A sandwich structured Bi2Te3-nanoplates/graphene-nanosheet (Bi2Te3/G) hybrid has been synthesized by a facile in situ solvothermal route and has been investigated as a potential anode material for Li-ion batteries. Bi2Te3 grows during the solvothermal process with the simultaneous reduction of graphite oxide into graphene. The in situ formation process of the hybrid has been investigated by X-r...

Single-crystal Bi2Te3 nanowires (NWs) and nanoribbons (NRs) were synthesized by a vapor-liquid-solid (VLS) method from Bi2Te3 powder. To investigate the thermal properties of the Bi2Te3 nanostructure, a nondestructive technique based on temperature dependent Raman mapping was carried out. The Raman peaks were red shifted with increasing temperature. In addition, the fraction of the laser power ...

Layered (Bi1-xInx)2Te3-In2Te3 (x = 0.075) composites of pronounced anisotropy in structure and thermoelectric properties were produced by zone melting and subsequent coherent precipitation of In2Te3 from a (Bi1-xInx)2Te3 (x > 0.075) matrix. Employing solid state phase transformation, the Bi2Te3/In2Te3 interface density was tuned by modifying the driving force for In2Te3 precipitation. The struc...

In order to understand the effect of Pb-CuI co-doping on the thermoelectric performance 8 of Bi2Te3, n-type Bi2Te3 co-doped with x at% CuI and 1/2x at% Pb (x = 0, 0.01, 0.03, 0.05, 0.07, and 9 0.10) were prepared via high temperature solid state reaction and consolidated using spark plasma 10 sintering. Electron and thermal transport properties, i.e., electrical conductivity, carrier 11 concent...

In spite of much work on topological insulators (TIs), systematic experiments for TI/TI heterostructures remain absent. We grow a high quality heterostructure containing single quintuple layer (QL) of Bi2Se3 on 19 QLs of Bi2Te3 and compare its transport properties with 20 QLs Bi2Se3 and 20 QLs Bi2Te3. All three films are grown on insulating sapphire (0001) substrates by molecular beam epitaxy (...

The phase equilibria of Bi-Te-RE (Yb, Nd, Sm, Er, Tb) at 673 K were established through equilibrated alloys. isothermal sections according to the result Scanning Electron Microscopy (SEM), probe micro-analysis (EPMA), and Powder X-ray diffractometry (XRD). In Bi-Te-Yb system K, existence 4 three-phase (YbTe+Bi2Te3+Te, YbTe+Bi2Te3+?, YbTe+Bi+?, YbTe+Yb5Bi3+Yb4Bi3) was established, while 3 region...

Bismuth telluride (Bi2Te3) is an attractive material for both thermoelectric and topological insulator applications. Its performance is expected to be greatly improved when the material takes nanowire structures. However, it is very difficult to grow high-quality Bi2Te3 nanowires. In this study, a simple and reliable method for the growth of Bi2Te3 nanowires is reported, which uses post-sputter...

We present a structural and density functional theory study of FexCu1− xSe within the three-dimensional topological insulator Bi2Te3. The FexCu1− xSe inclusions are single-crystalline and epitaxially oriented with respect to the Bi2Te3 thin film. Aberrationcorrected scanning transmission electron microscopy and electron energy loss spectroscopy show an atomically sharp FeICu1− xSe/Bi2Te3 interf...

Using high-resolution angle-resolved photoemission spectroscopy (ARPES), the topological property of the three-dimensional Bi(111) films grown on the Bi2Te3(111) substrate were studied. Very different from the bulk Bi, we found another surface band near the point besides the two well-known surface bands on the 30 nm films. With this new surface band, the bulk valence band and the bulk conductio...

High-yielded Bi2Te3 hexagonal nanoplates were fabricated via a facile solvothermal method with the assistance of poly (vinyl pyrrolidone) (PVP). Effects of PVP molecular weight and concentration on the morphology and size distribution of the products were illustrated in this study. Molecular weight of PVP is significant for determining the morphology of Bi2Te3. The hexagonal nanoplates with hig...