Temperature-induced changes in polyelectrolyte films at the solid-liquid interface

Analysis of biosurfaces by neutron reflectometry: From simple to complex interfaces

“…Simple systems NR is frequently executed to evaluate film thickness, roughness, packing, and chemical composition, but can also reveal the response of a (multi-)layer to external stimuli such as UV light, 56 shear, 46,57,58 electric fields, [59][60][61] change in temperature, 38,62,63 hydration, 38,64,65 or pH.…”

Temperature Response of PNIPAM Derivatives at Planar Surfaces: Comparison between Polyelectrolyte Multilayers and Adsorbed Microgels

“…Both shrinking and annealing are not reversible upon cooling down to 10 8C. Steitz et al [12] found out that multilayers without any thermosensitive polymer such as (PSS/PAH) n show also an annealing (e.g. conformational changes and interface smoothing) during the course of the applied temperature cycles.…”

“…[11] Steitz et al [12] transferred this method for the first time to polyelectrolyte multilayers containing a large amount of neutral PNIPAM by using a PNIPAM-polyion block copolymer and an oppositely charged polyelectrolyte as building polymers. [13] Then, the same materials were also used to fabricate hollow capsules.…”

“…[12,27,28] 2) The other strategy for the preparation of thermosensitive coatings presented in this Minireview is via adsorption of microgel particles. The advantage of using microgels instead of macrogels is that due to their small size, microgels show a more rapid response to outer stimuli than macrogels, as mentioned above.…”

Responsive Polymerschichten. Schaltbare Oberfläche

“…Obwohl der PNIPAM-Block ungeladen ist, konnten stabile Multischichten gewonnen werden. Diese zeigen bei Temperaturerhöhung zwar eine leichte Dickenabnahme, die jedoch irreversibel ist [10]. Durch den Einbau in die Polyelektrolyt-Multischicht geht das thermoresponsive Verhalten von PNIPAM also verloren.…”