![Spectroscopy-and-Chemical-Analysis.jpg](/thumb/fba6a1c777fb09ab80bc05299b2bee9c/assets/img/images/6686/w500/eacc019d-1193-4b51-abef-b1889f45ab92.jpg)
TEM image (left) and energy filtered TEM (EFTEM) image (right) of Fe and Co nanowires and Fe3O4 nanotubes showing distribution of Fe, oxygen and carbon in the sample.
![Spectroscopy-and-Chemical-Analysis2.jpg](/thumb/2baf6ef92e17877110ada586d598ff7c/assets/img/images/6686/w500/20518329-65fc-4c4d-a9c4-5d62752f8699.jpg)
HAADF-STEM image (left) of carbon-coated SnO2 whiskers and STEM-EELS elemental maps of Sn, Cu and C (right).