Selective Electroless Nickel Plating on Polyelectrolyte Multilayer Platforms
Selective Electroless Nickel Plating on Polyelectrolyte Multilayer Platforms
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DOI：
10.1021/la010755z
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发表时间：
2001-09
期刊：
影响因子：
3.9
通讯作者：
T. Wang;B. Chen;‡. A. M. F. Rubner;R. Cohen
中科院分区：
文献类型：
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作者：
T. Wang;B. Chen;‡. A. M. F. Rubner;R. Cohen
采用聚丙烯酸（PAA）和聚烯丙基胺盐酸盐（PAH）层层吸附法制备了聚电解质多层膜（PEM），并将其用于选择性地吸附钯催化剂进行化学镀镍。取决于多层加工期间使用的pH条件和最后吸附的PAH，PAH/PAA基多层的表面可以被调节为主要含有PAA、主要含有PAH或PAA和PAH官能团的混合物（即，羧酸或胺）。四胺氯化钯（Pd（NH3）4Cl 2）或四氯钯酸钠（Na 2 PdCl 4）的钯络合物离子通过离子交换分别仅与PAA或PAH的表面选择性结合。在PAH pH为7.5和PAA pH为3.5下制造的涂覆有PAA-顶部和PAH-顶部多层的区域的基底仅在PAA区域上结合[Pd（NH3）4]2+。当浸入化学镀镍浴中时，只有被Pd络合物活化的基底的PAA顶部区域促进了化学镀镍。
Polyelectrolyte multilayers (PEMs) fabricated by the layer-by-layer adsorption of poly(acrylic acid) (PAA) and poly(allylamine hydrochloride) (PAH) are used to selectively bind palladium catalysts for electroless nickel plating. Depending on the pH conditions used during multilayer processing and the polyelectrolyte adsorbed last, the surface of the PAH/PAA-based multilayers can be tuned to contain primarily PAA, primarily PAH, or a mixture of PAA and PAH functionalities (i.e., carboxylic acids or amines). The palladium-complex ions of tetraaminepalladium chloride (Pd(NH3)4Cl2) or sodium tetrachloropalladate (Na2PdCl4) bind selectively by ion exchange only to surfaces of PAA or PAH, respectively. Substrates that are coated with regions of PAA-topped and PAH-topped multilayers, fabricated at a PAH pH of 7.5 and a PAA pH of 3.5, bind [Pd(NH3)4]2+ only on the PAA regions. Upon immersion into an electroless nickel plating bath, only the PAA-topped regions of the substrate, activated by the Pd complex, promote...