In the same aspect as some of my previous questions, I am interested in modeling molecules on different surfaces and to study the interfacial effect on them.
One of the most important problems that one can face in such aspect is how to create an initial guess of randomly oriented and distributed molecules over the material surface.
While it is relatively easy to calculate a single molecule on a surface and, if necessary, use Periodic Boundary Conditions to replicate such unit in the material plane, I am not aware in what is the best option to create a much denser 'packing' in a randomized distribution.
Any idea about software or methodology to set this initial structure?