Answers are grounded in this paper and cite their sources.
A matter of control: Metallic, self-assembled nanoliter containers have been prepared that can be remotely guided in any chosen spatial trajectory by a magnetic field, as well as remotely triggered by radio-frequency electromagnetic fields to release chemical reactants (see picture). The containers were utilized to facilitate, on demand, spatially localized microfabrication in a capillary and non-invasive chemical delivery to living cells.
No takes yet. Share an insight, caveat, or question.
Ye et al. (2007) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: