introduced through the microscope objective to the sample (e.g., R6G dye molecules). The back-scattered Raman signal is collected through the objective, cou- pled into an optical fiber, and directed into a HORI - BA iHR320 imaging spectrometer, where the signal is dispersed into its monochromatic components (Fig. 1). A multi-channel Synapse CCD detects the result- ing signal as a function of wavenumber-shift from the excitation laser. Experiments are performed with and without the nanostructure substrate to quantify Ra- man signal-enhancement. 1 Examples Many studies with HORIBA instruments have carried out such scattering measurements. One study from the University of Texas at San Antonio (UTSA) synthe- sized Ag flower-shaped nanostructures. SERS spec - tra of R6G dye molecules we

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