About: Collective diffusion coefficient of a charged colloidal dispersion: interferometric measurements in a drying drop

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Collective diffusion coefficient of a charged colloidal dispersion: interferometric measurements in a drying drop
Creator	Bouchaudy, Anne Dehaeck, Sam Salmon, Jean-Baptiste Sobac, Benjamin
Source	ArXiv; Medline
abstract	In the present work, we use Mach-Zehnder interferometry to thoroughly investigate the drying dynamics of a 2D confined drop of a charged colloidal dispersion. This technique makes it possible to measure the colloid concentration field during the drying of the drop at a high accuracy (about 0.5%) and with a high temporal and spatial resolution (about 1 frame/s and 5 $/mu$m/pixel). These features allow us to probe mass transport of the charged dispersion in this out-of-equilibrium situation. In particular, our experiments provide the evidence that mass transport within the drop can be described by a purely diffusive process for some range of parameters for which the buoyancy-driven convection is negligible. We are then able to extract from these experiments the collective diffusion coefficient of the dispersion $D(/varphi)$ over a wide concentration range $/varphi=0.24$-$0.5$, i.e. from the liquid dispersed state to the solid glass regime, with a high accuracy. The measured values of $D(/varphi)/simeq 5$-$12 D_0$ are significantly larger than the simple estimate $D_0$ given by the Stokes-Einstein relation, thus highlighting the important role played by the colloidal interactions in such dispersions.
has issue date	2020-08-10(xsd:dateTime)
bibo:doi	10.1039/d0sm00860e
bibo:pmid	32797140
has license	arxiv
sha1sum (hex)	d82559c679db6e652ea76f5196bcd0ae40286bc6
schema:url	https://doi.org/10.1039/d0sm00860e
resource representing a document's title	Collective diffusion coefficient of a charged colloidal dispersion: interferometric measurements in a drying drop
has PubMed identifier	32797140
schema:publication	Soft matter
resource representing a document's body	covid:d82559c679db6e652ea76f5196bcd0ae40286bc6#body_text
is schema:about of	named entity 'drying' named entity 'highlighting' named entity 'pixel' named entity 'temporal' named entity 'DYNAMICS' named entity 'DISPERSED STATE' named entity 'DISPERSION' named entity 'DIFFUSION COEFFICIENT' named entity 'MEASURED' named entity 'PLAYED' named entity '0.5' named entity 'CHARGED' covid:arg/d82559c679db6e652ea76f5196bcd0ae40286bc6 named entity 'colloidal dispersion' named entity 'experiments' named entity 'features' named entity 'These' named entity 'Stokes-Einstein relation' named entity 'measured' named entity 'drop' named entity 'diffusive' named entity 'colloidal dispersion' named entity 'colloidal interactions' named entity 'buoyancy' named entity 'frame/s' named entity 'dispersion' named entity 'convection' named entity 'diffusion coefficient' named entity 'pixel' named entity 'Collective diffusion' named entity 'interferometric measurements' named entity 'Mach-Zehnder' named entity 'silica' named entity 'yield stress' named entity 'interferometry' named entity 'analytical solution' named entity 'diffusivity' named entity 'colloid' named entity 'mass transport' named entity 'hydrophobic' named entity 'eqn' named entity 'electrostatic' named entity 'mass fraction' named entity 'boundary layer' named entity 'diffusion coefficient' named entity 'colloidal dispersion' named entity 'mass transport' named entity 'colloidal interactions' named entity 'field of view' named entity 'eqn' named entity 'phase constant' named entity 'eqn' named entity 'optical technique' named entity 'striated cone' named entity 'spray drying' named entity 'non-volatility' named entity 'diffusion coefficient' named entity 'eqn' named entity 'free convection' named entity 'diffusion coefficient' named entity 'free convection' named entity 'diffusivity' named entity 'liquid to solid transition' named entity 'Mach-Zehnder' named entity 'optical technique' named entity 'incompressible' named entity 'interference pattern' named entity 'image acquisition' named entity 'diffuse layer' named entity 'R.H.' named entity 'convection' named entity 'rheometer' named entity 'free convection' named entity 'eqn' named entity 'evaporation' named entity 'nanoparticles' named entity 'buoyancy' named entity 'glass transition' named entity 'ambient conditions'

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