%0 Journal Article %J Journal of Physical Chemistry C %D 2008 %T Time-resolved investigation of the acoustic vibration of a single gold nanoprism pair %A Burgin, J. %A Langot, P. %A Del Fatti, N. %A Vallee, F. %A Huang, Wenyu %A El-Sayed, Mostafa A %X The acoustic vibration of single gold nanoprism pairs on a glass substrate has been investigated in the time-domain combining a spatial modulation spectroscopy microscope with a high-sensitivity femtosecond pump-probe setup. Three modes were observed and ascribed to two in-plane and one out-of-plane vibration of the nanoprisms forming the pair, in agreement with a theoretical analysis. The periods of the two former modes with similar nature show weak (about 10%) and well correlated pair to pair fluctuations that can be unambiguously ascribed to variation of the prism geometry. In contrast, strong fluctuations, by almost a factor of 6, of the mode damping are evidenced with no correlation with their period. This indicates large variations of the prism-substrate coupling, providing a unique way for its local investigation. %B Journal of Physical Chemistry C %V 112 %P 11231-11235 %8 Jul %@ 1932-7447 %G eng %M WOS:000257927100026 %R 10.1021/jp802365s