Role of structural defects in the ultraviolet luminescence of multiwall boron nitride nanotubes

2015 ◽  
Vol 118 (23) ◽  
pp. 234307 ◽  
Author(s):  
Aurélie Pierret ◽  
Hanond Nong ◽  
Frédéric Fossard ◽  
Brigitte Attal-Trétout ◽  
Yanming Xue ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Structural Defects

scholarly journals Synthesis of Boron Nitride Nanotubes Using Plasma-Assisted CVD Catalyzed by Cu Nanoparticles and Oxygen

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 651
Author(s):  
Tatsuya Shiratori ◽  
Ichiro Yamane ◽  
Shoto Nodo ◽  
Ryo Ota ◽  
Takashi Yanase ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Chemical Vapor ◽  
Radial Breathing Mode ◽  
Boron Nitride Nanotubes ◽  
Shell Structures ◽  
Core Shell ◽  
Cu Nanoparticles ◽  
Transmission Electron ◽  
Mode Vibration

We found that oxidized Cu nanoparticles can catalyze the growth of boron nitride nanotubes from borazine via plasma-assisted chemical vapor deposition. The Raman spectra suggest that the formation of thin-walled nanotubes show a radial breathing mode vibration. The presence of oxygen in the plasma environment was necessary for the growth of the nanotubes, and a part of the nanotubes had a core shell structure with a cupper species inside it. In atomic resolution transmission electron microscope (TEM) images, Cu2O was found at the interface between the Cu-core and turbostratic BN-shell. The growth mechanism seemed different from that of carbon nanotube core-shell structures. Therefore, we pointed out the important role of the dynamic morphological change in the Cu2O-Cu system.

scholarly journals Role of Hydrogen in High-Yield Growth of Boron Nitride Nanotubes at Atmospheric Pressure by Induction Thermal Plasma

ACS Nano ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 884-893 ◽  
Author(s):  
Keun Su Kim ◽  
Martin Couillard ◽  
Homin Shin ◽  
Mark Plunkett ◽  
Dean Ruth ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Thermal Plasma ◽  
Atmospheric Pressure ◽  
Boron Nitride Nanotubes ◽  
High Yield ◽  
Induction Thermal Plasma

The role of amino acid functionalization for improvement of adsorption Thioguanine anticancer drugs on the boron nitride nanotubes for drug delivery

2021 ◽  
pp. 125664
Author(s):  
Yasir A. Atia ◽  
Dmitry Olegovich Bokov ◽  
Khayrullin Rustam Zinnatullovich ◽  
Mustafa M. Kadhim ◽  
Wanich Suksatan ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Amino Acid ◽  
Boron Nitride ◽  
Anticancer Drugs ◽  
Boron Nitride Nanotubes

Role of Dimethyl Sulfoxide in the Hydrolytic Peeling of Boron Nitride Nanotubes

2009 ◽  
Vol 113 (35) ◽  
pp. 15565-15568 ◽  
Author(s):  
Francisco Avila ◽  
Juan F. Arenas ◽  
Daniel Peláez ◽  
Juan C. Otero ◽  
Yoshio Bando ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Dimethyl Sulfoxide ◽  
Boron Nitride Nanotubes

Role of Diameter, Model, and Length of Boron Nitride Nanotubes in Adsorption of Formaldehyde

2014 ◽  
Vol 23 (1) ◽  
pp. 62-67 ◽  
Author(s):  
Ali Varasteh Moradi ◽  
Saeedeh Hashemian ◽  
Ali Ahmadi Peyghan ◽  
Mohammad T. Baei
Keyword(s):  
Boron Nitride ◽  
Boron Nitride Nanotubes

Structural relationships in the synthesis of cubic boron nitride thin films by ion-assisted deposition

1994 ◽  
Vol 52 ◽  
pp. 638-639
Author(s):  
D. L. Medlin ◽  
T. A. Friedmann ◽  
P. B. Mirkarimi ◽  
M. J. Mills ◽  
K. F. McCarty
Keyword(s):  
Boron Nitride ◽  
Ion Irradiation ◽  
Cubic Boron Nitride ◽  
Film Stress ◽  
Bonded Phases ◽  
Structural Relationships ◽  
Precursor Material ◽  
Pressure Synthesis ◽  
Microstructure Of The Material

