Synthesis of Bi2Se3 thermoelectric nanosheets and nanotubes through hydrothermal co-reduction method
2004; Elsevier BV; Volume: 177; Issue: 11 Linguagem: Inglês
10.1016/j.jssc.2004.06.042
ISSN1095-726X
AutoresHongmei Cui, Hong Liu, Xia Li, Jing Wang, Feng Han, Xudong Zhang, Robert I. Boughton,
Tópico(s)Thermal Radiation and Cooling Technologies
ResumoBi2Se3 nanosheets and nanotubes were prepared by a hydrothermal co-reduction method at 150, 180, 200, and 210 °C. Bi2Se3 nanosheets, nanobelts and nanotubes were obtained. The Bi2Se3 nanoflakes are 50–500 nm in width and 2–5 nm in thickness. The Bi2Se3 nanotubes are 5–10 nm in diameter, 80–120 nm in length, and 1.3 nm in wall thickness. X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, and electron diffraction were employed to characterize the products. Experimental results showed that the nanosheets and the nanotubes are hexagonal in structure with a=4.1354 Å and c=27.4615 Å. A possible formation and crystal growth mechanism of Bi2Se3 nanostructures is proposed.
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