这需要消耗电力,而且由于微孔上积满了细菌,滤水器元件也需经常更换。
Dr Cui s filter, though, does not screen the bacteria out. It kills them.
但是崔教授研制的滤水器并不是将细菌排除出去,而是将其消灭。
The filter element he and his team have designed is a mesh of tiny carbon cylinders, knownas nanotubes, and silver wires laid on top of a thin strip of cotton cloth.
崔教授及其团队所设计的滤水器元件采用微小的碳圆柱形网状物,也就是碳纳米管。
Silver is well known to kill bacteria, so Dr Cui conjectured that forcing bugs to pass close tothe metal without actually trapping them might lead to their destruction.
薄薄的棉布覆盖着碳纳米管一端,并用银丝固定。金属银因能够杀死细菌而为人所知。崔教授据此推测将细菌引至银丝附近而不是使其进入微孔,即可消灭细菌。
He also suspected that running an electric current through the silver might help the process,because electrical fields have the ability to break down the membranes that surroundbacterial cells.
他同时猜测,使银丝接通电流,将有助于整个过滤工序,因为电场具有穿透细菌细胞膜的特性。
Though silver is a good conductor, carbon is cheaper, and the nanotubes provide the extraelectrical conductivity needed.
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