A method for reversible control over nano-roughness of colloidal particles

Ilhan, Beybin; Annink, Carla; Nguyen, David; Mugele, Frieder; Sîretanu, Igor; Duits, Michael H.G.

doi:10.1016/j.colsurfa.2018.09.071

Cited by 18 publications

(17 citation statements)

References 36 publications

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“…However at high concentrations, rough probes can be employed for studying the relation between roughness and diffusion. In the dense regime, particle-particle interactions play an important role in colloidal dynamics 50 , and strong correlations between roughness and jamming have already been found [51][52][53] . In the smooth limit, our probes can be used for shedding more light on the effect of colloidal interactions on rotational diffusion 54,55 or on transient phenomena like glassy dynamics and crystallization.…”

Section: B) Msad Versus Lag Time For Raspberry Systems Rp (Orange/bro...mentioning

confidence: 97%

Spherical probes for simultaneous measurement of rotational and translational diffusion in 3 dimensions

Ilhan

Schoppink

Mugele

et al. 2020

Journal of Colloid and Interface Science

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Section: B) Msad Versus Lag Time For Raspberry Systems Rp (Orange/bro...mentioning

confidence: 97%

Spherical probes for simultaneous measurement of rotational and translational diffusion in 3 dimensions

Ilhan

Schoppink

Mugele

et al. 2020

Journal of Colloid and Interface Science

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“…As our conductivity measurements show, the amount of dissolved CO 2 is greatly reduced upon deionization over extended times. Under de-gassed conditions a change of the surface structure has been observed which increases the surface roughness [37]. From investigations of "hairy surface" particles it is further known, that surface roughness may considerably reduce the electro-kinetic mobility [79].…”

Section: Discussionmentioning

confidence: 99%

“…This shows that an additional source of CO 2 must be present. We attribute it to CO 2 stored by adsorption onto the particle surface [37]. To ensure well deionized conditions during the experiments, we therefore isolate the cells after circulating the suspensions a few minutes at constant minimal conductivity.…”

Section: Samples and Sample Conditioningmentioning

confidence: 99%

Non-monotonic concentration dependence of the electro-phoretic mobility of charged spheres in realistic salt free suspensions

Botin

Carrique

Ruiz-Reina

et al. 2020

The Journal of Chemical Physics

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We considerably extended the accessible range of concentrations for optical investigations of colloidal electro-kinetics using super-heterodyne Doppler velocimetry with multiple scattering correction. We performed measurements of electro-phoretic mobility and DC conductivity of aqueous charged sphere suspensions under realistically salt free conditions covering more than three orders of magnitude in particle number densities, n, and up to transmissions as low as 40%. At low n, the mobility shows an increase with n, then plateaus at intermediate n, and finally decreases at large n. Our study reconciles previous experimental observations made on restricted concentration ranges, and thus demonstrates the existence of a generic density dependence of the electro-phoretic mobility. Comparison to state of the art electro-kinetic theory suggests its relation to a density dependent particle charge.

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“…Surface roughness of the particles was quantified by analyzing AFM height profiles for several raspberries. A spherical fit to the surface was subtracted from the height profile to isolate the roughness profile 18,23 (Fig. 1.b).…”

Section: Synthesis and Characterization Of Raspberriesmentioning

confidence: 99%