From exponential to linear growth in polyelectrolyte multilayers

Langmuir : the ACS Journal of Surfaces and Colloids
C H PorcelPierre Schaaf

Abstract

There exist two types of polyelectrolyte multilayers: those whose thickness increases linearly with the number of deposition steps, which are nicely structured, and those whose thickness increases exponentially, which resembles hydrogels. This simple picture has recently slightly evolved with the finding that some exponentially growing films enter into a linear growth phase after a certain number of deposition steps. In this study, we investigate the buildup process of hyaluronic acid/poly(L-lysine) (HA/PLL) multilayers that constitute one of the best known exponentially growing systems. The films are built by using two deposition methods: the well-known dipping method and the more recent spraying method where the polyelectrolyte solutions are sprayed alternately onto a vertical substrate. The goal of this study is twofold. First, we investigate the influence of the main parameters (i.e., spraying rate and spraying time) of the spraying method on the film growth process. We find that, as for the dipping method, the film thickness first evolves exponentially with the number of deposition steps, and after a given number of deposition steps, it follows a linear evolution. We find that similar behavior is observed with the dipping ...Continue Reading

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Citations

Nov 5, 2011·Biomacromolecules·Chunhong YeVladimir V Tsukruk
Jan 22, 2013·Biomacromolecules·Clara R CorreiaJoão F Mano
May 20, 2011·Journal of the American Chemical Society·Ikjun ChoiVladimir V Tsukruk
Oct 29, 2013·Journal of the American Chemical Society·Graham de RuiterMilko E van der Boom
Nov 3, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Liming WangZhaohui Su
Nov 9, 2006·Physical Chemistry Chemical Physics : PCCP·Regine V Klitzing
May 8, 2010·Physical Chemistry Chemical Physics : PCCP·Cao LiRen-Xi Zhuo
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Apr 8, 2014·Journal of Colloid and Interface Science·Lilianna Szyk-WarszyńskaRobert P Socha
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