Top-surface characterization of a near-frictionless carbon film.

Journal Article · Thu Feb 01 04:00:00 EST 2007 · Diamond Related Mater.

DOI:https://doi.org/10.1016/j.diamond.2006.05.005· OSTI ID:935626

Johnson, J A; Holland, D; Woodford, J B; Zinovev, A; Gee, I A; Eryilmaz, O L; Erdemir, A

A detailed study of the top surface ({approx}2 nm) of a near frictionless carbon film has revealed new information with respect to the sp{sup 3} fraction. Previous work on near frictionless carbon films made at Argonne had shown a large fraction of sp{sup 2}-hybridized carbon in the bulk of the film. However, in this study of the surface, the majority of the carbon was found to be sp{sup 3}. In addition we compared and contrasted the behavior of the films after mechanical abrasion and Ar{sup +} etching. The study also revealed that oxygen on untreated samples was rapidly reduced by etching or heating or mechanical abrasion; this finding was corroborated by an angle-resolved study, where different depths of the sample were probed. It was also found that the fraction of sp{sup 3} carbon decreased linearly with depth, falling in one film from {approx}90% sp{sup 3} to {approx}80% sp{sup 3} in the top 2 nm.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 935626
• Report Number(s): ANL/ET/JA-56617
• Journal Information: Diamond Related Mater., Journal Name: Diamond Related Mater. Journal Issue: 2 ; Feb. 2007 Vol. 16
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ABRASION
CARBON
ETCHING
FILMS
FRICTION
HEATING
SURFACE PROPERTIES