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Spectroscopic characterization of Stone-Wales defects in nanotubes. The change in sign of J is attributed to the electric field-induced modification of magnetic exchange interactions at the interface [ ] see the inset of Figure 10d caused by the Stark effect [ 55 ].

Structure and mechanical flexibility of carbon nanotube ribbons: Boron adsorption induced magnetism in zigzag boron nitride nanotubes.

Unlike many organic materials, BNNTs offer higher thermal stability and higher resistance to oxidation. Band structures results presented here are obtained using density functional theory; the generalized gradient approximation GGA with the PW91 functional for the exchange-correlation is used. Defects in Carbon Nanotubes.

Magnetic properties of Carbon Structures. Optical properties of multiwall boron nitride nanotubes. Though thus far there is no experimental demonstration of TMR in BNNTs, it is expected that this theoretical study [ ] will initiate new experimental effort towards its verification.

The bias range from 0 to 2 V is considered. When an adsorbate affects strongly the hybridization at the adsorption sites in a host, the functionalization is referred to as covalent functionalization or chemisorption [ 3261 ]; electronic structure modification is relatively stronger in such covalent functionalization.

Very recently, Wei et al. Noncovalent functionalization of boron nitride nanotubes using water-soluble synthetic polymers and the subsequent preparation of superhydrophobic surfaces. In the case of the V B state, the unpaired electron from the unsaturated N atom contributes to magnetism.

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Though the effect of the hyperfine interaction [ 47 ] arising from the interaction of nuclear and electronic spins cannot be ignored in spin dephasing, the weak spin-orbit interaction in BNNT provides an important advantage for its application in spintronics; the spin-orbit interactions [ 47 ] scale as Z 4where Z is the atomic number, so low Z materials like B and N have weaker spin-orbit interactions.

For example, Wang et al. Theoretical study on interaction of hydrogen with single-walled boron nitride nanotubes. 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. Author information Article notes Copyright and License information Disclaimer. The structural and electronic properties of amine functionalized boron nitride nanotubes via ammonia plasmas: Conductance modification and field-emission enhancement.

Giant amplification of tunnel magnetoresistance in a molecular junction: Functionalization even reduces the work function of BNNTs significantly, which facilitates the field electron emission from the tube surface [ ]. Electric field control of spin transport. Ab initio theoretical study of non-covalent adsorption of aromatic molecules on boron nitride nanotubes.

Boron Nitride Nanotubes for Spintronics

Synthesis, characterization and theory. Magnetic properties of vacancies in graphene and single-walled carbon nanotubes. Structural, electronic and magnetic properties of the 3d transition metal atoms adsorbed on boron nitride nanotubes. Electronic and optical properties of pure and doped boron-nitride nanotube. The large electronic band gap and the challenges involved in synthesizing BNNTs have been the sole cause for its 13952 progress.

For a higher coverage of F 8. Similarly, B adsorption on BNNTs is reported to induce magnetism, which is found to be independent of the tube diameter [ ].

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Boron Nitride Nanotubes for Spintronics

Abstract With the end of Moore’s law in sight, researchers are in search of an alternative approach to manipulate information. Nanocables made of a transition metal wire and boron nitride sheath: Electronic and optical properties of boron nitride nanotubes. Conflicts of Interest The authors declare no conflict of interest. Published online Sep F-BNNT has also been found to exhibit long range ferromagnetic spin ordering [ 3042 ]. The phenomena of spin-filter tunnelling.

In addition, various other molecules, such as CO [ ], H 2 [ ], isoniazid INH [ ], metalloporphyrins [ ], and 2,4,6-trinitrotoluene [ ], have also been explored for non-covalent functionalization of BNNTs. Unlike the electronic properties of CNTs, which depend upon the chiral indices m, nthe electronic properties of BNNTs are found to be independent of chirality [ 5 ]. Recently, using a simple scheme that involves strong oxidation of BNNT with nitric acid, followed by silanization of the surface using 3-aminopropyltriethoxysilane APTES molecules, researchers have successfully demonstrated chemical linking of amino groups to the BNNT surface Figure 5 [ ].

It should be noted that band gap modulation and conductivity enhancement upon application of radial strain are being reported in semiconducting CNTs [ 92 — 95 ]. Very recently, Ghassemi et al. The schematic junction structures of BNNT-based spin valve ely for the P and the AP spin configurations 15392 shown in the insets of Figure 10a,b. Tuning the electronic and magnetic properties of boron nitride nanotubes.