946868.fig.001a
(a)
946868.fig.001b
(b)
946868.fig.001c
(c)
Figure 1: Experimental maps of the 1576 cm−1 BT SERS band of NW/Ag composite using a laser with 514.5 nm wavelength at the same NW, and the sample was rotated for parallel/perpendicular polarization mapping; the polarization is parallel (a) and perpendicular (b) to the NW. (c) Corresponding microscope image of the SERS mapping region of (a) and (b).