Adsorption of Spherical Polyelectrolyte Brushes: from Interactions to Surface Patterning
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Christoph Hanske
Abstract
Adsorption of colloidal particles constitutes an attractive route to tailor the properties of surfaces. However, for efficient material design full control over the particle-substrate interactions is required. We investigate the interaction of spherical polyelectrolyte brushes (SPB) with charged substrates based on adsorption studies and atomic force spectroscopy. The brush layer grafted from the colloidal particles allows a precise adjustment of their adsorption behavior by varying the concentration of added salt. We find a pronounced selectivity between oppositely and like-charged surfaces for ionic strengths up to 10 mM. Near the transition from the osmotic to the salted brush regime at approximately 100 mM attractive secondary interactions become dominant. In this regime SPB adsorb even to like-charged surfaces. To determine the adhesion energy of SPB on charged surfaces directly, we synthesize micrometer-sized SPB. These particles are used in colloidal probe AFM studies. Measurements on oppositely charged surfaces show high forces of adhesion for low ionic strengths that can be attributed to an entropy gain by counterion release. Transferring our observations to charge patterned substrates, we are able to direct the deposition of SPB into two-dimensional arrays. Considering that numerous chemical modifications have been reported for SPB, our studies could open exiting avenues for the production of functional materials with a hierarchical internal organization.
© by Oldenbourg Wissenschaftsverlag, München, Germany
Articles in the same Issue
- Preface — An energetic life between soft matter and hard X-rays
- Optimizing the Sensitivity of FT-Rheology to Quantify and Differentiate for the First Time the Nonlinear Mechanical Response of Dispersed Beer Foams of Light and Dark Beer
- Adsorption of Spherical Polyelectrolyte Brushes: from Interactions to Surface Patterning
- Complexation of charged colloids with polyelectrolyte stars
- Charging and Aggregation of Positively Charged Colloidal Latex Particles in Presence of Multivalent Polycarboxylate Anions
- Spherical Polyelectrolyte Brushes on Colloidal Poly(butadiene) Particles
- Repulsive Forces between Spherical Polyelectrolyte Brushes in Salt-Free Solution
- Structure-Property Relations of Liquid Crystalline Gels with ABA-Triblock Copolymers as Gelators
- Direct-Imaging Cryo-SEM of Nanostructure Evolution in Didodecyldimethylammonium Bromide-Based Microemulsions
- Solubilisation of Oils of Different Polarity in Aqueous Solutions of Pluronic Triblock Copolymers
- Double Responsive Hydrogels based on Tertiary Amine Methacrylate Star Block Copolymers
- Coarse-Graining of Ionic Microgels: Theory and Experiment
- Non NIPAM Based Smart Microgels: Systematic Variation of the Volume Phase Transition Temperature by Copolymerization
- Temperature Controlled Activity of Lipase B from Candida Antarctica after Immobilization within p-NIPAM Microgel Particles
- Synthesis of PEG-Stabilized Fluoro-Acrylate Particles and Study of their Glass Transition in Aqueous Dispersion
- Probability Densities of a Forced Probe Particle in Glass: Results from Mode Coupling Theory and Simulations of Active Microrheology
- Molecular Order and Dynamics of Tris(2-ethylhexyl)phosphate Confined in Uni-Directional Nanopores
- The Structure of Fluids with Impurities
- Packing of Cylindrical Keggin-Type Polyoxometalate Hybrid Micelles as a Function of Aspect Ratio
- Au-TiO2 Yolk-Shell Particles for Photocatalysis Application
- Formfactors of Hollow and Massive Rectangular Parallelepipeds at Variable Degree of Anisometry
Articles in the same Issue
- Preface — An energetic life between soft matter and hard X-rays
- Optimizing the Sensitivity of FT-Rheology to Quantify and Differentiate for the First Time the Nonlinear Mechanical Response of Dispersed Beer Foams of Light and Dark Beer
- Adsorption of Spherical Polyelectrolyte Brushes: from Interactions to Surface Patterning
- Complexation of charged colloids with polyelectrolyte stars
- Charging and Aggregation of Positively Charged Colloidal Latex Particles in Presence of Multivalent Polycarboxylate Anions
- Spherical Polyelectrolyte Brushes on Colloidal Poly(butadiene) Particles
- Repulsive Forces between Spherical Polyelectrolyte Brushes in Salt-Free Solution
- Structure-Property Relations of Liquid Crystalline Gels with ABA-Triblock Copolymers as Gelators
- Direct-Imaging Cryo-SEM of Nanostructure Evolution in Didodecyldimethylammonium Bromide-Based Microemulsions
- Solubilisation of Oils of Different Polarity in Aqueous Solutions of Pluronic Triblock Copolymers
- Double Responsive Hydrogels based on Tertiary Amine Methacrylate Star Block Copolymers
- Coarse-Graining of Ionic Microgels: Theory and Experiment
- Non NIPAM Based Smart Microgels: Systematic Variation of the Volume Phase Transition Temperature by Copolymerization
- Temperature Controlled Activity of Lipase B from Candida Antarctica after Immobilization within p-NIPAM Microgel Particles
- Synthesis of PEG-Stabilized Fluoro-Acrylate Particles and Study of their Glass Transition in Aqueous Dispersion
- Probability Densities of a Forced Probe Particle in Glass: Results from Mode Coupling Theory and Simulations of Active Microrheology
- Molecular Order and Dynamics of Tris(2-ethylhexyl)phosphate Confined in Uni-Directional Nanopores
- The Structure of Fluids with Impurities
- Packing of Cylindrical Keggin-Type Polyoxometalate Hybrid Micelles as a Function of Aspect Ratio
- Au-TiO2 Yolk-Shell Particles for Photocatalysis Application
- Formfactors of Hollow and Massive Rectangular Parallelepipeds at Variable Degree of Anisometry
