At the moment oxides of metals such as zinc and copper seem to be the favourites, but tiny tubes made of carbon are also being explored.
目前看多是用诸如锌、铜等金属的氧化物，但碳原料的微小管件也被开发出来。
2
The nitrogen Deoxo Vessel contains a fixed bed of free copper catalyst which removes oxygen from the nitrogen stream by oxidation of copper to copperoxides.
氮气脱氧罐中装有一个游离铜催化剂的固定床，通过将铜氧化成氧化铜把氧气从氮气中脱除。
3
Owing to unique physical and chemical properties, copper family metal and metal oxides in nanostructure have exhibited promising applications in catalysis, sensing, optics, and magnetics.