3. Results and discussion
An SEM micrograph at low magnification, Fig. 1a, shows the bulk mass obtained after the treatment, where agglomerates can be seen. At relatively higher magnification (Fig. 1b), the agglomerates revealed into Al coated nanotubes (arrows), needle like chemical phases (circle) and clusters of Al and the nanotubes (rectangle). Fig. 1c shows the isolated coated nanotubes having around 100 nm diameter; the increase in diameter occurred due to thick Al coating. The nanotubes’ surfaces were fully covered with Al and demonstrated appreciable wetting. An EDS spectrum AG 1879 shown in Fig. 1d, which represents the elemental analysis of the coated CNT (marked region) in Fig. 1c.
Fig. 1. (a) Bulk mass of the treated mixture showing agglomeration, (b) a higher magnification SEM micrograph showing Al coated nanotubes (arrows), needle like chemical phases (circle) and clusters of Al and the nanotubes (rectangle), (c) at some isolated regions, individual coated CNTs are prenatal testing also observable and (d) EDS spectrum of the marked region in (c), the coated CNT consisted of small amount of titanium along with aluminum and carbon.Figure optionsDownload full-size imageDownload as PowerPoint slide