Figure 1.

(a) Plot of the periodic structure of Si3N4 SWS with 1 × 1 and 2 × 2 arrays as unit cell. 3D schematic plots of the examined (b) cylinder-, (c) right circular cone-, and (d) square pyramid-shaped structure, respectively.

Li et al. Nanoscale Research Letters 2012 7:196   doi:10.1186/1556-276X-7-196
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