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High Resolution Fesem Study of Au Particle Growth on TiO2

Published online by Cambridge University Press:  02 July 2020

F. Cosandey ,
L. Zhang  and
T. E. Madey
F. Cosandey
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ08855-0909
L. Zhang
Affiliation:
Department of Physics and Astronomy, Rutgers University, Piscataway, NJ08855-0909
T. E. Madey
Affiliation:
Department of Physics and Astronomy, Rutgers University, Piscataway, NJ08855-0909
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Extract

Transition metals supported on oxides have important catalytic properties and are also used in chemical gas sensors for increasing sensitivity and selectivity. In order to understand growth and reactivity in the Au/TiO2 system, we have performed surface studies on a model system consisting of ultrathin, discontinuous Au films on TiO2 (110) single crystals. In this paper we are presenting results obtained by high resolution scanning electron microscopy (HRSEM) on the effects of substrate temperature and average Au thickness on particle size, density and coverage.

The TiO2 (110) single crystal surfaces used in this study were prepared in UHV using surface science tools followed by in-situ Au deposition for different substrate temperatures and for various film thicknesses. After deposition, the samples were transferred in air to the Field Emission Scanning Electron microscope (LEO 982 Gemini) for high resolution imaging.

Typical high resolution scanning electron microscopy (HRSEM) images of Au films deposited at 300 K are shown in Fig. 1 for two film thicknesses of 0.22 and 1.0 nm.

Type
Nanocrystals and Nanocomposites: Novel Structures For Catalysis, Electronics, and Micromechanics
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 405 - 406
Copyright
Copyright © Microscopy Society of America 1997

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References

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