Publications de Peter Spijker | EPFL Graph Search

Water-induced correlation between single ions imaged at the solid-liquid interface

Peter Spijker, Kislon Voitchovsky, Maria Ricci

When immersed into water, most solids develop a surface charge, which is neutralized by an accumulation of dissolved counterions at the interface. Although the density distribution of counterions perpendicular to the interface obeys well-established theori ...

Nature Publishing Group2014

Relations between roughness, temperature and dry sliding friction at the atomic scale

Jean-François Molinari, Guillaume Anciaux, Peter Spijker

We investigate the friction of deformable bodies, with nano-scale self-affine fractal rough surfaces, at the atomic scale using molecular dynamics. Different temperatures (0-400 K) are studied, while roughness and applied load are changed. During sliding, ...

Elsevier Sci Ltd2013

Direct Visualization of Single Ions in the Stern Layer of Calcite

Jean-François Molinari, Peter Spijker, Francesco Stellacci, Kislon Voitchovsky, Maria Ricci

Calcite is among the most abundant minerals on earth and plays a central role in many environmental and geochemical processes. Here we used amplitude modulation atomic force microscopy (AFM) operated in a particular regime to visualize single ions close to ...

American Chemical Society2013

On the Propagation of Slip Fronts at Frictional Interfaces

David Simon Kammer, Jean-François Molinari, Peter Spijker, Vladislav Yastrebov

The dynamic initiation of sliding at planar interfaces between deformable and rigid solids is studied with particular focus on the speed of the slip front. Recent experimental results showed a close relation between this speed and the local ratio of shear ...

Springer US2012

The effect of loading on surface roughness at the atomistic level

Jean-François Molinari, Guillaume Anciaux, Peter Spijker

One of the key points to better understand the origins of friction is to know how two surfaces in contact adhere to one another. In this paper we present molecular dynamics (MD) simulations of two aluminium bodies in contact, exposed to a range of normal l ...

Springer-Verlag2012

Dry sliding contact between rough surfaces at the atomistic scale

Jean-François Molinari, Guillaume Anciaux, Peter Spijker

Although, a lot is known about the factors contributing to friction, a complete physical understanding of the origins of friction is still lacking. At the macroscale several laws have long since described the relation between load (Amontons, Coulomb), appa ...

Springer US2011

Computation of accommodation coefficients and the use of velocity correlation profiles in molecular dynamics simulations

Peter Spijker

For understanding the behavior of a gas close to a channel wall it is important to model the gas-wall interactions as detailed as possible. When using molecular dynamics simulations these interactions can be modeled explicitly, but the computations are tim ...

2010