Sphere segment voids

J.J., and Bartlett, P.N. (2009) Relating SERS intensity to specific plasmon modes on sphere segment void surfaces. Journal of Physical Chemistry C, 113, 9284-9289. 

Figure 2. A Delaunay cell within the Finney pack is a tetrahedron that groups together four nearest neighbor spheres. Each apex of the tetrahedron (labeled S, T, U, V) is the center of a sphere. Only the segments of the spheres contained within the cell are shown the rest of each sphere is contained in adjacent cells. The void area in each face of the cell is a local minimum in cross-section and thus controls access of the meniscus between nonwetting and wetting phases into the cell volume. The center of the throat in face TUV is labeled W, and the center of the pore body is labeled X.

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