Electronic and Vibrational Dynamics of Hollow Au Nanocages Embedded in Cu2O Shells |
| |
| Authors: | Paul Szymanski Mahmoud A Mahmoud Daniel O'Neil Batyr Garlyyev Mostafa A El‐Sayed |
| |
| Institution: | 1. Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA;2. King Abdulaziz University, Jeddah, Saudi Arabia |
| |
| Abstract: | We have synthesized hollow Au nanocages embedded within thick porous shells of cuprous oxide (Cu2O). 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 Cu2O 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. |
| |
| Keywords: | |
|
|