The allotropes of boron nitride include two sp2-bonded phases with hexagonal and rhombohedral structures (hBN and rBN) and two sp3-bonded phases with cubic (zincblende) and hexagonal (wurtzitic) structures (cBN and wBN) (Fig. 1). Although cBN is synthesized in bulk form by conversion of hBN at high temperatures and pressures, low-pressure synthesis of cBN as a thin film is more difficult and succeeds only when the growing film is simultaneously irradiated with a high flux of ions. Only sp2-bonded material, which generally has a disordered, turbostratic microstructure (tBN), will form in the absence of ion-irradiation. The mechanistic role of the irradiation is not well understood, but recent work suggests that ion-induced compressive film stress may induce the transformation to cBN.Typically, BN films are deposited at temperatures less than 1000°C, a regime for which the structure of the sp2-bonded precursor material dictates the phase and microstructure of the material that forms from conventional (bulk) high pressure treatment.

Molecular insights on the dynamic stability of peptide nucleic acid functionalized carbon and boron nitride nanotubes

2021 ◽  
Vol 23 (1) ◽  
pp. 219-228
Author(s):  
Nabanita Saikia ◽  
Mohamed Taha ◽  
Ravindra Pandey
Keyword(s):  
Nucleic Acid ◽  
Boron Nitride ◽  
Nucleic Acids ◽  
Dynamic Stability ◽  
Peptide Nucleic Acid ◽  
Rational Design ◽  
Peptide Nucleic Acids ◽  
Boron Nitride Nanotubes ◽  
Molecular Hybrids ◽  
Single Wall Nanotubes

The rational design of self-assembled nanobio-molecular hybrids of peptide nucleic acids with single-wall nanotubes rely on understanding how biomolecules recognize and mediate intermolecular interactions with the nanomaterial's surface.

Density Functional Theory Study of Antioxidant Adsorption onto Single- Wall Boron Nitride Nanotubes: Design of New Antioxidant Delivery Systems

2019 ◽  
Vol 22 (7) ◽  
pp. 470-482
Author(s):  
Samereh Ghazanfary ◽  
Fatemeh Oroojalian ◽  
Rezvan Yazdian-Robati ◽  
Mehdi Dadmehr ◽  
Amirhossein Sahebkar
Keyword(s):  
Density Functional Theory ◽  
Boron Nitride ◽  
Vitamin C ◽  
Electric Field ◽  
External Electric Field ◽  
Lipoic Acid ◽  
Density Functional ◽  
Cell Interaction ◽  
Boron Nitride Nanotubes ◽  
Functional Theory

Background: Boron Nitride Nanotubes (BNNTs) have recently emerged as an interesting field of study, because they could be used for the realization of developed, integrated and compact nanostructures to be formulated. BNNTs with similar surface morphology, alternating B and N atoms completely substitute for C atoms in a graphitic-like sheet with nearly no alterations in atomic spacing, with uniformity in dispersion in the solution, and readily applicable in biomedical applications with no obvious toxicity. Also demonstrating a good cell interaction and cell targeting. Aim and Objective: With a purpose of increasing the field of BNNT for drug delivery, a theoretical investigation of the interaction of Melatonin, Vitamin C, Glutathione and lipoic acid antioxidants using (9, 0) zigzag BNNTs is shown using density functional theory. Methods: The geometries corresponding to Melatonin, Vitamin C, Glutathione and lipoic acid and BNNT with different lengths were individually optimized with the DMOL3 program at the LDA/ DNP (fine) level of theory. Results: In the presence of external electric field Melatonin, Vitamin C, Glutathione and lipoic acid could be absorbed considerably on BNNT with lengths 22 and 29 Å, as the adsorption energy values in the presence of external electric field are considerably increased. Conclusion: The external electric field is an appropriate technique for adsorbing and storing antioxidants on BNNTs. Moreover, it is believed that applying the external electric field may be a proper method for controlling release rate of drugs.

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