Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-24T13:24:32.718Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectroscopic Investigations of Dendrimer-Au Hybrid Nanoclusters

Published online by Cambridge University Press:  01 February 2011

Akinori Tanaka ,
Yoshiaki Murase ,
Takanobu Kitagawa ,
Masaki Imamura  and
Hidehiro Yasuda
Akinori Tanaka
Affiliation:
[email protected], Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan, +81-78-803-6123, +81-78-803-6123
Yoshiaki Murase
Affiliation:
[email protected], Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Takanobu Kitagawa
Affiliation:
[email protected], Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Masaki Imamura
Affiliation:
[email protected], Kobe University, Department of Mechanical and Systems Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Hidehiro Yasuda
Affiliation:
[email protected], Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Get access

Abstract

We have synthesized the dendrimer-Au hybrid nanoclusters by solution routes, and have carried out the various spectroscopic studies in order to investigate their electronic structures. From the line-shape analyses for Au 4f core-level photoemission spectra measured with hard X-ray synchrotron-radiation of Au nanoclusters with mean diameter of 2-3 nm stabilized outside the dendrimer, it is found that Au 4f core-level photoemission spectrum consists of two components. We attribute these components to interior Au atoms and surface Au atoms bonded to dendrimers. In the valence-band photoemission spectrum of these Au nanoclusters, we have observed the bandwidth narrowing of Au 5d-derived band compared to that of bulk Au crystallite. Moreover, we have observed the characteristic spectral feature in the vicinity of Fermi level due to the dynamic final-state effect in photoemission. We have also carried out the optical spectroscopic measurements of these Au nanoclusters. From these results, we discuss the electronic structures and interfacial properties of the dendrimer-Au hybrid nanoclusters.

Keywords

nanostructureelectronic structureAu
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH03-55
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Viegers, M. P. A. and Trooster, J. M., Phys. Rev. B 15, 72 (1977).Google Scholar
2. Medeiros-Ribeiro, G., Ohlberg, D. A. A., Williams, R. S., and Heath, J. R., Phys. Rev. B 59, 1633 (1999).Google Scholar
3. Zheng, J., Zhang, C., and Dickson, R. M., Phys. Rev. Lett. 93, 077402 (2004).Google Scholar
4. Kim, Y.-G., Oh, S.-K., and R, M. Crooks, Chem. Mater, 16, 167 (2004).Google Scholar
5. Citrin, P. H., Wertheim, G. K., and Baer, Y., Phys. Rev. B 27, 3160 (1983).Google Scholar
6. Tanaka, A., Takeda, Y., Imamura, M., and Sato, S., Phys. Rev. B 68, 195415 (2003).Google Scholar
7. Bzowski, A., Sham, T. K., Watson, R. E., and Weinert, M., Phys. Rev. B 51, 9979 (1995).Google Scholar
8. Sham, T. K., Perlman, M. L., and Watson, R. E., Phys. Rev. B 19, 539 (1979).Google Scholar
9. Hovel, H., Grimm, B., Pollmann, M., and Reihl, B., Phys. Rev. Lett. 81, 4608 (1998).Google Scholar
10. Tanaka, A., Takeda, Y., Nagasawa, T., and Sato, S., Phys. Rev. B 67, 033101 (2003).Google Scholar