LEY 13592 PDF

COLE, Mr Ian Richard LEWIS, Councillor Andrew Ms LEY Councillor Holmes Councillor Mitchell HOLMES, Councillor John Ms LIVERMORE. UNLP (Universidad Nacional de La Plata) – ONG Nuevo Ambiente – La Agencia Ambiental La Plata – Ley Aliados estratégicos. 2s Ley da Annali & Istoriedi Corn. Tacito, tradotte Filli di Sciio di Bonarelli, cum Jig. corio turcico, filiis deaur. zs od.. ib. S

Author: Mazilkree Nalmaran
Country: Australia
Language: English (Spanish)
Genre: Personal Growth
Published (Last): 8 August 2007
Pages: 409
PDF File Size: 19.94 Mb
ePub File Size: 13.57 Mb
ISBN: 517-5-76958-256-2
Downloads: 62199
Price: Free* [*Free Regsitration Required]
Uploader: Daikasa

Experimental identification of p-type conduction in fluoridized boron nitride nanotube. A theoretical study of silicon-doped boron nitride nanotubes serving as a potential chemical sensor for hydrogen cyanide.

Electronic and optical properties of pure and doped boron-nitride nanotube. For example, using a first-principles approach, Kim and colleagues have studied the electronic structure modulation for both zigzag 9, 0 and armchair 5, 5 BNNTs under the radial deformation [ 23 ]. Systematic ab initio study of the optical properties of BN nanotubes. Experimentally, radial deformation can be employed in NTs by pressing them between the AFM tip and the substrate, as shown in the Figure 3 [ 87 ].

The effect of external strain depends upon the elastic properties of the materials. 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 [ ].

Campaña de marketing social del Hospital de Niños Sor María by Agostina Mariela on Prezi

Metal particle catalysed production of nanoscale BN structures. Optical spectra of single-walled boron nitride nanotubes. Half-metallic ferromagnetism in transition-metal encapsulated boron nitride nanotubes. In principle, the channel or semi-infinite ldy can be either magnetic or non-magnetic. When the tube diameter increases beyond A spin filter allows all majority or minority spin carriers to pass through the channel while blocking the minority or majority spin carriers, which requires splitting of spin components.

Electronic and optical properties of boron nitride nanotubes. BNNTs and CNTs are rigid along leh tube axis, but they leyy highly flexible along the perpendicular direction of the tube axis and have very high Young’s modulus values [ 238586 ]. Different materials such as organic and inorganic nanostructures are explored for possible applications in spintronics.


Soon after its prediction, it was successfully synthesized by the arc discharge method [ 3 ]. A solid-state process for formation leg boron nitride nanotubes. The physical and chemical properties of heteronanotubes.

Magnetism in different ely free sp materials has been reported recently both theoretically and experimentally [ 4546 ]. A density functional theory study. Defects modify the electronic structure and mechanical properties of the BNNTs. Electronic structure of radially deformed BN and BC3 nanotubes. Nanospintronics with carbon nanotubes. The range of applications of BNNTs would substantially increase if the band gap can be tuned to a desirable value in a controlled manner. Unlike many organic materials, BNNTs offer higher thermal stability and higher resistance to oxidation.

As a result, the bottom of the conduction band moves down and top of the valance band moves up, causing a reduction in the band gap of BNNTs [ 21 ]. Structural, electronic and magnetic properties of the 3d transition metal atoms adsorbed on boron nitride nanotubes. The physics of boron nitride nanotubes. This observed large band gap and the lack of experimental control in synthesizing BNNTs initially dissuaded researchers from working in this field.

Boron Nitride Nanotubes for Spintronics

There are no reports on magnetism due to SW defects. Recent advancements in boron nitride nanotubes. In the following section, we briefly discuss these techniques. The adsorptions of these different atoms and molecules introduce impurity states within the band gap of BNNT [ 43, — ]. Similarly, B adsorption on BNNTs is reported to induce magnetism, which is found to be independent of the tube diameter [ ]. Nanoparticle-decorated BNNTs [ — 135922 have been explored for conductance enhancement, modification of field emission behavior [ ] and designing room temperature tunneling field effect transistors 13529 4 [ ].

Di-vacancies on the ly hand do not induce magnetization in BNNTs [ ]. Surface-initiated atom transfer radical polymerization of glycidyl methacrylate and styrene from boron nitride nanotubes. Reversible band-gap engineering in carbon nanotubes by radial deformation.


Functionalization of BNNTs can be done in two ways, namely covalent chemisorption key non-covalent physisorption functionalization [ 61 ]. The different responses of BNNTs and semiconducting CNTs to the transverse electric field are attributed to their different bonding features.

Phases and crystallization of encapsulated cobalt nanorods inside BN nanotubes. Optical evidence of Stark effect in single-walled carbon nanotube transistors. Mechanically induced defects and strength of BN nanotubes. An applied bias drives the electrons from source to drain via the channel, where the electrons are lye polarized and experience different scattering potentials, leading to a spin polarized current in the circuit.

Later, using ammonia plasma irradiation, BNNT surface functionalization with amine groups has been reported [ ]. Theory of graphitic boron nitride nanotubes. Recently, different types of aromatic molecules have been used to functionalize BNNTs non-covalently [] for possible applications in field effect transistors; thus, adsorption of an electrophilic nucleophilic molecule on BNNTs makes them p-type n-type semiconductors.

Ab initio theoretical study of non-covalent adsorption ,ey aromatic molecules on boron nitride nanotubes. Engineering of electronic structure of boron-nitride nanotubes by covalent functionalization.

farmagenesis s.a.

Transformation from chemisorption to physisorption with tube diameter and gas concentration: BNNTs are also being explored for possible application in nanomechanical sensors and actuators. Molecular dynamics simulation of C60 encapsulated in boron nitride nanotubes. Magnetism in BNNTs arising from the unsaturated dangling bonds at the open end of the tube has also been reported [ 44 ]; the observed magnetism is strong and is not affected much by external perturbations, such as strong electric fields and doping.

Conductance modification and field-emission enhancement. Tuning the electronic and magnetic properties of boron nitride nanotubes.