250 citations · 702 across the 19 of their papers we have counts for
23 papers
Near-surface colloidal dynamics in jammed and slipping microgel suspensions
Masoodah Gunny, Frédérick Caetano, Matilde Bureau +4
Jammed suspensions of soft microgel particles may exhibit slippage along smooth boundaries. Owing to their expected sub-micrometric dimensions, direct observations of dynamics with…
Swelling and evaporation determine surface morphology of grafted hydrogel thin films
Caroline Kopecz-Muller, Clémence Gaunand, Yvette Tran +5
We experimentally study the formation of surface patterns in grafted hydrogel films of nanometer-to-micrometer thicknesses during imbibition-driven swelling followed by evaporation…
Mechanical response of a thick poroelastic gel in contactless colloidal-probe rheology
Caroline Kopecz-Muller, Vincent Bertin, Elie Raphael +2
When a rigid object approaches a soft material in a viscous fluid, hydrodynamic stresses arise in the lubricated contact region and deform the soft material. The elastic deformatio…
Nanoparticle Taylor dispersion near charged surfaces with an open boundary
Alexandre Vilquin, Vincent Bertin, Elie Raphaël +3
The dispersive spreading of microscopic particles in shear flows is influenced both by advection and thermal motion. At the nanoscale, interactions between such particles and their…
Near-surface rheology and hydrodynamic boundary condition of semi-dilute polymer solutions
Gabriel Guyard, Alexandre Vilquin, Nicolas Sanson +2
Understanding confined flows of complex fluids requires simultaneous access to the mechanical behaviour of the liquid and the boundary condition at the interfaces. Here, we use eva…
Time dependence of advection-diffusion coupling for nanoparticle ensembles
Alexandre Vilquin, Vincent Bertin, Pierre Soulard +5
Advection-diffusion coupling can enhance particle and solute dispersion by orders of magnitude as compared to pure diffusion, with a steady state being reached for confined flow re…
Interface-Sensitive Raman Microspectroscopy of Water via Confinement with a Multimodal Miniature Surface Forces Apparatus
Hilton B. de Aguiar, Joshua D. McGraw, Stephen H. Donaldson
Modern interfacial science is increasingly multi-disciplinary. Unique insight into interfacial interactions requires new multimodal techniques for interrogating surfaces with simul…
A Multi-Modal Miniature Surface Forces Apparatus (uSFA) for Interfacial Science Measurements
Kai Kristiansen, Stephen H. Donaldson, Zachariah J. Berkson +8
Advances in the research of intermolecular and surface interactions result from the development of new and improved measurement techniques and combinations of existing techniques.…
Influence of outer-layer finite-size effects on the rupture kinetics of a thin polymer film embedded in an immiscible matrix
Mohamed S. Chebil, Joshua D. McGraw, Thomas Salez +2
In capillary-driven fluid dynamics, simple departures from equilibrium offer the chance to quantitatively model the resulting relaxations. These dynamics in turn provide insight on…
Adsorption-Induced Slip Inhibition for Polymer Melts on Ideal Substrates
Mark Ilton, Thomas Salez, Paul D. Fowler +7
Hydrodynamic slip of a liquid at a solid surface represents a fundamental phenomenon in fluid dynamics that governs liquid transport at small scales. For polymeric liquids, de Genn…
Nucleated dewetting in supported ultra-thin liquid films with hydrodynamic slip
Matthias Lessel, Joshua D. McGraw, Oliver Bäumchen +1
This study reveals the influence of the surface energy and solid/liquid boundary condition on the breakup mechanism of dewetting ultra-thin polymer films. Using silane self-assembl…
Effects of slippage on the dewetting of a droplet
Tak Shing Chan, Joshua D. McGraw, Thomas Salez +2
In many macroscopic dynamic wetting problems, it is assumed that the macroscopic interface is quasistatic, and the dissipation appears only in the region close to the contact line.…
Influence of bidisperse self-assembled monolayer structure on the slip boundary condition of thin polymer films
Joshua D. McGraw, Mischa Klos, Antoine Bridet +5
Alkylsilane self-assembled monolayers (SAMs) are often used as model substrates for their ease of preparation and hydrophobic properties. We have observed that these atomically smo…
Controlling Marangoni induced instabilities in spin-cast polymer films: how to prepare uniform films
Paul D. Fowler, Celine Ruscher, Joshua D. McGraw +2
In both research and industrial settings spin coating is extensively used to prepare highly uniform thin polymer films. However, under certain conditions, spin coating results in f…
Slip-Mediated Dewetting of Polymer Microdroplets
Joshua D. McGraw, Tak Shing Chan, Simon Maurer +5
Classical hydrodynamic models predict that infinite work is required to move a three-phase contact line, defined here as the line where a liquid/vapor interface intersects a solid…
Influence of Slip on the Plateau-Rayleigh Instability on a Fibre
Sabrina Haefner, Michael Benzaquen, Oliver Baümchen +6
The Plateau-Rayleigh instability of a liquid column underlies a variety of fascinating phenomena that can be observed in everyday life. In contrast to the case of a free liquid cyl…
A direct quantitative measure of surface mobility in a glassy polymer
Yu Chai, Thomas Salez, Joshua D. McGraw +4
Thin polymer films have striking dynamical properties that differ from their bulk counterparts. With the simple geometry of a stepped polymer film on a substrate, we probe mobility…
Relaxation and Intermediate Asymptotics of a Rectangular Trench in a Viscous Film
Oliver Bäumchen, Michael Benzaquen, Thomas Salez +5
The surface of a thin liquid film with nonconstant curvature flattens as a result of capillary forces. While this leveling is driven by local curvature gradients, the global bounda…
Capillary leveling of stepped films with inhomogeneous molecular mobility
Joshua D. McGraw, Thomas Salez, Oliver Bäumchen +2
A homogeneous thin polymer film with a stepped height profile levels due to the presence of Laplace pressure gradients. Here we report on studies of polymeric samples with precisel…
Capillary-driven flow induced by a stepped perturbation atop a viscous film
Thomas Salez, Joshua D. McGraw, Oliver Bäumchen +2
Thin viscous liquid films driven by capillarity are well described in the lubrication theory through the thin film equation. In this article, we present an analytical solution of t…
Numerical solutions of thin film equations for polymer flows
Thomas Salez, Joshua D. McGraw, Sara L. Cormier +3
We report on the numerical implementation of thin film equations that describe the capillary-driven evolution of viscous films, in two-dimensional configurations. After recalling t…
Beyond Tanner's Law: Crossover between Spreading Regimes of a Viscous Droplet on an Identical Film
Sara L. Cormier, Joshua D. McGraw, Thomas Salez +2
We present results on the leveling of polymer microdroplets on thin films prepared from the same material. In particular, we explore the crossover from a droplet spreading on an in…
Self-Similarity and Energy Dissipation in Stepped Polymer Films
Joshua D. McGraw, Thomas Salez, Oliver Bäumchen +2
The surface of a thin liquid film with nonconstant curvature is unstable, as the Laplace pressure drives a flow mediated by viscosity. We present the results of experiments on one…