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(A) SERS signals from pMBA molecules on gold-coated silicon nanowire substrates, for different spacing between neighboring nanowires in the one-dimensional array of nanowires. The SERS substrate chips were coated with pMBA molecules by dipping the chips in a 1 mM ethanol solution of pMBA. (B) SERS signal from Cy3 dye-labeled breast cancer gene sequence (ERBB2) molecules on gold-coated silicon nanowire substrates.
