Optical properties of the HER2 IgY-SWNT complex. (A) Raman spectra. (B) UV-visible-NIR spectra at different nanotube concentrations (from top to bottom: 49.70, 33.02, 21.61 and 15.11 μg/ml). Inset shows the linear relationship of the absorption at 808 nm versus concentration (optical path = 0.3 cm).
Xiao et al. BMC Cancer 2009 9:351 doi:10.1186/1471-2407-9-351