TY - JOUR T1 - Relative enhancement of ultrafast emission in gold nanorods JF - The Journal of Physical Chemistry B Y1 - 2003 A1 - Varnavski, O. P. A1 - Mohamed, MB A1 - El-Sayed, Mostafa A A1 - Goodson III, T. AB - Time-resolved fluorescence spectroscopy has been employed to probe the ultrafast emission observed in gold nanospheres and nanorods. The decay of the emission was found to be ≤50 fs. The ultrafast emission from nanorods has been directly compared to that for nanospheres and the dispersion of the relative local field enhancement factor was obtained and compared with calculations. Measurements with both visible and ultraviolet excitations have been analyzed. These results give the first observation and analysis of the mechanism for the local field-enhanced ultrafast emission in gold nanorods and nanospheres. PB - ACS Publications VL - 107 SN - 1520-6106 UR - http://dx.doi.org/10.1021/jp0341265 CP - 14 M3 - 10.1021/jp0341265 ER -