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(a) Representative image and (b) spectrum of a single SK-BR-3 cell bound with HER-2 Ab labeled 60 nm gold nanospheres. (Scale bar = 10 μm.) Note that plasmonic coupling causes a redshift in the scattered light. (c) Distribution of peak scattering wavelength of SK-BR-3 cells bound with HER-2 Ab labeled 60 nm gold nanospheres. Distribution fit has peak wavelength of 587.0 ± 11.9 nm (N = 122). Adapted from Ref. 30.
