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Quantum Antidot Formation and Correlation to Optical Shift of Gold Nanoparticles Embedded in MgO
Physical Review Letters
Quantum antidots are subnanometer scale vacancy clusters, the localized electronic structure of which can significantly alter the properties of a nanomaterial. We use positron spectroscopy to study vacancy clusters generated during the formation of gold nanoparticles via ion implantation in an MgO matrix. We observed that quantum antidots are associated with the nanoparticle surfaces after annealing in an O 2 atmosphere, but not after annealing in a H 2 atmosphere. In the former case, thedoi:10.1103/physrevlett.88.175502 pmid:12005767 fatcat:xdl7poklrjha3mow4l5p4oqu2q