TY - JOUR
T1 - Kirkendall synthesis and characterization of nanotubular (Bi2)m(Bi2Te3)n series
AU - Wang, Cuie
AU - Liao, Kaiming
N1 - Publisher Copyright:
© 2022
PY - 2022/8
Y1 - 2022/8
N2 - The (Bi2)m(Bi2Te3)n series, as well-studied thermoelectric materials, have also attracted worldwide attention for their unique topological insulator property. However, only one of several compounds in the Bi-Te systems is synthesized, especially for one-dimensional structures. Herein, a two-step solvothermal process has been designed to synthesize nanotubular (Bi2)m(Bi2Te3)n series (i.e., Bi2Te3, Bi4Te3, BiTe, and Bi2Te3-Te) by optimizing the concentration of Bi agent and altering the microstructure of Te precursors during the reaction process regarding “Kirkendall effect”. The results were verified by powder X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDS), high-resolution transmission electron microscope (HR-TEM), selected area electron diffraction (SAED), and inductively coupled plasma optical emission spectrometer (ICP-OES). A possible growth mechanism was proposed based on experimental results. This work provides a feasible way to selectively synthesize (Bi2)m(Bi2Te3)n compounds with tunable composition and structure.
AB - The (Bi2)m(Bi2Te3)n series, as well-studied thermoelectric materials, have also attracted worldwide attention for their unique topological insulator property. However, only one of several compounds in the Bi-Te systems is synthesized, especially for one-dimensional structures. Herein, a two-step solvothermal process has been designed to synthesize nanotubular (Bi2)m(Bi2Te3)n series (i.e., Bi2Te3, Bi4Te3, BiTe, and Bi2Te3-Te) by optimizing the concentration of Bi agent and altering the microstructure of Te precursors during the reaction process regarding “Kirkendall effect”. The results were verified by powder X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDS), high-resolution transmission electron microscope (HR-TEM), selected area electron diffraction (SAED), and inductively coupled plasma optical emission spectrometer (ICP-OES). A possible growth mechanism was proposed based on experimental results. This work provides a feasible way to selectively synthesize (Bi2)m(Bi2Te3)n compounds with tunable composition and structure.
KW - Kirkendall effect
KW - Low-dimensional nanostructures
KW - Solvothermal process
KW - Thermoelectric nanomaterial
KW - Topological insulator
UR - http://www.scopus.com/inward/record.url?scp=85127841779&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2022.111827
DO - 10.1016/j.materresbull.2022.111827
M3 - 文章
AN - SCOPUS:85127841779
SN - 0025-5408
VL - 152
JO - Materials Research Bulletin
JF - Materials Research Bulletin
M1 - 111827
ER -