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[(a)–(b)] TEM images of the initial NAC film, deposited at , showing (a) the fractal morphology and (b) the nanoscale clusters. [(c)–(f)] Series of TEM images of NAC films coated with different amounts of Ag, equivalent to metal film thicknesses of (c) 1, (d) 3, (e) 5, and (f) .
Histograms of nanoparticle size for equivalent Ag film thicknesses of (a) 1, (b) 3, and (c) . (d) Shows a plot of mean particle size as a function of equivalent Ag film thickness.
(Color online) (a) Raman spectra from drops of the R6G solution on NAC substrates with Ag coatings of 0, 1, 2, and . A linear photoluminescence background has been subtracted, and the spectra have been offset for clarity. (b) Florescence spectra from BSA-FTIC on a series of different substrates. (i) Flat amorphous carbon, (ii) untreated NAC, (iii) equivalent Ag coating, (iv) Ag, and (v) Ag. Inset: Fluorescence image of a protein coated array of NAC patches, patterned onto a flat amorphous carbon surface.
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