We report that platinum-assisted chemical etching formed self-organized helical pores in silicon substrates can be utilized as platforms for the electrochemical production of nanohelices of conducting polymers (polypyrrole) and metals (gold). Surprisingly, the nanohelices thus created are tubes although the polymerization and deposition were carried out by anodic and cathodic reactions, respectively. Based on our results, we propose a common mechanism for the formation of tubular nanohelices by both anodic polymerization and cathodic deposition through the accumulation of reactants in microporous silicon which covers the wall surface of the helical pores.

中文翻译：

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通过阳极聚合和使用硅电极上螺旋孔的阴极沉积形成螺旋纳米管的常见机理

我们报告说，铂辅助化学刻蚀可在硅基底中形成自组织的螺旋孔，可用作电化学生产导电聚合物（聚吡咯）和金属（金）的纳米螺旋的平台。出乎意料的是，尽管分别通过阳极和阴极反应进行聚合和沉积，但是由此产生的纳米螺旋是管。根据我们的研究结果，我们提出了一种通过阳极聚合和阴极沉积（通过覆盖螺旋孔壁表面的微孔硅中的反应物的积累）形成管状纳米螺旋的共同机制。