Free-standing membranes via covalent cross-linking of polyelectrolyte multilayers with complementary reactivity

Research output: Contribution to journalResearch articleContributedpeer-review


  • Patrick Ott - , University of Potsdam (Author)
  • Katja Trenkenschuh - , University of Bayreuth (Author)
  • Julia Gensel - , University of Bayreuth (Author)
  • Andreas Fery - , University of Bayreuth (Author)
  • André Laschewsky - , University of Potsdam (Author)


Polyelectrolyte multilayers were prepared by the layer-by-layer (LbL) technique from polyanions bearing aldehyde and polycations with 4-methylpyridinium moieties. The aldol reaction of these complementary reactive groups can be followed by the formation of fluorescent merocyanine dyes, resulting in cross-linked, ultrathin polymer films. The efficient stabilization of the polymer films allows for their intact removal from high surface energy supports, such as glass or surface oxidized silicon wafers, by simple treatment with salt solutions, yielding free-standing membranes. Increasing separation of the reactive polycation and polyanion layers with layers of inert polycation and polyanion analogues only gradually prevents the coupling reaction. From this dependence, polyions assembled in consecutive adsorption layers seem to be able to penetrate into as far as three neighboring layers.


Original languageEnglish
Pages (from-to)18182-18188
Number of pages7
Issue number23
Publication statusPublished - 7 Dec 2010
Externally publishedYes

External IDs

PubMed 21033763