Adsorption of heterogeneously charged nanoparticles on a variably charged surface by the extended surface complexation approach: charge regulation, chemical heterogeneity, and surface complexation

Article Abstract:

The theoretical studies of adsorption of heterogeneously charged nanoparticles and the surface and the surface complexation between the particle functional groups are described. The findings reveal that the pH and salt dependence of the nanoparticles adsorption is influenced by the balance between an energy gain resulting from the particle and surface charge regulation and the surface complexation and an energy loss from the unfavorable interparticle electrostatic repulsion close to the surface.

Adsorption, Hydrogen-ion concentration, Properties, pH measurement, Structure, Nanoparticles

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Single biomolecule imaging with frequency and force modulation in tapping-mode atomic force microscopy

Article Abstract:

The concept of intermittent-contact-mode frequency and force modulation atomic force microscopy (FFM-AFM) is used to measure the cross-sectional scan of a single bacteriorhodopsin molecule within atomistic and classical simulations. The analysis has shown that its cross-section can be measured without any damage, in contrast to conventional tapping-mode AFM.

Science & research, Research, Usage, Atomic force microscopy, Biomolecules, Frequency modulation, Report

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