Hydrothermal synthesis and thermoelectric transport properties of Sb2Te3-Te heterogeneous nanostructures

作者：Shi, Weidong^*; Yu, Shuai; Liu, Pei; Fan, Weiqiang

来源：CrystEngComm, 2013, 15(15): 2978-2985.

DOI：10.1039/c3ce27010f

• SELECTIVE GROWTH
• METAL TIPS
• TELLURIUM
• NANOTUBES
• HYDROXIDE
• NANORODS

Sb2Te3-Te barbell-like heterogeneous nanostructures (HNs) composed of single-crystalline Sb2Te3 nanoplates and Te nanorods have been fabricated via a facile hydrothermal approach. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and scanning TEM (STEM). The barbell-like heterogeneous nanostructures can be synthesized by properly tuning the reaction time, temperature and the molar ratio of the reactants. Based on a series of contrast experiments, the probable epitaxial growth process that Sb2Te3 nanoplates grow perpendicular to the axis of the central of the Te nanorods is proposed. The obtained Sb2Te3-Te heterogeneous nanostructures have a room-temperature electrical conductivity and Seebeck coefficient of 150.2 S cm(-1) and 148.1 mu V K-1, respectively, and a maximum power factor of 1.02 mW K-2 m(-1) can be obtained at 550 K.

• 出版日期2013
• 单位江苏大学