Adsorption of polyelectrolyte versus surface charge: In situ single-molecule atomic force microscopy experiments on similarly, oppositely, and heterogeneously charged surfaces

Article Abstract:

Atomic force microscopy (AFM) single-molecule experiments are used for studying the effect of the pH and surface charge of mica on the adsorption of the positively charged weak polyelectrolyte (PE) poly(2-vinylpyridine) (P2VP). The increase of polymer concentration has resulted in a complete coverage of the mica substrate and the charge overcompensation by P2VP chains adsorbed on the similarly charged substrate, due to the van der Waals force.

Usage, Atomic force microscopy

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Polyelectrolyte-modified inverse microemulsions and their use as templates for the formation of magnetite nanoparticles

Article Abstract:

The characterization of polyelectrolyte-modified inverse microemulsions and their use as templates for the synthesis of magnetite nanoparticles is presented. It is shown that the cationic polyelectrolyte poly(diallyldimethylammonium chloride) (PDADMAC) of low molar mass can be included into the individual inverse microemulsion droplets (L2 phase) consisting of heptanol, water and an amphoteric surfactant with a sulfobetaine head group.

Electric properties, Magnetite, Chemical properties

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