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. Author manuscript; available in PMC: 2014 Oct 8.
Published in final edited form as: IEEE J Sel Top Quantum Electron. 2014 May/June;20(3):6900806. doi: 10.1109/JSTQE.2014.2301016

Fig. 2.

Fig. 2

(a) SEM image of Ag NPs on the diatom frustule. (b) SEM image of Ag NPs on the glass substrate. (c) Optical image of Ag NPs on a diatom frustule with focal plane at the diatom surface. (d) Optical image of Ag NPs with focal plane on the glass substrate.