Analysis of dispersive interactions at polymer/TiAlN interfaces by means of dynamic force spectroscopy

Abstract

Dispersion forces due to polarizable subsurface layers govern TiAlN/polymer interactions and decrease by 50% when oxidizing TiAlN to form TiAlO.

Single-Molecule Desorption Studies of Poly(acrylic acid) at Electrolyte/Oxide/TiAlN Interfaces

“…As previously mentioned, the high unbinding force values recorded for pure TiO 2 and oxidized TiAlN films in comparison to the lower ones measured for Al oxide, Figure , can be explained on the basis of the results recently reported by Wiesing et al According to the authors, the increase in the ratio of Ti/Al observed after complete oxidation of TiAlN substrates is accompanied by an enhancement of the polarizability of the oxide surface and, subsequently, of van der Waals and adhesion forces. , …”

“…In this regard, the authors showed that these adhesive interactions are mostly based on van der Waals forces, their intensity depending on the extension of oxidation of the TiAlN coatings. 12 These studies could not reveal single-molecule adsorption or desorption events based on extended contact regions during the measurements. However, by means of AFM-based single-molecule force spectroscopy (SMFS), it is possible to analyze the adsorption/ desorption cycle of single macromolecules at electrolyte/solid interfaces.…”

“…In this approach, atomic force microscopy (AFM) tips coated with TiAlN (after surface oxidation) thin films were used to unveil the interactions occurring between these hard coatings and polycarbonate substrates. In this regard, the authors showed that these adhesive interactions are mostly based on van der Waals forces, their intensity depending on the extension of oxidation of the TiAlN coatings . These studies could not reveal single-molecule adsorption or desorption events based on extended contact regions during the measurements.…”

“…Wiesing et al probed the adhesive interaction between polycarbonate and surface-cleansed TiAlN by means of dynamic force spectroscopy and colloidal probe measurements . In this approach, atomic force microscopy (AFM) tips coated with TiAlN (after surface oxidation) thin films were used to unveil the interactions occurring between these hard coatings and polycarbonate substrates.…”

“…11 Wiesing et al probed the adhesive interaction between polycarbonate and surface-cleansed TiAlN by means of dynamic force spectroscopy and colloidal probe measurements. 12 In this approach, atomic force microscopy (AFM) tips coated with TiAlN (after surface oxidation) thin films were used to unveil the interactions occurring between these hard coatings and polycarbonate substrates. In this regard, the authors showed that these adhesive interactions are mostly based on van der Waals forces, their intensity depending on the extension of oxidation of the TiAlN coatings.…”