Solubilization of boron nitride nanotubes

Xie, Su‐Yuan; Wang, Wei; Fernando, K. A. Shiral; Wang, Xin; Lin, Yi; Sun, Ya‐Ping

doi:10.1039/b505330g

Cited by 202 publications

(160 citation statements)

References 30 publications

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“…This change in color readily suggests an evidence of change in chemical environment of BNNT sample due to functionalization. A similar result was obtained by Xie and co-workers [16] for BNNTs functionalized with amine-terminated oligomeric poly(ethyleneglycol). Fig.…”

Section: -Visual Sem and Tem Characterization Of The Bnnts After Thesupporting

confidence: 73%

Simple, Economical, Scalable and Sustainable Route for Functionalization BNNTS

Sousa¹,

Meireles²,

Andrada³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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Boron nitride nanotubes (BNNTs) were synthesized at 1150 °C under atmosphere of NH3/N2 gas by chemical vapor deposition (CVD) technique. A simple mechanical method (ball milling in the presence of urea) is proposed for functionalization of BNNTs. FTIR results indicate that amine functional groups (N-H and -NH2) were introduced on the nanotubes and the X-ray photoelectron spectroscopy showed that the obtained values for the B:N rates are slight different which may be an indication of the functionalization occurrence. TEM and MEV images after ball milling showed an evidence of small fragments of tubular particles by the parallel fringes corresponding to multiple stacked layers of h-BN sheets. Successful of functionalization of the BNNTs structure was evidenced by stability of the dispersions in water, DMF and acetone. Additionally, the result suggests that the amino termination of the functionalized BNNTs makes it possible to covalently bond to polymers for manufacturing nanocomposites.

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Section: -Visual Sem and Tem Characterization Of The Bnnts After Thesupporting

confidence: 73%

Simple, Economical, Scalable and Sustainable Route for Functionalization BNNTS

Sousa¹,

Meireles²,

Andrada³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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“…The spectrum of as-produced BNNTs (Figure 2a) exhibits two characteristic vibrational modes of BNNTs; [15][16][17]19,[31][32][33] namely, the in-plane axial B-N-B vibration of the nanotubes, centered at 1385 cm -1 and the out-of-plane B-N vibration tangential to the nanotube axis, centered at 806 cm -1 . The spectrum of the aminefunctionalized BNNTs (Figure 2b) exhibits a spectrum similar to that of the as-produced BNNTs; however, the heterogeneous environment of the surface-bound functional groups coupled with the large number of nanotube walls, which dominate the IR spectra, make identification of surface-bound amine groups nontrivial.…”

Section: Resultsmentioning

confidence: 99%

“…Several reports in recent years have described the surface modification of BNNTs as a means by which BNNTs may be solubilized, their electronic properties modified, and also to template the immobilization of materials from solution. [14][15][16][17][18][19][20] Although these reports describe the utilization of BNNTs to integrate with materials such as polymers and biomolecules, the density of functional groups that facilitate such interactions at the surface of the BNNTs is believed to be low in comparison with the modification of CNTs or the surface modification of conventional condensed phase materials such as nanoparticles or nanorods. In this context, the modification of BNNTs, which results in the generation of high densities of functional groups at the surface of BNNTs, is believed to have much potential for the utilization of these materials as nanoscale templates and for the integration with other nanoscale materials to form assemblies for chemical and biochemical applications, electronic device components, or composite materials.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of Gold Nanoparticles at the Surface of Amine- and Thiol-Functionalized Boron Nitride Nanotubes

et al. 2007

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Gold nanoparticles have been self-assembled at the surface of both amine-and thiol-functionalized boron nitride nanotubes (BNNTs) in solution. The chemical functionalization of the surface of the BNNTs was achieved following ammonia plasma irradiation in order to generate amine functional groups at the surface of the BNNTs. The amine-functionalized BNNTs (AF-BNNTs) were then covalently modified by the coupling of short-chain thiol-terminated organic molecules to result in thiol-functionalized BNNTs. The functionalization of the BNNTs was characterized using XPS, FT-IR spectroscopy, and EDS, whereas the nanoparticle-nanotube assemblies were characterized using HR-TEM and EELS. This approach constitutes a basis for the preparation of highly functionalized BNNTs and their utilization as nanoscale templates for assembly and integration with other nanoscale materials.

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“…Taking into account the above mentioned facts it is required to continue exploring the nanotube surface and ends (because of dangling bonds) in the context of covalent or non-covalent functionalization with different functional groups or molecules to tailor electronic properties. Theoretical reports [9][10][11][12][13][14] have shown variations in the electronic and magnetic properties of both nanotubes and nanosheets made up of BN when these structures interact with organic molecules or functional groups. On the other hand note that aromatic molecules such as thiophene (T; C 4 H 4 S), benzothiophene (BT; C 8 H 6 S) and dibenzothiophene (DBT; C 12 H 8 S), which belong to the heterocyclic molecules, are present in petroleum production [15,16].…”

Section: Introductionmentioning

confidence: 99%

Armchair Boron Nitride nanotubes—heterocyclic molecules interactions: A computational description

Anota

Cocoletzi

Garay-Tapia³

2015

Open Chemistry

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Ab-initio calculations using density functional theory (DFT) are used to investigate the non-covalent interactions between single wall armchair boron nitride nanotubes (BNNTs) with open ends and several heterocyclic molecules: thiophene (T; C 4 H 4 S), benzothiophene (BT; C 8 H 6 S) and dibenzothiophene (DBT; C 12 H 8 S). In the armchair model the nanotubes exhibit (n, n) chirality; here we consider n = 5. The exchange-correlation energies are treated according to the Hamprecht-Cohen-Tozer-Handy functional in the generalized gradient approximation (HCTH-GGA). A base function with double polarization is used. The geometry optimization of (5,5) BNNT-X; X = T, BT and DBT has been carried out using the minimum energy criterion in 5 different configurations of the molecules adsorbed on the nanotube. Our computer simulations have found that the preferential adsorption site of the molecule on the nanotube surface is the parallel configuration for BT and DBT, and at one nanotube end for the T fragment, with all cases having physical interactions. The polarity exhibits an increase which favors the possible dispersion, provided the electrons are polarized. The nanostructure functionalization increases the chemical reactivity which in turn enhances interactions between the molecule and the nanotube. The BNNT-dibenzothiophene work function reduction as compared with the pristine case yields the improvement of the field emission properties.

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Solubilization of boron nitride nanotubes

Abstract: A successful attempt in the functionalization and solubilization of boron nitride nanotubes is reported, and a functionalization mechanism based on interactions of amino functional groups with nanotube surface borons is proposed.

Cited by 202 publications

References 30 publications

Simple, Economical, Scalable and Sustainable Route for Functionalization BNNTS

Simple, Economical, Scalable and Sustainable Route for Functionalization BNNTS

Self-Assembly of Gold Nanoparticles at the Surface of Amine- and Thiol-Functionalized Boron Nitride Nanotubes

Armchair Boron Nitride nanotubes—heterocyclic molecules interactions: A computational description

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