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首页> 外文期刊>Advanced Functional Materials >Fabrication and surface functionalization of nanoporous gold by electrochemical alloying/dealloying of Au-Zn in an ionic liquid, and the self-assembly of L-cysteine monolayers
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Fabrication and surface functionalization of nanoporous gold by electrochemical alloying/dealloying of Au-Zn in an ionic liquid, and the self-assembly of L-cysteine monolayers

机译：通过在离子液体中对Au-Zn进行电化学合金化/脱合金来制备纳米多孔金和对其进行表面功能化，以及L-半胱氨酸单层的自组装

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This paper describes a totally electrochemical process for the fabrication and functionalization of high-surface-area, nanoporous gold films. The fabrication process involves the electrodeposition of a binary gold-zinc alloy at gold wires, followed by subsequent electrochemical dealloying of the less noble component zinc from the surface. Both the deposition and dealloying steps are conducted in a single low-temperature bath of 40.0-60.0 mol-% zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquid at 120 degrees C without using any other corrosive acids or bases. The porous structure and morphology of the nanostructured gold film could be controlled by electrochemical variation of the composition of the Au-Zn surface alloy. It is demonstrated that the nanoporous gold surface can be successfully functionalized with self-assembled monolayers of L-cysteine. Such functionalization greatly improves the utility of the nanoporous gold, as is demonstrated in the sensitive and selective determination of Cu(II).
机译：本文描述了用于高表面积纳米多孔金膜的制造和功能化的完全电化学方法。制造过程包括在金丝上电沉积二元金锌合金，然后从表面进行次贵金属锌的电化学脱合金。沉积和脱合金步骤均在120°C的40.0-60.0 mol％氯化锌-1-乙基-3-甲基咪唑鎓氯化物离子液体的单个低温浴中进行，无需使用任何其他腐蚀性酸或碱。可以通过电化学改变Au-Zn表面合金的成分来控制纳米结构金膜的多孔结构和形态。证明了纳米孔金表面可以用L-半胱氨酸的自组装单层成功地官能化。如对铜（II）的灵敏和选择性测定所证明的，这种官能化极大地提高了纳米多孔金的效用。

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