Figure 3 :Gold nanorods (NRs) with tunable optical absorptions at visible and near-infrared wavelengths; a) Optical absorption spectra of gold NRs with different aspect ratios (a-e); b) Color wheel, with reference to gold NRs labeled a-e. TR, transverse resonance[51]
![Figure 3 :Gold nanorods (NRs) with tunable optical absorptions at visible and near-infrared wavelengths; a) Optical absorption spectra of gold NRs with different aspect ratios (a-e); b) Color wheel, with reference to gold NRs labeled a-e. TR, transverse resonance[51]](articles/2010/2/4/images/JPharmBioallSci_2010_2_4_282_72127_f4.jpg)