“…As show in Figure a, in the range between 150 and 600 cm −1 , both of the Raman spectra exhibited similar behaviors, and four peaks at 188, 237, 280, and 303 cm −1 could be observed. The peaks centered at 188, 237, 280, and 303 cm −1 could correspond to the vibration of the SbSb bond for Sb 2 S 3 structural units, to the antisymmetric SSbS vibration, the antisymmetric vibrations of SbS stretching in pyramidal symmetry, and the symmetric stretching of the SbS structural units, respectively . On the contrary, the Raman spectra in the range of 1300–1700 cm −1 displayed very different behaviors (Figure b).…”