Figure 2.

Hybrid nanostructure and Au nanoplates. (a) A schematic cross-sectional illustration of the hybrid nanostructure, where the Si ND array is separated from the Au nanoplates by a capping layer of SiO2 with a thickness of 3 nm. (b) A SEM image of the Au nanoplates fabricated on the Si ND array by electron-beam lithography. The length of one side of the Au square pattern was designed to be 150 nm.

Nakaji et al. Nanoscale Research Letters 2012 7:629   doi:10.1186/1556-276X-7-629
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