Fluorescence spectrum properties of gold nanochains

Gold colloidal nanochains with different morphology have been synthesized via electrochemical method. The absorption spectrum features show two peaks at 530 and 780 nm, which result from transverse and longitudinal surface plasmon resonance, respectively. Fluorescence spectrum properties have also been studied, three emission peaks are observed at 370, 660 and 735 nm. These fluorescence emission peaks are due to the local field enhancement via coupling to the transverse and longitudinal surface plasmon resonance.