2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128977Applying ac voltages, we trapped gold nanoparticles between microfabricated electrodes under well-defined conditions. We demonstrate that the nanoparticles can be controllably fused together to form homogeneous gold nanowires with pre-defined diameters and conductance values. Whereas electromigration is known to form a gap when a dc voltage is applied, this ac technique achieves the opposite, thereby completing the toolkit for the fabrication of nanoscale junctions.Nanotechnology 18, 235202 (2007)Mesoscale and Nanoscale Physicstext