title: Electronic and vibrational dynamics of hollow au nanocages embedded in cu2 o shells.
abstract: We have synthesized hollow Au nanocages embedded within thick porous shells of cuprous oxide (Cu2 O). The shell causes a significant redshift of the localized surface plasmon resonance of Au into the near-IR. Electron-phonon coupling in the Au nanocage is 3-6 times faster in the core-shell structure due to the higher thermal conductivity of Cu2 O compared to water. Coherent phonon oscillations within the Au lattice are characterized by a breathing mode of the entire structure for both bare and core-shell nanocages, an assignment made through the use of structural mechanics simulations. The experimental frequencies are obtained through simulations by selectively applying a force to the shell of the core-shell structure. We interpret this as rapid thermal expansion of the gold leading to a mechanical force that acts on the shell.
authors: Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA.
authors: Paul
authors: P
authors: Szymanski
authors: Mahmoud A
authors: MA
authors: Mahmoud
authors: Daniel
authors: D
authors: O'Neil
authors: Batyr
authors: B
authors: Garlyyev
authors: Mostafa A
authors: MA
authors: El-Sayed