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Spectroscopic Characterization of Alkyl-Passivated Si Nanoparticles Synthesized by a Solution Route

Published online by Cambridge University Press:  01 February 2011

Akinori Tanaka ,
Tadafumi Kamikake ,
Masaki Imamura ,
Yoshiaki Murase  and
Hidehiro Yasuda
Akinori Tanaka
Affiliation:
a-tanaka@mech.kobe-u.ac.jp, Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan, +81-78-803-6123, +81-78-803-6123
Tadafumi Kamikake
Affiliation:
057t367n@y05.kobe-u.ac.jp, Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Masaki Imamura
Affiliation:
032d811n@stu.kobe-u.ac.jp, Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Yoshiaki Murase
Affiliation:
062t411n@stu.kobe-u.ac.jp, Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
Hidehiro Yasuda
Affiliation:
yasuda@mech.kobe-u.ac.jp, Kobe University, Department of Mechanical Engineering, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
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Abstract

We have synthesized the alkyl-passivated Si nanoparticles by a solution route, and have carried out the various spectroscopic studies in order to investigate their intrinsic optical properties, electronic structures, and surface chemistry. Photoluminescence (PL) spectra of the n-butyl-passivated Si nanoparticles with mean diameter less than 2 nm exhibit the strong ultraviolet-blue emission. Moreover, it is found that their valence-band maximum energies directly estimated from the synchrotron-radiation valence-band photoemission spectra correspond to the resonance features in the PL excitation spectra. Therefore, it is concluded that the PL from the present n-butyl-passivated Si nanoparticles originates from the electron-hole pair recombination between the modified valence-band and conduction-band due to the quantum size effect. From the synchrotron-radiation Si 2p core-level photoemission spectra, their interfacial electronic structures of these Si nanoparticles have also been characterized. From these results, we discuss the detailed electronic and chemical properties of alkyl-passivated Si nanoparticles.

Keywords

electronic structureSinanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 958: Symposium L – Group IV Semiconductor Nanostructures—2006 , 2006 , 0958-L10-29
Copyright
Copyright © Materials Research Society 2007

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References

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