Figure 1: (Left) AFM image shows an isolated nanowire of carbon nanotube on a Silicon surface . (Right) Online Raman map of the CNT nanowire obtained online pixel-by-pixel with the AFM image (left). The Raman map shows Raman integrated intensity between the carbon bands at 1540cm-1 and 1640cm-1.

Raman Mapping Parameters: Objective: 50 X LWD N.A=0.5 Raman step size (X & Y): 0,2 µm Laser 532 nm, grating: 600 l/mm Measurement time: 5s/point

WSxM software has been used for image processing of the pictures above: I. Horcas et al. Rev. Sci. Instrum. 78, 013705 (2007).

Figure 2: (Left) A CNT nanowire Raman map shows a band shift of the G-band along the nanowire (1575cm-1, green) and the graphite cluster aggregates (1580cm-1, red).