Figure 43.

(A) SEM images and electric field distribution of the synthesized half ellipsoidal TiO₂ nanostructures and the molar ratios of oxidized (squares) and reduced (circles) Cyt b₅ on the TiO₂ electrodes. Adapted with permission from ref (412). Copyright 2013 Wiley-VCH Verlag. (B) SEM images and calculated electric field for the TiO₂ nanotube electrodes and SERS spectra of Cyt b₅ adsorbed on the fabricated TiO₂ nanotube electrodes with different annealing temperatures. Adapted with permission from ref (413). Copyright 2018 Wiley-VCH Verlag. (C) SEM and HRTEM images of the K₂Ti₆O₁₃ NWs; structure of the K₂Ti₆O₁₃ NWs; schematic diagram of the photoinduced CT mechanism; Raman and SERS spectra of cytochrome c (Cyt c), the spectra from bottom to top are for the oxidized form of Cyt c (532 nm laser), reduced form of Cyt c (532 nm laser), Fe³⁺ Cyt c on K₂Ti₆O₁₃ (532 nm laser), Fe³⁺ Cyt c on K₂Ti₆O₁₃ (633 nm laser), and reduced form of Cyt c (633 nm laser). Adapted with permission from ref (414). Copyright 2021 Elsevier.