Fig. 2From: 3D Hierarchical Bi2S3 Nanostructures by Polyvinylpyrrolidone (PVP) and Chloride Ion-Assisted Synthesis and Their Photodetecting Properties a, b Typical SEM images of V-Bi2S3. c, d TEM image and HRTEM image of V-Bi2S3, respectivelyBack to article page