Fabrication of a 3D nanoscale crossbar circuit by nanotransfer-printing lithography.

Nanotransfer-printing lithography simplifies the fabrication of a 3D nanoscale crossbar circuit. Gold nanowires 100 nm in width and with 100 nm spacing are printed onto a polymer layer of electrically switchable, LiClO(4)-doped poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene] mixed with an epoxy. The transfer process can be repeated to obtain a multilayer nanoscale crossbar structure. This process paves the way toward fabricating 3D circuits with ultrahigh device density and neuromorphic architectures.