The pair interaction potentials of polymer-grafted silica nanoparticles (NPs) at liquid surfaces were determined by scanning electron microscopy, exploiting the nonvolatility of ionic liquids to stabilize the specimens against microscope vacuum. Even at near contact, individual, two-dimensionally well-dispersed NPs were resolved. The potential of m...
The molecular structures of ionic liquids at interfaces play a crucial role in determining their chemical activities in applications. In situ X-ray photoelectron spectroscopy (XPS) was used to track the evolution of X-ray irradiation-induced chemical reactions in a series of ionic liquids ([C(n)mim][AuCl4]; n=4, 6, 8, 10) on the Si (111) single-cry...
Published in ACS nano
Graphene is regarded as the toughest two-dimensional material (highest in-plane elastic properties) and, as a consequence, it has been employed/proposed as an ultrathin membrane in a myriad of microfluidic devices. Yet, an experimental investigation of eventual variations on the apparent elastic properties of a suspended graphene membrane in contac...
Computational studies of liquid interfaces were performed to address a series of open questions across several distinct systems. Binary solvent mixtures of methanol and acetonitrile at the hydroxylated silica interface demonstrate that methanol, each molecule able to form two distinct hydrogen bonds with the silica surface, is energetically favored...
Published in Mechanics & Industry
CEA-LITEN develops an original process called Boostream® to manipulate, assemble and connect micro- or nanoparticles of various materials, sizes, shapes and functions to obtain monolayer colloidal crystals (MCCs). This process uses the upper surface of a liquid film flowing down a ramp to assemble particles in a manner that is close to the horizont...
CEA-LITEN is developing an original process called Boostream to manipulate, assemble and connect micro- or nano-particles of various origins, sizes, shapes and functions [1]. This process uses the upper surface of a liquid film flowing down a ramp to assemble particles in a manner that is close to the horizontal situation of a Langmuir -Blodgett fi...
Published in Archives of Foundry Engineering
Directional solidification of the Fe - 4,3 wt % C alloy was performed with the pulling rate equal to v=83 μm/s. Sample was frozen during solidification to reveal the shape of the solid/liquid interface. Structures eutectic pyramid and spherolitic eutectic were observed. The solidification front of ledeburite eutectic was revealed. The leading phase...
We derive the trapping energy of a colloidal particle at a liquid interface with contact angle θ and principal curvatures c1 and c2. The boundary conditions at the particle surface are significantly simplified by introducing the shift ε of its vertical position. We discuss the undulating contact line and the curvature-induced lateral forces for a s...
The texture properties and the stability of foam are highly dependent on foam structure after processing. The Weber Number, widely used to predict mean bubble size, takes in account the shearing rate during process, the bulk viscosity, and the surface tension at equilibrium. The objective of this study was to illustrate the importance of surface te...
The rheological properties of the interfaces in complex multiphase systems often play a crucial role in the dynamic behavior of these systems. For example, these properties affect the dynamics of emulsions, of dispersions of vesicles, of biological fluids, or of free surface flows. In the past three to four decades a vast amount of literature has b...
