Solid-Phase Reactions and Phase Transformations in a Nanoscale Bismuth/Selenium Film Structure
Experimental results of a study concerned with solid-phase reactions and phase transformations in a Bi/Se nanoscale film structure under heat treatment in vacuum are presented. Nanocrystalline Bi2Se3, BiSe, and Bi4Se3 films are obtained for the first time by solid-phase synthesis at various ratios between the Bi and Se layer thicknesses. The phase-transformation temperatures at which Se, BiSe, and Bi4Se3 crystalline phases are formed are determined. The average crystallite sizes in the Bi2Se3, BiSe, and Bi4Se3 films are found to be 21, 23, and 33 nm, respectively.
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