Acoustic vibration modes and electron-lattice coupling in self-assembled silver nanocolumns.
Using ultrafast spectroscopy, we investigated electron-lattice coupling and acoustic vibrations in self-assembled silver nanocolumns embedded in an amorphous Al2O3 matrix. The measured electron-lattice energy exchange time is smaller in the nanocolumns than in bulk silver, with a value very close to that of isolated nanospheres with comparable surface to volume ratio. Two vibration modes were detected and ascribed to the breathing and extensional mode of the nanocolumns, in agreement with numerical simulations.
Burgin
J
J
CPMOH, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence Cedex France.
Langot
P
P
Arbouet
A
A
Margueritat
J
J
Gonzalo
J
J
Afonso
C N
CN
Vallée
F
F
Mlayah
A
A
Rossell
M D
MD
Van Tendeloo
G
G
D000162:Acoustics; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004579:Electron Transport; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D014732:Vibration
D046911:Macromolecular Substances; D012834:Silver