Figure 3

45°-tilted SEM images of the Ag NW networks after (a) 1-hour and (b) 4-hour sunlight illumination with solar concentration of 1 Sun. Both scale bars in the SEM images are 500 nm. (c) Low-magnification and (d) high-resolution TEM images of a representative Ag NW junction illuminated by the 1-Sun sunlight for 1 hour.