Eur. Phys. J. D 43, 233-236 (2007)
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

Abstract

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.