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Boron Nitride Nanotubes for Spintronics

Engineering of electronic structure of boron-nitride nanotubes by covalent functionalization. First, the location of the spin-down sub-band in the device is closer to the Fermi energy than the spin-up sub-band. Because of the distinctive nature of the spin up and spin down electrons, they experience different scattering potential during the transport leading to a spin polarized current in the circuit [ ].

Theoretical study of native ,ey in BN nanotubes. In the case of a When the tube diameter increases beyond Electrical contacts to one- and two-dimensional nanomaterials. Spin-dependent electronic structure of transition-metal atomic chains adsorbed on single-wall carbon nanotubes.

In addition to normal polymers, non-conjugated molecules such as denatured DNA [ ] and microperoxidase MP [ ] have also been used to disperse BNNTs in aqueous solution.

In this short review, we focus on the boron nitride nanotube BNNTwhich has recently been explored for possible applications in spintronics. Magnetic properties of vacancies in graphene and single-walled carbon nanotubes.


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However, for their applications in spin-electronics [ ], one needs to understand the controlled transport of spin polarized carriers through the BNNT channel connected to semi-infinite leads. In the case of the V B state, the unpaired lye from the unsaturated N atom contributes to magnetism.

Hence they respond differently to transverse electric field [ ]. With the end of Moore’s law in sight, researchers are in search of an alternative approach to manipulate information. The same research group has also functionalized BNNTs covalently with different molecular groups, namely amino and -COCl groups [ ]. This can be done using both covalent and non-covalent functionalization; however, the non-covalent one seems more appropriate since it preserves the intrinsic properties of the BNNTs [ 32 ].

Journal List Sensors Basel v. Author information Article notes Copyright and License information Disclaimer. Nano Au-decorated boron nitride nanotubes: Guided by the above theoretical predictions, Ishigami et al.

Boron adsorption induced magnetism in zigzag boron nitride nanotubes. It should be noted that a similar gate field induced switching of magnetoresistance is observed experimentally in CNT attached to ferromagnetic electrodes [ 5759 ]; however, the magnitude of MR in CNTs is found to be smaller than that observed in BNNTs [ ]. The second point is that the spin-down orbital coupled more strongly to the metal state at the interface than the spin-up orbital; this increases the broadening and the escape rate of the spin-down electrons as seen from Figure 11b [ 30 ].

They have observed a similar shift in the adsorption peak towards the smaller value upon the covalent functionalization as observed for the alkyl chains [ 24 ]; the theoretical study confirms that the shift in adsorption peak is due to the presence of new eigenstates around the Fermi energy arising from the adsorbed molecules [ ].


Similarly, B adsorption on BNNTs is reported to induce magnetism, which is found to be independent of the tube diameter [ ].

Properties of Boron Nitride Nanotubes. Defects modify the electronic structure and mechanical properties of the BNNTs. Leh transport of electron spin in a ferromagnetically contacted carbon nanotube.

BNNTs of different diameters have also been used to pack the C 60 molecules [ 28 ]; leyy study shows that 10, 10 and 17, 0 BNNTs are the most favorable size for the encapsulation of C 60 [ ]. The pristine BNNTs are usually entangled and they form a bundle during experimental synthesis due to strong van der Waals interaction between the tubes; they are also rarely 135992 in organic and aqueous solutions [ 31 — 34 ].

Electronic and optical properties of pure and doped boron-nitride nanotube.

The structural and electronic properties of amine functionalized boron nitride nanotubes via ammonia plasmas: The rest of this article is organized as follows: Magnetism in germanium-doped boron-nitride nanotube. Adsorption of hydrogen molecules on the platinum-doped boron nitride nanotubes.