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Volumn 102, Issue 52, 1998, Pages 10799-10804

Kinetics of graphite oxidation: monolayer and multilayer etch pits in HOPG Studied by STM

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Indexed keywords


EID: 0000726390     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp982025e     Document Type: Article
Times cited : (94)

References (42)
  • 12
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    • personal communication
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    • Walker, P. L., Jr. Ed.; Marcel Dekker: New York
    • Thomas, J. M.; Roscoe, C. In Chemistry and Physics of Carbon; Walker, P. L., Jr. Ed.; Marcel Dekker: New York, 1968; Vol. 3, pp 1-44.
    • (1968) Chemistry and Physics of Carbon , vol.3 , pp. 1-44
    • Thomas, J.M.1    Roscoe, C.2
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    • Hennig, G. R. Science 1965, 147, 733-734.
    • (1965) Science , vol.147 , pp. 733-734
    • Hennig, G.R.1
  • 24
    • 33645893665 scopus 로고    scopus 로고
    • note
    • The Z piezo was calibrated by measuring the height of many monolayer HOPG steps. A histogram of these measurements showed a peak centered at 3.44 A, but with considerable breadth (a = 1 A), possibly due to varying amounts of sample compressibility.
  • 25
    • 33645840043 scopus 로고    scopus 로고
    • note
    • At 725 C and below no new monolayer pits formed during oxidation, while at 800 C some new pits did form during oxidation. This was insignificant for shorter etch times (1 and 2 min), but for the longest etch time (3 min) only the largest one-third of the observed monolayer etch pits were used in calculations.
  • 27
    • 33645890166 scopus 로고    scopus 로고
    • note
    • Yang14 used a formula of reactions per edge carbon per second = 0.938-dr/d; (dr/df = rate of change in pit radius in A-s"'). Using slightly different methods, we derived a similar formula of 0.763-dr/d; (this value is partly dependent on the value chosen for edge atoms per unit perimeter, which depends on the details of the edge geometry).
  • 32
    • 33645860081 scopus 로고    scopus 로고
    • note
    • Often in calculations such as this, only the kinetic energy normal to the surface is considered, since "glancing" collisions deliver little energy to a flat surface.42 In the present case, reaction occurs at step edges, rather than at a flat surface, so collisions need not be normal to the surface to be effective. Since explicit treatment of this issue is geometry dependent, we chose to use the total number of collisions. Including this geometry term would only lower the predicted reaction rate, further widening the gap between experimental and predicted values.
  • 34
    • 11744266614 scopus 로고
    • Saltsburg, H., Smith, J. N., Jr., Rogers, M., Eds.; Academic Press: New York
    • Spokes, G. N.; Benson, S. W. In Fundamentals of Gas-Surface Interactions; Saltsburg, H., Smith, J. N., Jr., Rogers, M., Eds.; Academic Press: New York, 1967; pp 318-329.
    • (1967) Fundamentals of Gas-Surface Interactions , pp. 318-329
    • Spokes, G.N.1    Benson, S.W.2
  • 35
    • 33645894091 scopus 로고
    • Oxidation kinetics of pyrolytic graphite
    • Pergamon: New York
    • Horton, W. S. Oxidation kinetics of pyrolytic graphite. Proceedings of the Fifth Carbon Conference; Pergamon: New York, 1962; pp 233241.
    • (1962) Proceedings of the Fifth Carbon Conference , pp. 233241
    • Horton, W.S.1
  • 37
    • 0021560839 scopus 로고
    • Thrower, P. A., Ed.; Marcel Dekker: New York
    • Yang, R. T. In Chemistry and Physics of Carbon; Thrower, P. A., Ed.; Marcel Dekker: New York, 1984; Vol. 19, pp 163-210.
    • (1984) Chemistry and Physics of Carbon , vol.19 , pp. 163-210
    • Yang, R.T.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.