fig1

Figure 1. (A) The preparation process of Bi2Se3+x/PVDF composite films; and (B) a digital photograph of the flexible Bi2Se3+x/PVDF films.
Figure 1. (A) The preparation process of Bi2Se3+x/PVDF composite films; and (B) a digital photograph of the flexible Bi2Se3+x/PVDF films.
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