien Boucher

The treatment of water is needed for the supply of adequate quantity and quality of drinking water, as well as before the discharge of wastewater to the environment. Treatment technologies are often costly, involve chemicals that may have detrimental effec ...

EPFL2006

Sulfide-binding hemoglobins: effects of mutations on active-site flexibility

Majed Chergui

The dynamics of Hb I (HbI) from the clam Lucina pectinata, from wild-type sperm whale (SW) myoglobin, and from the L29F/H64Q/V68F triple mutant of SW, both unligated and bound to hydrogen sulfide (H2S), have been studied in mol. dynamics simulations. Featu ...

2006

Transition of the mushy zone from continuous liquid films to a coherent solid

Michel Rappaz, Stéphane Vernède

While studies of solidification microstructures have focused mainly on the tips of the dendrites, the last stage solidification is equally important from the point of view of defect formation (porosity, hot tearing), mechanical strength build-up and precip ...

2006

Low-dimensional supramolecular architectures at metal surfaces

Sebastian Stepanow

This thesis is concerned with supramolecular architectures assembled at metal surfaces. The investigations pursued two objectives. On the one hand, the focus was placed on the fabrication of low-dimensional surface-supported network structures by applying ...

EPFL2005

Structure of nitrile-functionalized alkyltrifluoroborate salts

Paul Joseph Dyson, Zhaofu Fei, Dongbin Zhao

Two nitrile-functionalized alkyltriflouroborate anion based complexes [(Ph3P)(2)N][CH3CH(BF3)CH2CN] and [K(18-crown-6)][CH3CH(BF3)CH2CN] were synthesized and characterized by spectroscopic methods and single X-ray diffraction analysis. In the former comple ...

2005

Mechanism of the hydrogen/platinum(111) fuel cell

Nicola Marzari, Roberto Car

We discuss our recently proposed mechanism for the electro-oxidation/reduction on Pt(111) surfaces (J. Electroanal. Chem. 2002, 537, 7) in the presence of sulfuric acid. The bisulfate ion has a large dipole moment and is strongly adsorbed on the positive e ...

2004

Pure imagery hemi-neglect of far space

Olaf Blanke

Patients with hemispatial neglect restricted to near (within reaching distance) or to far space (beyond reaching distance) have been described. This constitutes a double-dissociation considered by current neurocognitive thinking as compelling evidence for ...

American Academy of Neurology2003

The electroreduction of hydrogen on platinum(111) in acidic media

Nicola Marzari, Roberto Car

We propose a new mechanism for the electroreduction of hydrogen in acidic media. The specific model and theoretical calculations are designed for the Pt(111) surface, because this is the only face that exhibits a clear first order phase transition. The bas ...

2002

Molecular dynamics simulations of MRI-relevant GdIII chelates: direct access to outer-sphere relaxivity

André Merbach, Lothar Helm, Alain Borel

he structure and dynamics of the surrounding water were studied through molecular dynamics (MD) simulations for several GdIII polyaminocarboxylate and polyaminophosphonate complexes in aqueous solution. The radial distribution functions (rdf) show that a f ...

2001