Fabrication of a highly-ordered and high-density nanoporous metal

采用钛阳极氧化法制备了高密度纳米多孔钛结构。通过在NH4F / H2O乙二醇溶液中进行钛氧化，可以制备出高度有序的二氧化钛纳米管层。阳极氧化后，通过机械去除纳米管层，在钛基体上形成高密度的纳米韧窝结构。另一方面，由于钛的烧结，用钙还原剂在CaCl2熔盐中进行化学钙还原，使阳极氧化制备的纳米管结构损失。

A high-density nanoporous titanium structure was fabricated bytitanium anodizing. A highly-ordered titania nanotube layer can be fabricated by titaniumanodizing in a NH4F / H2O ethylene glycol solution. After anodizing, a high-densitynano-dimple structure was formed on the titanium substrate by mechanical removal of thenanotube layer. On the other hand, the nanotube structure fabricated by anodizing was lostby electroless calcium reduction with a calcium reductant in CaCl2 molten salt due to thesintering of titanium.