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。
Dr Kamat and his team covered the surface of an experimental cell made of cadmium sulphide, zinc oxide and titanium dioxide with nanotubes, so that the tubes stuck up from the surface like hairs.
Kamat博士及其团队的实验电池以硫化镉(cadmium sulphide)、氧化锌(zinc oxide)、氧化钛(titanium dioxide)为原材料，他们在电池的表面覆盖碳纳米管，使得表面突起的那些“管子”看似头发丝。
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