TY  - JOUR
AU  - Wu, Xiangshui
AU  - Tao, Qiqi
AU  - Li, Da
AU  - Wang, Qilang
AU  - Zhang, Xiaoyan
AU  - Jin, Huile
AU  - Li, Jun
AU  - Wang, Shun
AU  - Xu, Xiangfan
PY  - 2021
TI  - Unprecedently low thermal conductivity of unique tellurium nanoribbons
JO  - Nano Research
SN  - 1998-0124
SP  - 4725
EP  - 4731
VL  - 14
IS  - 12
AB  - Tellurene, probably one of the most promising two-dimensional (2D) system in the thermoelectric materials, displays ultra-low thermal conductivity. However, a linear thickness-dependent thermal conductivity of unique tellurium nanoribbons in this study reveals that unprecedently low thermal conductivity can be achieved via well-defined nanostructures of low-dimensional tellurium instead of pursuing dimension-reduced 2D tellurene. For thinnest tellurium nanoribbon with thickness of 144 nm, the thermal conductivity is only ~1.88 ± 0.22 W·m−1·K−1 at room temperature. It's a dramatic decrease (45%), compared with the well-annealed high-purity bulk tellurium. To be more specific, an expected thermal conductivity of tellurium nanoribbons is even lower than that of 2D tellurene, as a result of strong phonon-surface scattering. We have faith in low-dimensional tellurium in which the thermoelectric performance could realize further breakthrough.
UR  - https://doi.org/10.1007/s12274-021-3414-7
DO  - 10.1007/s12274-021-3414-7