https://doi.org/10.1140/epjd/e2007-00106-9
Electronic structure of dendrimer-encapsulated Au nanocluster
1
Department of Mechanical and Systems Engineering, Kobe University, Nada-ku, Kobe, 657-8501, Japan
2
Department of Mechanical Engineering, Kobe University, Nada-ku, Kobe, 657-8501, Japan
3
Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, Okazaki, Aichi, 444-0867, Japan
Corresponding author: a 032d811n@stu.kobe-u.ac.jp
Received:
26
July
2006
Revised:
1
November
2006
Published online:
24
May
2007
We have carried out optical and X-ray photoemission studies of the dendrimer-encapsulated Au nanoclusters. The dendrimer-encapsulated Au nanoclusters are prepared by the chemical reduction of Au ions loaded within the dendrimer templates. Photoluminescence spectrum of the dendrimer-encapsulated Au nanoclusters with diameter of about 1.0 nm shows the visible luminescence centered at about 2.8 eV. In addition, we have measured the nanocluster-size dependent photoemission spectra in the valence-band region. From line shape analysis of Au 4f X-ray photoemission spectra, Au 4f core-level spectra of the dendrimer-encapsulated Au nanoclusters reflect the size dependent chemical-states. From these results, we discuss electronic structures and chemical states of the dendrimer-encapsulated Au nanoclusters.
PACS: 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 81.07.Pr – Organic-inorganic hybrid nanostructures
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007