Prospects of nanostructures Bi1−xSbx for thermoelectricity

► SMSC transition in semimetal Bi-Sb wires due to the quantum size effect is observed. ► In Bi-6 at%Sb wires alloys has been realized the gapless (GL) state. ► In the area GS state abnormal growth thermopower in magnetic fields is found out. ► Semiconductor Bi1−x Sbx nanowires manifest properties of the topological insulators.