CPO3D 66th example: enhancement factor for a random array of nanotubes all having the form of 'hemisphere on post'.

The 'posts' have a height h = 500nm and a radius a = 1nm. They are placed randomly inside a circle of radius 285.5nm, area 10*160nm*160nm, to create a field an anode is placed at an arbitrary 4 micron away, with a potential that gives a 'far field' of 1V/mm.

No symmetry planes are used.

A 'boundary plate' surrounds the top ends of the tubes, in the z = 0 plane, radius 285.5nm. The potential of this plate is V3 = 0.000123, which is aproximately the mean potential in the plane z = 0 in the region of the tubes (see xmpl3d65.dat). This potential is added to the anode potential to give the required far field. The value of V3 is determined iteratively to ensure that the potential above the central tube at (x,y,z) = (0,0,300nm) is approximately equal to that above the boundary plate at (0,1000nm,300nm).

The system is enclosed in a cylindrocal shield of radius 1000nm.

Please see the footnotes to the data file for a considerable amount of further information.

Please also see papers 55 and 59 in the publications list.