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. Author manuscript; available in PMC: 2011 Jan 15.
Published in final edited form as: Biosens Bioelectron. 2009 Oct 7;25(5):1240. doi: 10.1016/j.bios.2009.09.040

Fig. 2.

Fig. 2

(a) Schematic of the aptamer-VP recognition binding reaction. (b) Fluorescence images of FITC-labelled aptamer-VP reaction on 200 μm patterned spots under the following conditions (1) background control sample of bare nanotube arrays, (2) after immobilization of the aptamers, (3) after aptamer-BSA reaction (negative control) and (4) after aptamer-VP reaction (positive control). (c) SERS spectra of aptamer-VP reaction corresponding to the first 3 cases described shown in image (b) and (4) for 200 nm Au nanotube arrays and (5) Au/Ag/Au nanotube arrays.