Publications by Michal Borkovec

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The persistence length of adsorbed dendronized polymers

Giovanni Dietler, Michal Borkovec, Plinio Maroni, Andrey Mikhaylov

The persistence length of cationic dendronized polymers adsorbed onto oppositely charged substrates was studied by atomic force microscopy (AFM) and quantitative image analysis. One can find that a decrease in the ionic strength leads to an increase of the ...

Royal Society of Chemistry2016

Effective Charge of Adsorbed Poly(amidoamine) Dendrimers from Direct Force Measurements

Ramon Pericet Camara, Michal Borkovec

Interaction forces between silica surfaces with adsorbed poly (amidoamine) (PAMAM) dendrimers were measured with the colloidal probe technique based on the atomic force microscope (AFM). At small separations, attractive non-DLVO forces are observed. These ...

American Chemical Society2009

Nano-patterning of solid substrates by adsorbed dendrimers

Ramon Pericet Camara, Michal Borkovec

Weakly charged solid substrates can be nano-patterned in liquid-like order with large and well-defined spacing by adsorbing poly(amido amine) (PAMAM) dendrimers; highly charged substrates lead to lower spacing due to electrostatic three-body attractions be ...

Royal Society of Chemistry2007

Interaction forces and molecular adhesion between pre-adsorbed poly(ethylene imine) layers

Ramon Pericet Camara, Michal Borkovec

Interaction forces between pre-adsorbed layers of branched poly(ethylene imine) (PEI) of different molecular mass were studied with the colloidal probe technique, which is based on atomic force microscopy (AFM). During approach, the long-ranged forces betw ...

Elsevier2006

Probing the validity of the Derjaguin approximation for heterogeneous colloidal particles

Ramon Pericet Camara, Michal Borkovec

The Derjaguin approximation states that the interaction force between two curved surfaces is proportional to their effective radius, whereby the inverse effective radius is the arithmetic mean of the inverse curvature radii of the surfaces involved. The pr ...

Royal Society of Chemistry2006

Aggregation and Charging of Colloidal Silica Particles: Effect of Particle Size

Paul Bowen, Michal Borkovec, Frédéric Juillerat

We studied systematically aqueous suspensions of amorphous well-characterized silica particles by potentiometric titration, electrophoretic mobility, and time-resolved light scattering. Their charging behavior and aggregation rate constants were measured a ...

2005

Atomic force microscopy study of the adsorption and electrostatic self-organization of poly(amidoamine) dendrimers on mica

Ramon Pericet Camara, Michal Borkovec

The adsorption behavior of poly(amidoamine) dendrimers to mica surfaces was investigated as a function of ionic strength and pH. The conformation and lateral distribution of the adsorbed dendrimers of generations G8 and G10 were obtained ex situ by tapping ...

American Chemical Society2004