Aqueous chemical synthesis of nanoscale Bi2(Te,Se)3 and (Bi,Sb)2Te3 thermoelectric compounds

Surfactant-assisted solvothermal synthesis of single-crystalline ternary Bi–Sb–Te hexagonal nanoplates

“…The binary Bi 2 Te 3 nanostructure with various morphologies such as nanoparticles [10][11][12], nanosheets [13], nanowires [14,15], hollow nanospheres [16], nanotubes [17] and nanoplates [18,19] has been prepared by solvo/hydrothermal method, wet chemical reactions. Bi 2 (Te,Se) 3 nanoparticle [20], Bi 2 Te 2.7 Se 0.3 and Bi 0.5 Sb 1.5 Te 3 nanocrystals [21], Bi 2 Te 2 Se and BiSbTe 3 hexagonal nanoplatelets are also synthesized by the chemical ways [22]. In this work, the morphology of ternary (Bi,Sb) 2 Te 3 nanocrystal is tried to regulate and control by the solvothermal route.…”

Bismuth, antimony and tellurium alloy nanoparticles with controllable shape and composition for efficient thermoelectric devices

“…The wire morphology was retained, illustrating the relatively non‐destructive nature of the thermal treatment process. It is important to note that the NW morphology is retained because high pressure was not used to prepare the device, which is in contrast to how nanostructured TE materials are prepared by many other researchers 3, 8. Next the Seebeck coefficient, S , and power factor, S 2 σ , were determined using a traditional Peltier module experimental setup.…”

“…To date, a majority of the synthetic approaches used thus far have focused on traditional techniques which offer few chances to tune the materials true nanoscale size, shape, structure or composition, which are all important parameters for maximizing TE activity 1, 2, 7. Commonly used approaches such as hydrothermal 8, electrochemical deposition 9, sputtering 10, mechanical alloying 11, spark plasma sintering 12 or rapid solidification processes 13, all have drawbacks as the resulting nanoscale size, shape and composition are difficult to control. In response to the challenges encountered in these preparation techniques, researchers have begun to explore a range of chemical synthesis routs towards nanoparticles (NP) with controllable properties in terms of size, shape, composition, etc.…”

Synthesis of Bi-Sb-Te thermoelectric material by the plasma arc discharge process

“…It was expected that ultrafine powders of Bi 2 Te 3 -based alloys with nano-sized diameters would make it easier to manufacture a high performance Bi 2 Te 3 -based thermoelectric material with sub-micrometer range microstructure via the powder metallurgy process. However, the synthesis and characterization of the Bi 2 Te 3 -based ultrafine powder with nano-sized diameter, which is used in thermoelectric applications, have rarely been studied [14][15][16]. Generally, Bi 2 Te 3 -based powders have been made by the melting-crushing and mechanical alloying methods.…”