Patent ID: 7781350

Claim:
A method for controllable deposition of nanoparticles on a substrate, comprising the steps of: patterning said substrate to create at least one p-doped and at least one n-doped regions thereon, at least one pn junction being established therebetween; generating a vapor containing a plurality of nanoparticles; charging said nanoparticles for imposing a predetermined polarity on said plurality of nanoparticles; projecting said vapor toward said substrate for depositing said charged nanoparticles thereon; and applying an electric field to said at least one pn junction during said deposition of nanoparticles for selectively controlling said plurality of nanoparticles in depositing position on respective ones of said p-doped and n-doped regions, depending on the predetermined polarity of said plurality of nanoparticles.