Optimal Synthesis of Horizontally Aligned Single-Walled Carbon Nanotubes and Their Biofunctionalization for Biosensing Applications

Figure 5

2D Raman mapping images recorded at ((a), (b), (c)) intact individual carbon nanotubes in the HACNT array, ((d), (e), (f)) the same tubes functionalized with NH₂-diazonium, and ((g), (h), (i)) the same tubes functionalized with NH₂-diazonium/rhodamine dye in sequence. All scale bars represent 2 μm. (j) Three Raman spectra for each sample are depicted, indicating radial breathing mode (RBM), D-band, G-band, and G′-band.

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