Complexation behavior between polyelectrolyte stars and charged colloids
Zusammenfassung der Projektergebnisse
Related to the stated goals of the original proposal, it can be stated that the vast majority of the targets set forth has been achieved. In particular, the formation, shape and characterization of the complex formation has been fully carried out for a variety of geometries, size- and charge ratios and ambient conditions. Overcharging has been investigated and it has been shown that under certain conditions on size ratio and salinity, such complexes are indeed possible. The major achievement from the theory and simulation side is, in our view, the establishment of PES-colloid complexes as self-organized inverse patchy colloids with regular, self-assembled and tunable patches on their surface, as well as the coarse-graining of the same. This aspect goes beyond the original goals of the project and it opens a vast new arena for possible future developments, in which not only the PI but also other groups are currently working on. We emphasize the strong ties between the microscopic model, arising from the techniques and subject of the project, and the coarse-grained model. One aspect of the proposal that has not been investigated pertains to the coagulation kinetics and the associated colloid-PES effective interaction. In all simulations performed and for all charge- and size ratios, the complexation of the PES with the colloid has been rapid and irreversible, without encountering any hindrances from possible (free) energy barriers. In this sense, the determination of an effective potential between the two appeared to be useless and, to a large extent, meaningless. From the experimental side it can be that major goals have been achieved. In particular, the interaction between charged particles was deduced quantitatively from the coagulation kinetics and applied to further systems. The experiments planned for studying the interaction of the star polyelectrolytes with colloids have been performed.
Projektbezogene Publikationen (Auswahl)
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Fluid‐fluid demixing in colloid-polyelectrolyte star mixtures, Journal of Physics: Condensed Matter 19, 076105 (2007)
M. Konieczny and C. N. Likos
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From sea urchins to starfishes: controlling the adsorption of star‐branched polyelectrolytes on charged walls, Soft Matter 3, 1130 (2007)
M. Konieczny and C. N. Likos
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Charge‐induced conformational changes of dendrimers, Macromolecules 41, 4452 (2008)
R. Blaak, S. Lehmann, and C. N. Likos
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Computer simulations of polyelectrolyte stars and brushes, Journal of Physics: Condensed Matter 20, 494221 (2008)
C. N. Likos, R. Blaak, and A. Wynveen
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Micro-surface potential measurements: Repulsive forces between polyelectrolyte brushes in presence of multivalent counterions, Langmuir 24, 10612 (2008)
Ch. Schneider, A. Jusufi, R. Farina, F. Li, P. Pincus, M. Tirrell, M. Ballauff
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Polyelectrolyte-compression forces between spherical DNA brushes, Physical Review Letters 100, 118302 (2008)
K. Kegler, M. Konieczny, G. Dominguez‐Espinosa, C. Gutsche, M. Salomo, F. Kremer, and C. N. Likos
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Adsorption characteristics of amphiphilic dendrimers, Soft Matter 5, 2905 (2009)
D. A. Lenz, R. Blaak, and C. N. Likos
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Colloid‐dendrimer complexation, Soft Matter 5, 4542 (2009)
D. A. Lenz, R. Blaak, and C. N. Likos
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Colloquium: Star-branched polyelectrolytes: The physics of their conformations and interactions, Reviews of Modern Physics 81, 1753 (2009)
A. Jusufi and C. N. Likos
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Stability behavior of anionic spherical polyelectrolyte brushes in the presence of La(III) counterions, Phys. Rev. E 82, 011401 (2010)
C. Schneider, A. Jusufi, R. Farina, P. Pincus, M. Tirrell, M. Ballauff
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Effective interactions between charged dendrimers, Soft Matter 7, 8419 (2011)
S. Huißmann, C. N. Likos, and R. Blaak
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Experimental study of electrostatically stabilized colloidal particles: Colloidal stability and charge reversal, J. Colloid Interf. Sci. 358, 62 (2011)
C. Schneider, M. Hanisch, B. Wedel, A. Jusufi, M. Ballauff
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Inverse patchy colloids: from microscopic description to macroscopic coarse-graining, Soft Matter 7, 8313 (2011)
E. Bianchi, G. Kahl and C. N. Likos
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Quantifying the Reversible Association of Thermosensitive Nanoparticles, Phys. Rev. Lett. 107, 168303 (2011)
A. Zaccone, J. J. Crassous, B. Beri, M. Ballauff
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Complexation and overcharging of polyelectrolyte stars and charged colloids, Journal of Physics: Condensed Matter 24, 322101 (2012)
R. Blaak and C. N. Likos
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Complexation of charged colloids with polyelectrolyte stars, Zeitschrift für Physikalische Chemie 226, 711 (2012)
A. Jusufi, M. Konieczny, and C. N. Likos
