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Photoexcited Carrier Effect on Imaging of Organic Molecules On Si(100)2×l Surfaces

Published online by Cambridge University Press:  10 February 2011

Y Maeda ,
T Matsumoto  and
T. Kawaj
Y Maeda
Affiliation:
The institute of Scientific and Industrial Research, Osaka University, 8–1 Mihokaoka, Ibaraki, Osaka 567, Japan
T Matsumoto
Affiliation:
The institute of Scientific and Industrial Research, Osaka University, 8–1 Mihokaoka, Ibaraki, Osaka 567, Japan
T. Kawaj
Affiliation:
The institute of Scientific and Industrial Research, Osaka University, 8–1 Mihokaoka, Ibaraki, Osaka 567, Japan
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Abstract

Photocurrent images of zinc-phthalocyanine (ZnPc) and coronene molecules adsorbed on Si(100)2×1 surface have been obtained by scanning tunneling microscopy. The ZnPc molecules are observed as bright images indicating large local density of state (LDOS) at the bias voltage. However, coronene molecules show wide variety of contrast in their images. This difference is the result of variations of LDOS on molecules which are attribute to the difference of energy gap between highest occupied and lowest unoccupied molecular orbitals

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 466: Symposium G – Atomic Resolution Microscopy of Surfaces and Interfaces , 1996 , 173
Copyright
Copyright © Materials Research Society 1997

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References

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