Direct Measurement of Depletion and Structural Forces in Polydisperse, Charged Systems

Effect of adding anionic surfactant on the stability of Pickering emulsions

“…Where there is a large disparity in size, the heteroaggregates consist of the large particles surrounded by a shell of the small particles [37,38] and bridging flocculation of the large particles may occur [32,33,39,40]. Small particles may be excluded from regions in between larger particles (at close separations) and induce flocculation through attractive depletion interactions [20][21][22][23][24][25][41][42][43][44]. Highly charged nanoparticles may segregate to regions near uncharged microparticles, forming halos which stabilise the microparticles [45].…”

New vistas in dispersion science and engineering

“…Piech and Walz (2002) have performed calculations of the force of interaction between macrosurfaces immersed in a suspension of charged colloidal particles using an electrostatic repulsive potential. They found that the OSF calculated compared well with direct measurement of the force between the macrosurfaces.…”

Depletion interaction mediated by polydisperse rods

“…Piech et al found semi quantitative agreement between theoretical predictions and their atomic force microcopy measurements of the depletion potential between a spherical silica particle and a silica flat mediated by an ensemble of polydisperse nanospheres [20]. Kleshchanok et al measured interaction profiles between a colloidal sphere and a wall caused by polydisperse macromolecules with TIRM [21].…”