  Free-standing, interconnected metallic nanowire networks with density as low
as 40 mg/cm^{3} have been achieved over cm-scale areas, using electrodeposition
into polycarbonate membranes that have been ion-tracked at multiple angles.
Networks of interconnected magnetic nanowires further provide an exciting
platform to explore 3-dimensional nanomagnetism, where their structure,
topology and frustration may be used as additional degrees of freedom to tailor
the materials properties. New magnetization reversal mechanisms in cobalt
networks are captured by the first-order reversal curve method, which
demonstrate the evolution from strong demagnetizing dipolar interactions to
intersections-mediated domain wall pinning and propagation, and eventually to
shape-anisotropy dominated magnetization reversal. These findings open up new
possibilities for 3-dimensional integrated magnetic devices for memory, complex
computation, and neuromorphics.
