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Electromigration-based deposition (EMBD) is an additive nanolithography technology for the fabrication of three-dimensional (3D) nanostructures. Key techniques for extending the capability of EMBD have been tackled experimentally including the deposition against a non-conductive surface, shape control of the as-deposited nanostructure, and continuous mass feeding. The process is based on nanofluidic...
We report an experimental investigation into the controlled fabrication of metallic nanospheres on the tip of nanotubes. The fabrication process, nanobubbling, is based on nanofluidic mass delivery at the attogram scale using metal-filled carbon nanotubes (CNTs). Two methods have been investigated including electron-beam-induced bubbling (EBIB) and electromigration-based bubbling (EMBB). Under the...
Nanometer-scale plumbing systems that can transport attograms of material are no longer a pipe dream. Carbon nanotubes (CNTs), with their extremely strong mechanical strength and nanometer-sized hollow cores, are ideal candidates for nanochannels. Experimental setup for investigating the mechanisms of mass delivery is demonstrated in this article. Two Cu-filled CNTs supported on a sample holder and...
We report on structural changes induced in arc-grown multiwalled carbon nanotubes (MWNTs) due to ultrasonic agitation in an aqueous iron nitrate solution. The surface reconstructions were observed to follow three different pathways: (1) transformation from a tubular to a spherical / polyhedral onion-like geometry that involves a lower surface energy, (2) surface reconstruction of shells resulting...
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