Figure 3.

Energy Dispersive X-ray Spectroscopy line scan verifying the presence of Ni in a 10 μm long and 660 nm diameter core-shell rod with a Ni deposition of 2.04 mC/mm². The tube length is approximately 4 μm, and tube thickness is 100 nm. At 4 μm into the scan, note the increase in Ni signal and decrease in Si signal. This change in material can also be seen in the SEM image; the Ni appears as a bright portion at the right end of the rod.