Abstract
将不同比例的多壁碳管（MWNTs）与聚偏二氟乙烯（PVDF）聚合物混合后，喷涂于n 型ZnO 半导体纳米线阵列上，制备了一种新型ZnO 纳米线基MWNTs/PVDF 热电复合材料. 与以往采用价格昂贵的p 型与n 型单壁碳纳米管（SWNTs）与聚合物混合制备的复合热电材料特性相比，这种新型热电复合材料在降低制造成本的同时，利用分散于聚合物中MWNTs 的一维电子传输特性及形成的大量界面势垒，加上ZnO 半导体纳米线具有的较高载流子密度与迁移率，提高了复合热电材料中电子的输运特性，增加了材料对声子的散射强度. 测试发现，在一定的温度梯度下，随着MWNTs 添加质量百分比的增加，热电材料的温差电动势和电导率也随之增加，但其Seebeck 系数变化量不大. 研究表明，这种热电材料有望替代采用p 型与n 型SWNTs 构建的SWNTs/PVDF 复合热电材料. 研究结果对开发超轻、无毒、廉价、可应用于各种微纳电子领域的新型电源具有重要的参考价值.
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