Figure 4

Schematic illustration of tapered-edge structures of Apertures A–C. (a–c) Schematic illustration of tapered-edge structures of Apertures A–C based on the FE-SEM and laser scanning confocal microscopic images.

Schematic illustration of tapered-edge structures of Apertures A–C. (a–c) Schematic illustration of tapered-edge structures of Apertures A–C based on the FE-SEM and laser scanning confocal microscopic images.