1.2 Definition of Surface Phase
3
Fig. 1.1 Definition of a surface phase [3]: a schematic variation of extensive property X as a
function of distance z across the interface region between bulk α (e.g., solid) and β (e.g., liquid)
phases contacted each other, b two-dimensional surface phase (σ phase) defined by the requirement
of surface discontinuity that the extensive property under consideration should maintain a uniform
value in each bulk phase up to the dividing surface (perpendicular line: DS) and the net value of
extensive property corresponding to the areas with plus sign (β phase) and minus sign (α phase)
is fixed as a surface excess of the extensive property at the dividing surface [1], and c surface
phase defined as a three-dimensional phase (π phase) with a thickness of τ [2]. Modified from [3],
Copyright 2012, Springer, Berlin Heidelberg, with permission from Springer Nature
3
Fig. 1.1 Definition of a surface phase [3]: a schematic variation of extensive property X as a
function of distance z across the interface region between bulk α (e.g., solid) and β (e.g., liquid)
phases contacted each other, b two-dimensional surface phase (σ phase) defined by the requirement
of surface discontinuity that the extensive property under consideration should maintain a uniform
value in each bulk phase up to the dividing surface (perpendicular line: DS) and the net value of
extensive property corresponding to the areas with plus sign (β phase) and minus sign (α phase)
is fixed as a surface excess of the extensive property at the dividing surface [1], and c surface
phase defined as a three-dimensional phase (π phase) with a thickness of τ [2]. Modified from [3],
Copyright 2012, Springer, Berlin Heidelberg, with permission from Springer Nature