Boron Carbonitride Carbon Nanotube Junction

Guo et al. [156] found a method to fabricate boron car-bonitride nanojunctions by bias-assisted hot-filament chemical vapor deposition with a pause-reactivation two-stage process. They fabricated BCN nanotubes on polycrystalline nickel substrate by bias-assisted hot-filament chemical vapor deposition. A mixture of high-purity N2, H2, CH4, and B2H6 is utilized as the precursors. The composition of the BCN nanotubes is controlled simply by varying the flow rate of B2H6. This method results in a sharp interface structure and composition. A similar approach was used to synthesize CNx/carbon nanotube junctions by using microwave chemical vapor deposition of N2/CH4 and H2/CH4 [157].

Figure 14. A TEM image showing a nanojunction between SiC nanorod and SWNT bundle. A clean interface was observed. Reprinted with permission from [8], Y. Zhang et al., Science 285, 1719 (1999). © 1999, American Association for the Advancement of Science.

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Figure 15. TEM images showing nanojunctions between TiC nanorod and SWNT bundle (a) and a single SWNT (b). (c) shows the I-V curves of SWNTs crossing two Ti pads before (dotted line) and after (solid line) vacuum annealing. The improvement of the conductivity is attributed to the formation of Ti-TiC-SWNT junctions. Reprinted with permission from [8], Y. Zhang et al., Science 285, 1719 (1999). © 1999, American Association for the Advancement of Science.

Figure 14. A TEM image showing a nanojunction between SiC nanorod and SWNT bundle. A clean interface was observed. Reprinted with permission from [8], Y. Zhang et al., Science 285, 1719 (1999). © 1999, American Association for the Advancement of Science.

Figure 15. TEM images showing nanojunctions between TiC nanorod and SWNT bundle (a) and a single SWNT (b). (c) shows the I-V curves of SWNTs crossing two Ti pads before (dotted line) and after (solid line) vacuum annealing. The improvement of the conductivity is attributed to the formation of Ti-TiC-SWNT junctions. Reprinted with permission from [8], Y. Zhang et al., Science 285, 1719 (1999). © 1999, American Association for the Advancement of Science.

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