fig3

Figure 3. Preparation and characterization of POC-PEG/AgNW CPEs. (A) Illustration of preparation of POC-PEG/AgNW CPEs. (B) SEM image of AgNW. (C) TEM image of a single AgNW. (D) UV-Vis spectra of AgNW dispersed in ethanol (0.01 mg mL^-1). (E-G) SEM images of cross sections of POC-PEG/AgNW CPEs with different AgNW layer thicknesses. (H-J) SEM images of surface morphology of POC-PEG/AgNW CPEs with different AgNW layer thicknesses.