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Reaction Coupling Model

  • Chapter
Nonequilibrium Nondissipative Thermodynamics

Part of the book series: Springer Series in Chemical Physics ((CHEMICAL,volume 68))

Abstract

In 1990 Ji-Tao Wang and Jan-Otto Carlsson proposed the chemical pump model [5.1–5.6]. The key point of view of this model was the importance of inputting an external energy for steady diamond growth at low pressures. During activated diamond growth from the vapor phase at low pressure the external energy was carried into the system in the form of superequilibrium atomic hydrogen (SAH), which was atomic hydrogen in high concentration and hence with higher energy. Moreover, SAH inputted a kind of chemical energy selectively into a definite solid phase, so that the relative stabilities between solid phases (diamond and graphite) were changed. During the association of superequilibrium atomic hydrogen the energy was released in chemical form into the graphite phase, so that the chemical potential of carbon atoms of the graphite phase increased. This phenomenon was called a “chemical pump” effect. The chemical energy released during the association of superequilibrium atomic hydrogen changed graphite from a stable phase into a metastable phase, while diamond became a stable phase. That was the reason why diamond can grow steadily at activated low pressures.

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Authors and Affiliations

  1. Department of Microelectronics, Fudan University, 200433, Shanghai, China

    Professor Ji-Tao Wang

Authors
  1. Professor Ji-Tao Wang
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© 2002 Springer-Verlag Berlin Heidelberg

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Wang, JT. (2002). Reaction Coupling Model. In: Nonequilibrium Nondissipative Thermodynamics. Springer Series in Chemical Physics, vol 68. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-04829-0_5

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  • DOI: https://doi.org/10.1007/978-3-662-04829-0_5

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-07674-9

  • Online ISBN: 978-3-662-04829-0

  • eBook Packages: Springer Book Archive

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