Figure 2.

(a) Representative EDX spectrum of Bi_2−xSb_xTe₃ NWs; (b) Mapping of the Bi_2−xSb_xTe₃ NWs reveal uniform presence of the constituent elements: bismuth (green), tellurium (blue) and antimony (pink). The scale bar in the mapping indicates 1 µm; (c) Table showing the nominal atomic % of Bi, Sb and Te elements and the actual atomic % of the same elements present in the samples, which reveal that the samples are slightly rich in tellurium. Tellurium may be present in metallic form within the samples.