Abstract Carbon nanotubes (CNTs) are usually very expensive, but inexpensive CNTs have been mass-produced by a super-growth (SG) method. The SG-CNTs, however, have many defects resulting in a low conductivity, which is a disadvantage of the SG-CNTs. We discovered that even the defective SG-CNTs can provide a good thermoelectric performance by forming ternary hybrid films made of the SG-CNTs, nanoparticles (NPs) of a conducting polymer complex, poly(nickel 1,1,2,2-ethenetetrathiolate) (PETT) and poly(vinyl chloride) (PVC). The good thermoelectric performance of the ternary film (PETT-NP/SG-CNT/PVC) was possibly attributed to the defect repair effect in addition to the bridging effect of the PETT-NPs among the CNTs. In order to confirm this new concept, we attempted the deposition of metal NPs at the defects of the SG-CNTs. We initially made a physical mixture of palladium (Pd) NPs and the SG-CNTs in dispersions to cover the SG-CNT defects with the Pd-NPs. The obtained films showed only a slight improvement in electrical conductivity. Chemical reduction of the Pd ions in the dispersion of the SG-CNTs, on the other hand, provided hybrids with an enhanced electrical conductivity, thus, use as thermoelectric materials. The thermoelectric figure-of-merit was estimated to be ∼0.3, which is a relatively high value for organic hybrid materials.

中文翻译：

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用于有机杂化热电的纳米粒子和碳纳米管的组合

摘要 碳纳米管 (CNTs) 通常非常昂贵，但廉价的 CNTs 已经通过超生长 (SG) 方法大量生产。然而，SG-CNTs 具有许多缺陷，导致低导电性，这是 SG-CNTs 的一个缺点。我们发现，即使是有缺陷的 SG-CNTs 也可以通过形成由 SG-CNTs、导电聚合物复合物的纳米颗粒 (NPs)、聚（镍 1,1,2,2-乙烯四硫醇盐）制成的三元混合薄膜来提供良好的热电性能（PETT）和聚（氯乙烯）（PVC）。三元薄膜（PETT-NP/SG-CNT/PVC）良好的热电性能可能归因于PETT-NPs在CNTs之间的桥接效应之外的缺陷修复作用。为了证实这个新概念，我们尝试在 SG-CNTs 的缺陷处沉积金属纳米颗粒。我们最初将钯 (Pd) NPs 和 SG-CNTs 制成分散体的物理混合物，以用 Pd-NPs 覆盖 SG-CNT 缺陷。所得薄膜的导电性仅略有改善。另一方面，SG-CNT 分散体中 Pd 离子的化学还原为杂化物提供了增强的导电性，因此可用作热电材料。热电品质因数估计为~0.3，这对于有机杂化材料来说是一个相对较高的值。因此，用作热电材料。热电品质因数估计为~0.3，这对于有机杂化材料来说是一个相对较高的值。因此，用作热电材料。热电品质因数估计为~0.3，这对于有机杂化材料来说是一个相对较高的值。