Fig. 9From: Micro-Extinction Spectroscopy (MExS): a versatile optical characterization techniqueStructure–sensitivity correlation conducted by using MExS and SEM. a FOM vs. side length of Au NPs. NPs of the same size in samples 1 and 2 have different FOM, making the latter better for sensing applications. b FOM vs. normalized radius of Au NPs. The variation of FOM as a function of normalized tip radius is equivalent for all three samplesBack to article page