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- Mareen Müller, Matthias Karg, Andrea Fortini, Thomas Hellweg, Andreas Fery
- Nanoscale
- 2012

This article addresses wrinkle assisted assembly of core-shell particles with hard cores and soft poly-(N-isopropylacrylamide) shells. As core materials we chose silica as well as silver nanoparticles. The assembled structures show that the soft shells act as a separator between the inorganic cores. Anisotropic alignment is found on two length scales,… (More)

- Andrea Fortini, Matthias Schmidt, Marjolein Dijkstra
- Physical review. E, Statistical, nonlinear, and…
- 2006

Using Gibbs ensemble Monte Carlo simulations and density functional theory we investigate the fluid-fluid demixing transition in inhomogeneous colloid-polymer mixtures confined between two parallel plates with separation distances between one and ten colloid diameters covering the complete range from quasi-two-dimensional to bulklike behavior. We use the… (More)

- Philip Krinninger, Andrea Fortini, Matthias Schmidt
- Physical review. E
- 2016

We investigate a model for colloidal network formation using Brownian dynamics computer simulations. Hysteretic springs establish transient bonds between particles with repulsive cores. If a bonded pair of particles is separated by a cutoff distance, the spring vanishes and reappears only if the two particles contact each other. We present results for the… (More)

- Andrea Fortini, Ignacio Martín-Fabiani, +6 authors Richard P Sear
- Physical review letters
- 2016

In simulations and experiments, we study the drying of films containing mixtures of large and small colloidal particles in water. During drying, the mixture stratifies into a layer of the larger particles at the bottom with a layer of the smaller particles on top. We developed a model to show that a gradient in osmotic pressure, which develops dynamically… (More)

- Andrea Fortini, Richard P Sear
- Langmuir : the ACS journal of surfaces and…
- 2017

We investigate the drying process of three-component and polydisperse colloidal suspensions using Brownian dynamics simulations. We have previously reported (Phys. Rev. Lett. 2016, 116, 118301) on the drying of binary mixtures. For binary mixtures, we found that a gradient of colloidal osmotic pressure develops during drying and that this leads to the final… (More)

- Ignacio Martín-Fabiani, Andrea Fortini, +7 authors Joseph L Keddie
- ACS applied materials & interfaces
- 2016

Stratified coatings are used to provide properties at a surface, such as hardness or refractive index, which are different from underlying layers. Although time-savings are offered by self-assembly approaches, there have been no methods yet reported to offer stratification on demand. Here, we demonstrate a strategy to create self-assembled stratified… (More)

- Andrea Fortini, Eduardo Sanz, Marjolein Dijkstra
- Physical review. E, Statistical, nonlinear, and…
- 2008

We systematically study the relationship between equilibrium and nonequilibrium phase diagrams of a system of short-ranged attractive colloids. Using Monte Carlo and Brownian dynamics simulations we find a window of enhanced crystallization that is limited at high interaction strength by a slowing down of the dynamics and at low interaction strength by the… (More)

- Marjolein Dijkstra, René van Roij, Roland Roth, Andrea Fortini
- Physical review. E, Statistical, nonlinear, and…
- 2006

We study a model suspension of sterically stabilized colloidal particles and nonadsorbing ideal polymer coils, both in bulk and adsorbed against a planar hard wall. By integrating out the degrees of freedom of the polymer coils, we derive a formal expression for the effective one-component Hamiltonian of the colloids. We employ an efficient Monte Carlo… (More)

- Andrea Fortini, Marjolein Dijkstra
- Journal of physics. Condensed matter : an…
- 2006

We study the phase behaviour of hard spheres confined between two parallel hard plates using extensive computer simulations. We determine the full equilibrium phase diagram for arbitrary densities and plate separations from one to five hard-sphere diameters using free energy calculations. We find a first-order fluid-solid transition, which corresponds to… (More)

- Alexandra Schweikart, Andrea Fortini, Alexander Wittemann, Matthias Schmidt, Andreas Ferya
- 2012

We created hierarchically ordered structures of nanoparticles on smooth plan ar hydrophilic substrates by drying colloidal dispersions in confinement under macroscopic stamps with microscopically wrinkled surfaces. Experiments were carried out with model nanoparticle suspensions that possess high colloidal stability and monodispersity. The structures ranged… (More)