TY - JOUR T1 - Time-resolved investigation of the acoustic vibration of a single gold nanoprism pair JF - Journal of Physical Chemistry C Y1 - 2008 A1 - Burgin, J. A1 - Langot, P. A1 - Del Fatti, N. A1 - Vallee, F. A1 - Huang, Wenyu A1 - El-Sayed, Mostafa A AB - 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. VL - 112 SN - 1932-7447 N1 - Burgin, J. Langot, P. Del Fatti, N. Vallee, F. Huang, W. El-Sayed, M. A. M3 - 10.1021/jp802365s ER -