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A5: Nanoscale and low dimensional effects
1Department of Engineering and System Science, NTHU, Taiwan,2Institute of Physics, Academia Sinica, Taiwan,3Nano Science and Technology Program, TIGP, Taiwan.
Uniform single-crystalline bismuth selenide (Bi2Se3) nanowires (NWs) were successfully synthesized using stress-induced growth. The crystallinity of the NWs was analyzed using a transmission electron microscope; the results indicated the formation of single crystal Bi2Se3 NWs, growing along the [11-20] direction. Furthermore, the thermoelectric (TE) transport properties of the fabricated NWs were investigated by measuring the levels of electrical conductivity (σ) and TE power (S) at temperatures of 150 to 320 K. The TE power factor (PF) of a NW 150 nm in diameter reached 16.67 × 10-5 Wm-1K-2 at 300 K. This PF value was larger than any previously reported PF observed in Bi2Se3 nanostructures.