de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Deformation properties of nonadhesive polyelectrolyte microcapsules studied with the atomic force microscope

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48358

Lulevich,  V. V.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48628

Radtchenko,  I. L.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48921

Vinogradova,  Olga I.
MPI for Polymer Research, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Lulevich, V. V., Radtchenko, I. L., Sukhorukov, G. B., & Vinogradova, O. I. (2003). Deformation properties of nonadhesive polyelectrolyte microcapsules studied with the atomic force microscope. Journal of Physical Chemistry B, 107(12), 2735-2740.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-6248-5
Zusammenfassung
We study the deformation of nonadhesive polyelectrolyte microcapsules under applied load using an atomic force microscope (AFM)-related force measuring device. Both "hollow" (water inside) and "filled" (water-polyanion solution inside) microcapsules are explored. The "filled" capsules were found to be much stiffer than "hollow" ones. The load-deformation profiles always included two regimes, characterized by different behavior. In the first regime, with a low applied load, capsule deformation is elastic and reversible. Above a certain load, capsules deform substantially and partly irreversibly. In this regime, the "hollow" capsules show variability in the reversibility, as well as in load - deformation profiles, which include different sectors (from substantial deformation at quasiconstant load to noisy regions). The "filled" capsules do not reveal such variability and become stiffer when the load is increased. After substantial deformation the "hollow" capsules enter a third region, in which major damage is caused by higher load. We show that the dramatic changes of the capsule's mechanical properties after filling with polyelectrolyte reflect a combined effect of excess osmotic pressure inside them, changes in the shell stiffness, and possibly a formation inside capsules of an electrostatically stabilized 3D net structure.