Metal deposition by electroless plating on polydopamine functionalized micro- and nanoparticles
Metal deposition by electroless plating on polydopamine functionalized micro- and nanoparticles
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DOI：
10.1016/j.jcis.2013.08.028
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发表时间：
2013-12-01
影响因子：
9.9
通讯作者：
Kaskel, Stefan
中科院分区：
文献类型：
--
作者：
Mondin, Giovanni;Wisser, Florian M.;Kaskel, Stefan
报道了一种新的制备金属包覆的微米和纳米颗粒的方法，该方法通过用薄的聚多巴胺层功能化，然后通过化学镀来制备。颗粒最初通过自聚合用聚多巴胺包覆。所得聚多巴胺涂覆的颗粒具有富含儿茶酚和氨基的表面，导致对金属离子的高亲和力。因此，它们为选择性无电金属沉积提供了有效的平台，而无需进一步的活化和敏化步骤。基于聚多巴胺的功能化与化学镀的组合确保了简单、可扩展且具有成本效益的金属涂覆策略。成功地制造了镀银碳化钨微粒、镀铜碳化钨微粒和镀铜氧化铝纳米颗粒，还显示了该方法的高度通用性，因为多巴胺的聚合导致在任何材料和尺寸的颗粒的表面上形成粘附的聚多巴胺层。用该方法生产的金属涂覆的颗粒特别适合于生产金属基质复合材料，因为金属涂层增加了金属对颗粒的润湿性，促进了它们在基质内的整合。这种复合材料用于各种应用中，包括电触点、汽车工业的部件、磁体和电磁干扰屏蔽。(C)2013 Elsevier Inc. All rights reserved.
A novel approach for the fabrication of metal coated micro- and nanoparticles by functionalization with a thin polydopamine layer followed by electroless plating is reported. The particles are initially coated with polydopamine via self-polymerization. The resulting polydopamine coated particles have a surface rich in catechols and amino groups, resulting in a high affinity toward metal ions. Thus, they provide an effective platform for selective electroless metal deposition without further activation and sensitization steps. The combination of a polydopamine-based functionalization with electroless plating ensures a simple, scalable, and cost-effective metal coating strategy. Silver-plated tungsten carbide microparticles, copper-plated tungsten carbide microparticles, and copper-plated alumina nanoparticles were successfully fabricated, showing also the high versatility of the method, since the polymerization of dopamine leads to the formation of an adherent polydopamine layer on the surface of particles of any material and size. The metal coated particles produced with this process are particularly well suited for the production of metal matrix composites, since the metal coating increases the wettability of the particles by the metal, promoting their integration within the matrix. Such composite materials are used in a variety of applications including electrical contacts, components for the automotive industries, magnets, and electromagnetic interference shielding. (C) 2013 Elsevier Inc. All rights reserved.