Small angle neutron scattering investigations (SANS) of polyelectrolyte multilayer capsules templated on human red blood cells (Articolo in rivista)

Type
Label
  • Small angle neutron scattering investigations (SANS) of polyelectrolyte multilayer capsules templated on human red blood cells (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Estrela-Lopis, I; Leporatti, S; Typlt, E; Clemens, D; Donath, E (2007)
    Small angle neutron scattering investigations (SANS) of polyelectrolyte multilayer capsules templated on human red blood cells
    in Langmuir
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Estrela-Lopis, I; Leporatti, S; Typlt, E; Clemens, D; Donath, E (literal)
Pagina inizio
  • 7209 (literal)
Pagina fine
  • 7215 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 23 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Leipzig, Inst Med Phys & Biophys, D-04103 Leipzig, Germany; Univ Lecce, Natl Nanotechnol Lab, I-73100 Lecce, Italy; Hahn Meitner Inst Berlin GmbH, Berlin Neutron Scattering Ctr, D-14109 Berlin, Germany (literal)
Titolo
  • Small angle neutron scattering investigations (SANS) of polyelectrolyte multilayer capsules templated on human red blood cells (literal)
Abstract
  • Polyelectrolyte capsules were fabricated by layer-by-layer deposition of poly(styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) on glutardialdehyde fixed human erythrocytes and subsequent core dissolution using NaOCl as an oxidizing agent. SANS together with confocal laser scanning microscopy (CLSM) were applied to study capsule topology and interior as well as the layer thickness as a function of the deposition protocol, layer number, ionic concentration, and temperature treatment. The capsules contained various amounts of trapped polyelectrolyte. Retention depended on the order of polyelectrolyte deposition and layer number, which influenced layer permeability. The capsule wall thickness was found to be much smaller (3-4.5 nm in total) than what was known for polyelectrolyte multilayer walls, where every single layer contributes about 1.8 nm to the total thickness. NaCl (0.1 mM) caused a layer thickness decrease by 16%. Annealing at 70 degrees C induced capsule shrinking together with an increase of the wall thickness by 85% and wall density by 12%. (literal)
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