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Title: Interaction of Ti with the (0001) surface of highly oriented pyrolitic graphite

Abstract

The nature of the interaction between highly oriented pyrolitic graphite (HOPG) and adsorbed Ti is examined by soft x-ray photoelectron spectroscopy. By monitoring the C 1s signal, it is found that Ti does not chemically bond to, but only interacts through the Van der Waals force with, a pristine HOPG surface. Time-dependent variations in the C 1s peak intensity are interpreted in terms of diffusion of adsorbed Ti atoms, which results in the formation of clusters. This behavior is further evidence for a weakly adsorbed overlayer and implies that this surface is {ital a priori} unable to support a layer-by-layer growth. A chemical reaction occurs only when oxygen is incorporated or defects are present. The presence of adatoms on HOPG has an effect on the screening process of the HOPG C 1s core hole, which can be detected even at the Van der Waals interaction level. This may be used as a measure of the strength of interfacial interactions, especially for cases of weak or small-scale interactions. {copyright} {ital 1999} {ital The American Physical Society}

Authors:
;  [1]
  1. Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
355452
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 60; Journal Issue: 4; Other Information: PBD: Jul 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GRAPHITE; TITANIUM; CHEMICAL BONDS; PHOTOELECTRON SPECTROSCOPY; ADSORBENTS; VAN DER WAALS FORCES; CHEMICAL REACTIONS; LAYERS; DIFFUSION; SURFACE PROPERTIES

Citation Formats

Ma, Q, and Rosenberg, R A. Interaction of Ti with the (0001) surface of highly oriented pyrolitic graphite. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.2827.
Ma, Q, & Rosenberg, R A. Interaction of Ti with the (0001) surface of highly oriented pyrolitic graphite. United States. https://doi.org/10.1103/PhysRevB.60.2827
Ma, Q, and Rosenberg, R A. 1999. "Interaction of Ti with the (0001) surface of highly oriented pyrolitic graphite". United States. https://doi.org/10.1103/PhysRevB.60.2827.
@article{osti_355452,
title = {Interaction of Ti with the (0001) surface of highly oriented pyrolitic graphite},
author = {Ma, Q and Rosenberg, R A},
abstractNote = {The nature of the interaction between highly oriented pyrolitic graphite (HOPG) and adsorbed Ti is examined by soft x-ray photoelectron spectroscopy. By monitoring the C 1s signal, it is found that Ti does not chemically bond to, but only interacts through the Van der Waals force with, a pristine HOPG surface. Time-dependent variations in the C 1s peak intensity are interpreted in terms of diffusion of adsorbed Ti atoms, which results in the formation of clusters. This behavior is further evidence for a weakly adsorbed overlayer and implies that this surface is {ital a priori} unable to support a layer-by-layer growth. A chemical reaction occurs only when oxygen is incorporated or defects are present. The presence of adatoms on HOPG has an effect on the screening process of the HOPG C 1s core hole, which can be detected even at the Van der Waals interaction level. This may be used as a measure of the strength of interfacial interactions, especially for cases of weak or small-scale interactions. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.60.2827},
url = {https://www.osti.gov/biblio/355452}, journal = {Physical Review, B: Condensed Matter},
number = 4,
volume = 60,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1999},
month = {Thu Jul 01 00:00:00 EDT 1999}
}