Robert Botet
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View article: Vesicular dust particles – light scattering and radiation pressure
Vesicular dust particles – light scattering and radiation pressure Open
We present a new model for irregular vesicular particles, featuring both open and closed porosity. The model can simulate particles with large vesicles, comparable in size to the wavelength of light. Calculations of light polarization indi…
View article: Chasing fractals: The forgotten conundrum of colloidal aggregates
Chasing fractals: The forgotten conundrum of colloidal aggregates Open
International audience
View article: The importance of the local structure of fractal aggregates
The importance of the local structure of fractal aggregates Open
The pair correlation function, g ( r ), is a fundamental descriptor of the inner structure of fractal aggregates of monomers. It provides a natural tool for studying physical properties involving two-point interaction (e.g. optics of aggre…
View article: Dendritic growth of protein gel in the course of sweat pore plugging by aluminium salts under physiological conditions
Dendritic growth of protein gel in the course of sweat pore plugging by aluminium salts under physiological conditions Open
Confocal microscopy + numerical simulations reveal the mechanisms involved in the formation of a dendritic plug appearing in sweat flowing across a microfluidic channel in the presence of aluminium salts.
View article: Percus–Yevick structure factors made simple
Percus–Yevick structure factors made simple Open
Measuring the structure factor, S ( q ), of a dispersion of particles by small-angle X-ray scattering provides a unique method to investigate the spatial arrangement of colloidal particles. However, it is impossible to find the exact locat…
View article: Apollonian emulsions
Apollonian emulsions Open
We have discovered the existence of extremely polydisperse High\nInternal-Phase-Ratio Emulsions (HIPE) in which the internal-phase droplets,\npresent at 95% volume fraction, remain spherical and organize themselves in the\navailable space …
View article: Packing Polydisperse Colloids into Crystals: When Charge-Dispersity Matters
Packing Polydisperse Colloids into Crystals: When Charge-Dispersity Matters Open
Monte Carlo simulations, fully constrained by experimental parameters, are found to agree well with a measured phase diagram of aqueous dispersions of nanoparticles with a moderate size polydispersity over a broad range of salt concentrati…
View article: Apollonian Packing in Polydisperse Emulsions
Apollonian Packing in Polydisperse Emulsions Open
We have discovered the existence of polydisperse High Internal-Phase-Ratio Emulsions (HIPE) in which the internal-phase droplets, present at 95% volume fraction, remain spherical and organize themselves in the available space according to …
View article: Photometry and colour index of Comet 67P/Churyumov-Gerasimenko on 2015 December 12
Photometry and colour index of Comet 67P/Churyumov-Gerasimenko on 2015 December 12 Open
International audience
View article: The duality between a non-Hermitian two-state quantum system and a massless charged particle
The duality between a non-Hermitian two-state quantum system and a massless charged particle Open
International audience
View article: Shape effects and size distributions of astrophysical dust particles
Shape effects and size distributions of astrophysical dust particles Open
International audience
View article: Hiding in Plain View: Colloidal Self-Assembly from Polydisperse Populations
Hiding in Plain View: Colloidal Self-Assembly from Polydisperse Populations Open
We report small-angle x-ray scattering experiments on aqueous dispersions of colloidal silica with a broad monomodal size distribution (polydispersity, 14%; size, 8 nm). Over a range of volume fractions, the silica particles segregate to b…