Abstract In this work, the chemical de-alloying behavior of Au30Cu38Ag7Pd5Si20(at.%) amorphous alloy which was rapidly solidified from the melt in the form of ribbons were investigated. First a comparison between samples de-alloyed in nitric acid with and without HF was conducted to achieve homogeneous de-alloying process. Then the morphology and structure of nanoporous gold (NPG) were adjusted by tuning the de-alloying parameters, such as HNO3 concentration, electrolyte temperature and de-alloying time. Finally the surface enhanced Raman scattering(SERS) capability of the as-prepared NPG was evaluated using 4,4′-bi-pyridine as probe molecule.

中文翻译：

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改善非晶金合金的化学脱合金

摘要 在这项工作中，研究了从熔体中快速凝固成带状的 Au30Cu38Ag7Pd5Si20(at.%) 非晶合金的化学脱合金行为。首先，在有和没有 HF 的硝酸中脱合金的样品之间进行比较，以实现均匀的脱合金过程。然后通过调整脱合金参数，如 HNO3 浓度、电解液温度和脱合金时间来调整纳米多孔金 (NPG) 的形貌和结构。最后，使用 4,4'-双吡啶作为探针分子评估所制备 NPG 的表面增强拉曼散射（SERS）能力。