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. 2014 Nov 3;4:6883. doi: 10.1038/srep06883

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(a) FESEM image of carbon-filled Ge MF-on-NS hybrids. HAADF STEM images at (b) low magnification and (c) high magnification. The empty space in the Ge MF-on-NS hybrids is completely filled with carbon. Representative EDS spectra with HAADF STEM images obtained from points (d) #1, (e) #2, and (f) #3. The EDS spectra corresponding to point #3 indicate the presence of carbon. It is clear that the amorphous sheath consisted mainly of carbon.