Electromagnetic field assisted self-assembly with formation of electrical contacts

A method of self-assembling a part on a substrate, comprising:

• placing a substrate into a first fluid, the substrate including a first binding site capable of generating a first electromagnetic field and having a first shaped surface with a first droplet conformably disposed on the first shaped surface, wherein the second fluid is immiscible in the first fluid;
• placing a part into the first fluid, the part having a second binding site capable of generating a second electromagnetic field and having a second shaped surface with a second droplet conformably disposed on the second shaped surface, wherein the second droplet is immiscible in the first fluid;
• and
• attracting the part towards the first binding site using the first and second electromagnetic fields such that the first and second droplets solubilize with each other forming an equilibrium between an attractive force between the first and second electromagnetic fields and a repulsive force between the solubilized first and second droplets and the first fluid such that the part is free to rotate about the first binding site to minimize the repulsive force by minimizing an exposed surface area of the solubilized first and second droplets with respect to the first fluid when the first and second shaped surfaces rotate into an alignment causing the part to aligned with the first binding site.