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首页> 外文期刊>Crystal growth & design >Hydrothermal synthesis and thermoelectric transport properties of uniform single-crystalline pearl-necklace-shaped PbTe nanowires
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Hydrothermal synthesis and thermoelectric transport properties of uniform single-crystalline pearl-necklace-shaped PbTe nanowires

机译：均匀单晶珍珠项链形PbTe纳米线的水热合成和热电输运性质

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摘要

Uniform single-crystalline pearl-necklace-shaped PbTe nanowires with an average diameter of about 30 nm, smaller than its average excitonic Bohr radius of 46 nm, were successfully synthesized by a hydrothermal process using tellurium nanowires as templates and Pb(NO3)(2) as a precursor at a molar ratio of 1:1. It is shown that the reaction temperature, duration, and concentration of Pb(NO3)(2) play important roles in the formation of the PbTe nanowires. The growth process of the pearl-necklace-shaped PbTe nanowires can be reasonably explained by an oriented attachment mechanism. Thermoelectric transport measurement indicates that the film composed of the obtained PbTe nanowires has a Seebeck coefficient of about 307 mu V/K, up to about 16% higher than that of the state-of-the-art bulk PbTe at room temperature. The synthetic route can be applied to obtain other low-dimensional semiconducting telluride nanostructures and optimization of the thermoelectric properties through nanowire alignment and doping may lead to practical applications.
机译：通过以碲纳米线为模板和Pb（NO3）（2）的水热法成功合成了平均直径约30 nm，小于平均激子玻尔半径46 nm的均匀单晶珍珠项链状PbTe纳米线。 ）的摩尔比为1：1。结果表明，Pb（NO3）（2）的反应温度，持续时间和浓度在PbTe纳米线的形成中起重要作用。珍珠项链状PbTe纳米线的生长过程可以通过定向附着机制合理地解释。热电传输测量表明，由获得的PbTe纳米线组成的薄膜的塞贝克系数约为307μV / K，比室温下最新的块状PbTe高出约16％。该合成路线可用于获得其他低维半导体碲化物纳米结构，并且通过纳米线排列和掺杂对热电性质的优化可能会导致实际应用。

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