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.

Multimodal luminescent-magnetic boron nitride nanotubes@NaGdF4:Eu structures for cancer therapy

2014 ◽  
Vol 50 (33) ◽  
pp. 4371-4374 ◽  
Author(s):  
Xia Li ◽  
Nobutaka Hanagata ◽  
Xuebin Wang ◽  
Maho Yamaguchi ◽  
Wei Yi ◽  
...  
Keyword(s):  
Cancer Therapy ◽  
Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Shell Structures ◽  
Core Shell

Boron nitride nanotubes@NaGdF4:Eu composites with core@shell structures were fabricated to trace and manipulate BNNTsin vitro.

Boron nitride nanotubes/polystyrene composites

2006 ◽  
Vol 21 (11) ◽  
pp. 2794-2800 ◽  
Author(s):  
Chunyi Zhi ◽  
Yoshio Bando ◽  
Chengchun Tang ◽  
Susumu Honda ◽  
Hiroaki Kuwahara ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Vapor Deposition ◽  
Composite Films ◽  
Chemical Vapor ◽  
Tensile Tests ◽  
Boron Nitride Nanotubes ◽  
Chemical Vapor Deposition Method ◽  
Transmission Electron ◽  
Good Transparency ◽  
First Time

Boron nitride nanotube (BNNT)/polystyrene (PS) composite films were fabricated for the first time using high-quality BNNTs synthesized via a chemical-vapor-deposition method. The composite films exhibited good transparency. Tensile tests indicated that the elastic modulus of the films was increased by ∼21% when a ∼1 wt% soluble BNNT fraction was in use. Dispersion of BNNTs in PS and interfacial interactions between them were investigated using transmission electron microscopy. The film thermal properties, such as stability to oxidation and glass transition temperatures were measured. The experimental results and simple theoretical estimates indicate that BNNTs is a promising additive material for polymeric composites.

Fullerene-Gold Core-Shell Structures and Their Self-Assemblies

2017 ◽  
Vol 16 (02) ◽  
pp. 1650029
Author(s):  
R. Sepahvand ◽  
S. Alihosseini ◽  
M. Adeli ◽  
P. Sasanpour
Keyword(s):  
Citric Acid ◽  
Self Assembly ◽  
Size Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Hybrid Nanomaterial ◽  
Gold Core ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Gold Nps

Hybrid nanomaterials consisting of functionalized fullerene and gold nanoparticle (NP) have been synthesized. Fullerene was functionalized by citric acid and used as reducing and capping agent for preparation of gold NPs. Functionalization of fullerene by use of citric acid was performed by enzymatic and thermal approaches. The core-shell structures containing gold NPs as core and fullerene as shell (gold/fullerene) were prepared. It was found that method and density of functionalization of fullerene effect final structure and therefore their physicochemical property of hybrid nanomaterial dramatically. Ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), atomic force microscopy (AFM), transmission electron microscopy (TEM) were used to analyze the structure of the synthesized hybrid nanomaterial and also study their self-assembly and physicochemical properties. Effect of the size, structure and morphology (e.g., agglomeration) of the synthesized hybrid nanomaterial on their UV-Vis absorption behavior has been also verified by theoretical modeling.

scholarly journals Synthesis, characterisation and applications of core–shell carbon–hexagonal boron nitride nanotubes

2020 ◽  
Vol 2 (11) ◽  
pp. 4996-5014
Author(s):  
Ruth Sang Jones ◽  
Barbara Maciejewska ◽  
Nicole Grobert
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Core Shell ◽  
Carbon Core

This review explores the rapidly emerging field of hetero-nanotubes consisting of a carbon core and hexagonal boron nitride shell.

Boron Nitride Nanotubes: Nanoparticles Functionalization and Junction Fabrication

2007 ◽  
Vol 7 (2) ◽  
pp. 530-534 ◽  
Author(s):  
Chunyi Zhi ◽  
Yoshio Bando ◽  
Guozhen Shen ◽  
Chengchun Tang ◽  
Dmitri Golberg
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
X Ray Diffraction ◽  
Carbon Nanostructure ◽  
Wet Chemistry ◽  
X Ray ◽  
Transmission Electron ◽  
First Time

Adopting a wet chemistry method, Au and Fe3O4 nanoparticles were functionalized on boron nitride nanotubes (BNNTs) successfully for the first time. X-ray diffraction pattern and transmission electron microscopy were used to characterize the resultant products. Subsequently, a method was proposed to fabricate heterojunction structures based on the particle-functionalized BNNTs. As a demonstration, BNNT-carbon nanostructure, BNNT-ZnO and BNNT-Ga2O3 junctions were successfully fabricated using the functionalized particles as catalysts.

Formation of bismuth iron oxide based core–shell structures and their dielectric, ferroelectric and magnetic properties

2019 ◽  
Vol 7 (5) ◽  
pp. 1280-1291 ◽  
Author(s):  
Alaka Panda ◽  
R. Govindaraj ◽  
R. Mythili ◽  
G. Amarendra
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Properties ◽  
Iron Oxide ◽  
Shell Structures ◽  
Core Shell ◽  
Bismuth Iron Oxide ◽  
The Core ◽  
Shell Nanostructures ◽  
Transmission Electron

Bismuth and iron oxides subjected to ball milling followed by controlled annealing treatments showed the formation of core–shell nanostructures with Bi2Fe4O9 as the core and a shell of BiFeO3 and Bi25FeO40 phases as deduced based on the analysis of transmission electron microscopy results.

Core–shell structures with metallic silver as nucleation agent of low expansion phases in BaO/SrO/ZnO/SiO2 glasses

CrystEngComm ◽  
2019 ◽  
Vol 21 (29) ◽  
pp. 4373-4386 ◽  
Author(s):  
Christian Thieme ◽  
Michael Kracker ◽  
Katrin Thieme ◽  
Christian Patzig ◽  
Thomas Höche ◽  
...  
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
Nucleating Agent ◽  
Shell Structures ◽  
Metallic Silver ◽  
X Ray Diffraction ◽  
Nucleation Agent ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Transmission

The role of silver as a nucleating agent in BaO/SrO/ZnO/SiO2 glasses is studied with a range of microstructure-characterization techniques, such as scanning transmission electron microscopy, ultraviolet-visible spectroscopy, and X-ray diffraction.

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
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