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Chemisorption with partial charge transfer on semiconductor surfaces: Adsorption equilibrium and adsorption isotherms

1982; Elsevier BV; Volume: 114; Issue: 2-3 Linguagem: Inglês

10.1016/0167-2584(82)90024-x

1878-1047

Wolfgang Lorenz, C. Engler,

Quantum Dots Synthesis And Properties

Abstract In this paper we outline the statistical-thermodynamical expression of the adsorption equilibrium and of the adsorption isotherm in the limit of non-interacting adsorbates (low and medium coverage), for chemisorption processes with partial charge transfer on semiconductor surfaces. As recently shown, chemisorption-induced partial charge injection together with the charge balance of the semiconductor surface and space charge layer causes a strong coverage dependence of the adsorption energy. These factors determine likewise the form of the CT-adsorption isotherm. The relations of CT-adsorption equilibrium to quantumchemical data on surface densities of states are discussed.