研究了水蒸气对做法不同的碳纳米管薄膜的影响.实验发现,绝大多数碳纳米管薄膜的电阻随着注入水蒸气量的增大先增后降,从p型半导体转变成n型半导体;个别样品的电阻先降后增.这也许是由于吸附水分子减少的碳纳米管中电子传导,之后又参与传导,和碳纳米管发生电荷转移,改变了它的费米能级,从而产生了掺杂效应.
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