Step-by-Step Assembly of Self-Patterning Polyelectrolyte Films Violating (Almost) All Rules of Layer-by-Layer Deposition

被引:67
作者
Cini, Nejla [1 ,2 ]
Tulun, Tuelay [1 ]
Decher, Gero [2 ,3 ,4 ]
Ball, Vincent [5 ,6 ]
机构
[1] Tech Univ Istanbul, Dept Chem, Fac Sci & Letters, TR-34469 Istanbul, Turkey
[2] CNRS, Inst Charles Sadron, F-67034 Strasbourg, France
[3] Univ Strasbourg, Fac Chim, F-67008 Strasbourg, France
[4] Int Ctr Frontier Res Chem, F-67083 Strasbourg, France
[5] INSERM, UMR 977, F-67085 Strasbourg, France
[6] Univ Strasbourg, Fac Chirurg Dentaire, F-67000 Strasbourg, France
关键词
CHARGED POLYELECTROLYTES; MULTILAYER FILMS; BUILDUP; MECHANISM; REGIME; GROWTH; ACID;
D O I
10.1021/ja102611q
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Because of its versatility, the layer-by-layer (LBL) assembly method has become a popular tool for preparing multimaterial films, yet astonishingly little is known about the fundamental rules governing their deposition. Here we show an unusual case of self-patterning LBL films made from poly(allylamine hydrochloride) and poly(sodium phosphate). In such films, both the film thickness and the film roughness increase linearly with the number of deposition steps up to a thickness of similar to 60 nm. Even more surprising is the fact that the adsorption of individual "layers" of polyanions and polycations proceeds without a regular inversion of the potential and with the occurrence of a growth instability at similar to 75 layers. These findings underline the need to reconsider the fundamentals of polyelectrolyte multilayer film deposition.
引用
收藏
页码:8264 / +
页数:4
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