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. 2014 Sep 11;4:6340. doi: 10.1038/srep06340

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Fabrication of GCHMM (a) Schematic of fabricated Ag diffraction grating coupled Ag/Al₂O₃ HMM (GCHMM), which consists of 6 pairs of Ag/Al₂O₃. (b) SEM image of 2D Ag diffraction grating on top of the PMMA layer with an average period of 500 nm and hole size of 160 nm.