Fig. 3. Semiconductors with lattice disorders and their SERS performances. (a) The HRTEM micrographs of amorphous TiO2 nanosheets and Raman spectra of 4-MBA on crystalline and amorphous TiO2. Reproduced with permission from ref. 64. Copyright 2019, American Chemical Society. (b) HAADF-STEM image of the ultrathin WO3 nanosheet with surface defects, and Raman spectra of MB on the WO3 bulk material and ultrathin nanosheets. Reproduced with permission from ref. 69. Copyright 2021, John Wiley and Sons. (c) Self-assembly process for the formation of Cu2O cube-like superstructures by lattice fusion, and SERS enhancement comparison between different morphologies of Cu2O. Reproduced with permission from ref. 38. Copyright 2016, John Wiley and Sons.
