Streaming potential studies of colloid, polyelectrolyte and protein deposition

Deposition of colloid particles on protein layers: Fibrinogen on mica

“…In this theoretic approach, a 3D distribution of charge over Fb molecules is considered, as well as the flow damping effect due to adsorbed molecules [35,36]. It is interesting to note that this model was successfully applied before for interpretation of zeta potential of surfaces covered by colloid particles and polyelectrolytes [28][29][30][31]37,38]. An interesting feature, which was confirmed in these experiments is that the limiting value of the zeta potential of particle-covered surfaces is 0.71 f p (where f p is the bulk zeta potential of the particle or protein molecule) rather than f p as intuitively expected.…”

“…Latex article deposition proceeded over a desired time. The true coverage of particles was determined by a direct optical microscope counting under wet conditions, as described in our previous works [28][29][30][31]. Particles were counted over 10-20 equal sized areas chosen randomly on the mica sheet.…”

Hydrodynamic radii and diffusion coefficients of particle aggregates derived from the bead model

“…Additionally, our results can be used for determining deposition kinetics of macromolecules and bioparticles at various interfaces, which has a major significance in various fields of science and many industrial processes [42,43].…”

Adsorption monitoring of phospho-l-serine on hydroxyapatite

“…The kinetics of adsorption is very important as the time scale of adsorption is very decisive for materials performance and it may vary depending on molecular properties and on the nature of the adsorbent. Streaming potential (SP) measurements have been suggested as a potentially useful tool to monitor the adsorption from solution [20][21][22][23][24][25][26]. SP in combination with the electrical conductivity measurements allows for the evaluation of ζ-potential taking into account the surface conduction phenomenon, which affects significantly the calculated ζ-potential values [27,28].…”