Fig. 8. Applications of defective semiconductor-based SERS. (a) Detection of Sudan Red III in Chinese herbal medicines. Reproduced with permission from ref. 40. Copyright 2021, John Wiley and Sons. (b) Detection of tumor cells on functionalized Ag2O substrates. Reproduced with permission from ref. 114. Copyright 2021, Springer Nature. (c) SERS detection of breast cancer cells. Reproduced with permission from ref. 117. Copyright 2019, the Royal Society of Chemistry. (d) SERS-kinetic assay of TMB oxidation. Reproduced with permission from ref. 127. Copyright 2020, American Chemical Society. (e) Photoinduced CT process in TiO2–Ag–MPY–FePc systems. Reproduced with permission from ref. 128. Copyright 2019, John Wiley and Sons. (f) Physical model of 4-MBA molecule movement on the surface of the Ag/Ag-doped TiO2 substrate under laser irradiation. Reproduced with permission from ref. 35. Copyright 2020, Springer Nature.
