CHEMISORPTION OF L-CYSTEINE ON Au(111)/Si(111) AND $Si(111)\sqrt{3} \times \sqrt{3}-{\rm Au}$ SURFACES
The electronic structures of L-cysteine adsorbed on Au(111)/Si(111) and $Si(111)\sqrt{3} \times \sqrt{3}-{\rm Au}$ surfaces were studied by using X-ray photoelectron spectroscopy (XPS). L-cysteine multilayers on Au(111)/Si(111) and $Si(111)\sqrt{3} \times \sqrt{3}-{\rm Au}$ surfaces were prepared under UHV condition. L-cysteine monolayers were obtained by annealing such multilayer sample up to 130°C. In the case of the Au(111)/Si(111) surface, we observed no chemical shift and no change in the peak intensity ratios among C1s, N1s, O1s and S 2p before and after annealing. On the other hand, the component attributed to COOH group in C1s spectra decreased after annealing. In addition, O1s XPS spectra of monolayer on the $Si(111)\sqrt{3} \times \sqrt{3}-{\rm Au}$ surface was composed of two distinct peaks, which indicates that there are two kinds of O atoms in different conformations. These observations indicate that the COOH group adsorbs directly to a surface atoms and dissociate by the interaction with the substrate Si(111) trimer atoms.
Year of publication: |
2006
|
---|---|
Authors: | HONDA, MITSUNORI ; MATSUI, FUMIHIKO ; DAIMON, HIROSHI |
Published in: |
Surface Review and Letters (SRL). - World Scientific Publishing Co. Pte. Ltd., ISSN 1793-6667. - Vol. 13.2006, 02, p. 197-200
|
Publisher: |
World Scientific Publishing Co. Pte. Ltd. |
Subject: | L-cysteine | Au(111)/Si(111) | $Si(111)\sqrt{3} \times \sqrt{3}-{\rm Au}$ | XPS | semiconductor |
Saved in:
Online Resource
Saved in favorites
Similar items by subject
-
ELECTROCHEMICAL BEHAVIORS OF MATRINE AT L-CYSTEINE-MODIFIED ELECTRODES
MIAO, YUQING, (2008)
-
THE ADSORPTION AND DESORPTION OF OXYGEN ON CdZnTe (111)B-(2 × 2) SURFACE
BAI, XUXU, (2013)
-
BERA, PARTHASARATHI, (2014)
- More ...
Similar items by person