Figure 11.
a) Schematic illustration of the E‐SERS active device. b) Schematic illustration of the finger‐press‐promoted E‐SERS: electrical energy was generated and stored in the film deformation process. c) The Raman spectra of 4‐MP collected from the apple surface using the self‐energizing substrate and AgNWs on a glass substrate. Reproduced with permission.83 Copyright 2017, John Wiley & Sons. d) Real image of backscattering configuration for microsphere‐enhanced Raman spectroscopy (MERS). The wrinkled and self‐resumed microsphere‐embedded film exhibits its excellent flexibility. Top and cross‐section views of a 65 µm BaTiO3 glass microsphere film shown in the left right corner. e) Wave‐guided whispering‐gallery modes and direction antenna effect to enhance Raman scattering. f) MF‐enhanced Raman detection of TiOx on a 3D‐printed Ti6Al4V alloy lightweight component by rapid mapping without excitation laser focusing. Reproduced with permission.181 Copyright 2017, American Chemical Society.