STM-Induced Luminescence for Alkanethiol Films on Au(111) Surface

• Authors: R. Nishitani , Y. Tateishi , H. Arakawa , A. Kasuya , K. Sumiyama
• Languages of publication: EN

Abstracts

EN

STM-induced luminescence spectra for organic molecule adsorbed Au(111) surfaces were studied, and the influence of STM-tip alloy material on the emission spectra was measured. We observed the STM-tip dependent emission spectra of Au(111). The characteristics of the spectra with Pt-Ir alloy(20%) tip are interpreted in terms of the one-mode type and two-mode type depending on the composition rates. We measured the emission spectra for two different types of molecules, decanethiol and octanedithiol, which have different adsorption structures. The emission spectra for the octanedithiol films were compared with the spectra from clean gold films and the decanethiol films. A spectral change of Au(111) due to adsorption of octanedithiol molecules on Au(111) was observed in the spectral range from 700 through 780 nm while not for the adsorption of decanethiol molecules. The spectral change due to adsorption of octanedithiol molecules is compared with the STS measurements.

Keywords

EN

68.37.Ef; 73.20.Mf; 78.68.+m; 68.43.Hn

Discipline

• 78.68.+m: Optical properties of surfaces
• 73.20.Mf: Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)(for collective excitations in quantum Hall effects, see 73.43.Lp)
• 68.43.Hn: Structure of assemblies of adsorbates (two- and three-dimensional clustering)
• 68.37.Ef: Scanning tunneling microscopy (including chemistry induced with STM)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2003
• Volume: 104
• Issue: 3-4
• Pages: 269-279

Dates

published

2003-09/10

received

2003-07-16

Contributors

author

R. Nishitani

• Dept. of Electrical and Electronics Engineering, Univ. of the Ryukyus, Okinawa 903-0213, Japan

author

Y. Tateishi

• Dept. of Computer Sciences and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan

author

H. Arakawa

• Dept. of Computer Sciences and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan

author

A. Kasuya

• Center for Interdisciplinary Research, Tohoku Univ., Aoba-ku, Sendai 980-8578, Japan

author

K. Sumiyama

• Dept. of Materials Science and Engineering, Nagoya Institute of Technology, Showa-ku, Nagoya 466-8535, Japan

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Identifiers

DOI

10.12693/APhysPolA.104.269