Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
Yujing Zhao
College of Mechanical engineering and Photoelectric Physics, and Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol Fiber Material, Huaihua University, Huaihua, Hunan 418008, China
Weichang Zhou
Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
Dongsheng Tang
Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
BiTe has been widely used as thermoelectric material. Here the BiTe nanotubes were synthesized by solvothermal method for the first time. The BiTe nanotubes were characterized via scanning electron microscope (SEM), X-ray diffraction (XRD) as well as transmission electron microscope (TEM), indicating the high crystal qualities of as-prepared products. The lattice dynamics of BiTe nanotubes was further studied via the micro-Raman scattering spectra in the temperature range of 103-593 K. Both the peak position and mode width of 2Ag1, 1Eg1 exhibit an obvious change with decreased temperature. All the Eg1, A1g1, Eg2, A1g2 modes have ultralow temperature coefficients of 1.85 × 10−5, 1.98 × 10−4, 1.09 × 10−4, 2.34 × 10−4 cm−1/K, respectively, which should be beneficial for obtaining high figure of merit (ZT) and confirm the outstanding thermoelectric performance of BiTe nanotubes.
