Electrostatic self-assembly of silica nanoparticle -: Polyelectrolyte multilayers on polystyrene latex particles
Electrostatic self-assembly of silica nanoparticle -: Polyelectrolyte multilayers on polystyrene latex particles
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DOI：
10.1021/ja9815024
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发表时间：
1998-08-26
影响因子：
15
通讯作者：
Möhwald, H
中科院分区：
文献类型：
--
作者：
Caruso, F;Lichtenfeld, H;Möhwald, H
在以有序、功能超分子结构为主要目标的薄膜制备领域，最近引入的逐层自组装技术已经对薄膜的制备产生了巨大的影响。1 LBL方法允许通过将稀水溶液中的相反带电物种自发地顺序吸附到带电衬底上，在固体载体上制备多层薄膜组件。多层膜沉积的驱动力主要是由于沉积的带电物种之间的静电吸引和络合形成。LBL方法最初被用来构建聚电解质的多层膜，1，随后扩展到包括蛋白质、2个核酸、3个染料、4个树状大分子、5和各种无机纳米粒子6在聚电解质多层组装中，通过用类似的带电物种取代其中一个多离子。绝大多数关于LBL技术的研究都使用宏观上平坦的带电表面作为多层膜形成的衬底。最近，Keller等人提出了一个新的观点。报道了在(3-氨丙基)三乙氧基硅烷修饰的二氧化硅颗粒上制备剥离的磷酸锆片和带电氧化还原聚合物交替复合多层膜的方法。在最近的研究中，8成功地应用LBL方法利用亚微米和微米尺寸的带电胶体颗粒作为吸附衬底来制备胶体支撑的聚电解质多层膜：在胶体上观察到规则的阶梯式聚电解质多层生长。在随后的
The area of thin film fabrication, in which ordered, functional supramolecular structures are the chief goal, has been greatly impacted by the recent introduction of the layer-by-layer (LbL) self-assembly technique. 1 The LbL method permits the fabrication of multilayer thin film assemblies on solid supports by the spontaneous sequential adsorption of oppositely charged species from dilute aqueous solutions onto charged substrates. The driving force for the multilayer film buildup is primarily due to the electrostatic attraction and complex formation between the charged species deposited. The LbL approach was initially employed to construct multilayer films of polyelectrolytes, 1 and subsequently extended to include proteins, 2 nucleic acids, 3 dyes, 4 dendrimers, 5 and various inorganic nanoparticles6 in polyelectrolyte multilayer assemblies by replacing one of the polyions by a similarly charged species.The vast majority of studies concerning the LbL technique have employed macroscopically flat charged surfaces as substrates for multilayer film formation. Recently, Keller et al. reported the preparation of alternating composite multilayers of exfoliated zirconium phosphate sheets and charged redox polymers on (3-aminopropyl) triethoxysilane-modified silica particles. 7 In more recent studies, 8 the LbL approach was successfully applied to utilize submicrometer-and micrometer-sized, charged colloidal particles as the adsorbing substrates to produce colloid-supported polyelectrolyte multilayer films: regular stepwise polyelectrolyte multilayer growth was observed on the colloids. In a subsequent