scholarly journals Highly Ordered Boron Nitride Nanotube Arrays with Controllable Texture from Ammonia Borane by Template-Aided Vapor-Phase Pyrolysis

2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
Yuting Wang ◽  
Yasunori Yamamoto ◽  
Hajime Kiyono ◽  
Shiro Shimada
Keyword(s):  
Boron Nitride ◽  
Vapor Phase ◽  
Ammonia Borane ◽  
Boron Nitride Nanotubes ◽  
Nanotube Arrays ◽  
Boron Nitride Nanotube ◽  
Ordered Arrays ◽  
Different Temperatures ◽  
Ft Ir ◽  
Temperature Controlled

An efficient approach for the preparation of good-quality boron nitride nanotubes (BNNTs) is developed. BNNTs with specific texture were prepared from ammonia borane (BH3NH3) by vapor-phase pyrolysis with the aid of a template in two independent temperature-controlled furnaces. Two kinds of BNNTs, 200–300 nm wide×60 μm long and 70–80 nm wide×40 μm long, were produced after removal of the templates. The as-produced BNNTs were heated at different temperatures in the range of 1300–1700°C inNH3. FT-IR and XPS results confirmed the formation of BN fromBH3NH3. Ordered arrays of BNNTs without cracks on the surface were seen using microstructural observations. The diameter and length of the BNNTs are controlled using templates with different pore sizes and thickness. The wall thickness of the nanotubes was increased by increasing the number of deposition cycles. The crystallinity of the BNNTs was improved by heating at a high temperature (1700°C) inNH3.

Vibration Analysis of Single Walled Boron Nitride Nanotube Based Nanoresonators

2012 ◽  
Vol 3 (3) ◽  
Author(s):  
Mitesh B. Panchal ◽  
S. H. Upadhyay ◽  
S. P. Harsha
Keyword(s):  
Boron Nitride ◽  
Resonant Frequency ◽  
Continuum Mechanics ◽  
Boron Nitride Nanotubes ◽  
Response Analysis ◽  
Published Data ◽  
Boron Nitride Nanotube ◽  
Mass Sensor ◽  
Nanomechanical Resonators ◽  
Mass Sensitivity

In this paper, the vibration response analysis of single walled boron nitride nanotubes (SWBNNTs) treated as thin walled tube has been done using finite element method (FEM). The resonant frequencies of fixed-free SWBNNTs have been investigated. The analysis explores the resonant frequency variations as well as the resonant frequency shift of the SWBNNTs caused by the changes in size of BNNTs in terms of length as well as the attached masses. The performance of cantilevered SWBNNT mass sensor is also analyzed based on continuum mechanics approach and compared with the published data of single walled carbon nanotube (SWCNT) for fixed-free configuration as a mass sensor. As a systematic analysis approach, the simulation results based on FEM are compared with the continuum mechanics based analytical approach and are found to be in good agreement. It is also found that the BNNT cantilever biosensor has better response and sensitivity compared to the CNT as a counterpart. Also, the results indicate that the mass sensitivity of cantilevered boron nitride nanotube nanomechanical resonators can reach 10−23 g and the mass sensitivity increases when smaller size nanomechanical resonators are used in mass sensors.

Thermal Conductivity Enhancement of Coaxial Carbon@Boron Nitride Nanotube Arrays

2017 ◽  
Vol 9 (17) ◽  
pp. 14555-14560 ◽  
Author(s):  
Lin Jing ◽  
Majid Kabiri Samani ◽  
Bo Liu ◽  
Hongling Li ◽  
Roland Yingjie Tay ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Thermal Conductivity Enhancement ◽  
Nanotube Arrays ◽  
Boron Nitride Nanotube ◽  
Conductivity Enhancement

scholarly journals Synthesis and electrochemical performance of a polymer-derived silicon oxycarbide/boron nitride nanotube composite

RSC Advances ◽  
2017 ◽  
Vol 7 (35) ◽  
pp. 21576-21584 ◽  
Author(s):  
M. A. Abass ◽  
A. A. Syed ◽  
C. Gervais ◽  
G. Singh
Keyword(s):  
Boron Nitride ◽  
Electrochemical Performance ◽  
Boron Nitride Nanotubes ◽  
Silicon Oxycarbide ◽  
Boron Nitride Nanotube ◽  
Electrochemical Applications ◽  
Polymer Derived Ceramic ◽  
New Type

Synthesis of a new type of composite consisting of boron nitride nanotubes (BNNTs) filler in polymer-derived ceramic silicon oxycarbide (SiOC) for electrochemical applications is demonstrated.

Sonochemical Functionalization of Boron Nitride Nanomaterials

MRS Advances ◽  
2019 ◽  
Vol 5 (14-15) ◽  
pp. 709-716
Author(s):  
Haley B. Harrison ◽  
Jeffrey R. Alston
Keyword(s):  
Thermal Stability ◽  
Boron Nitride ◽  
Photoelectron Spectroscopy ◽  
Colloidal Stability ◽  
Hexagonal Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Covalent Attachment ◽  
Covalent Functionalization ◽  
X Ray ◽  
Ft Ir

AbstractBoron nitride nanotubes (BNNTs) and hexagonal boron nitride platelets (h-BNs) have received considerable attention for aerospace insulation applications due to their exceptional chemical and thermal stability. Presently, making BN nanomaterials compatible with polymer and composite matrices is challenging. Due to their inert and highly stable structure, h-BN and BNNTs are difficult to covalently functionalize. In this work, we present a novel sonochemical technique that enables covalent attachment of fluoroalkoxy substituents to the surface of BN nanomaterials in a controlled and metered process. Covalent functionalization is confirmed via colloidal stability analysis, FT-IR, and x-ray photoelectron spectroscopy (XPS).

On the vibrational characteristics of single-walled boron nitride nanotubes/polymer nanocomposites: A finite element simulation

2017 ◽  
Vol 31 (22) ◽  
pp. 1750208 ◽  
Author(s):  
S. Rouhi ◽  
R. Ansari ◽  
A. Nikkar
Keyword(s):  
Finite Element ◽  
Boron Nitride ◽  
Polymer Nanocomposites ◽  
Volume Fraction ◽  
Boron Nitride Nanotubes ◽  
Frame Structure ◽  
Boron Nitride Nanotube ◽  
Volume Percentage ◽  
Vibrational Behavior ◽  
Vibrational Characteristics

The finite element method is used here to investigate the vibrational behavior of single-walled boron nitride nanotube/polymer nanocomposites. The polymer matrix is modeled as a continuous media. Besides, nanotubes are modeled as a space-frame structure. It is shown that increasing the length of nanotubes at a constant volume fraction leads to decreasing of the nanocomposite frequency. By investigating the effect of volume percentage on the frequencies of the boron nitride nanotube-reinforced polymer nanocomposites, it is observed that for short nanotubes, the nanocomposites with larger nanotube volume fractions have larger frequencies. Also, through studying the first 10 frequencies of nanocomposites reinforced by armchair and zigzag nanotubes, it is shown that the effect of chirality on the vibrational behavior of nanocomposite is insignificant.

HETEROGENEOUS SOLIDIFICATION OF ALUMINUM ON BORON-NITRIDE NANOTUBE

NANO ◽  
2010 ◽  
Vol 05 (06) ◽  
pp. 361-367
Author(s):  
Y. F. LI ◽  
H. Q. YU ◽  
H. LI ◽  
K. M. LIEW ◽  
X. F. LIU
Keyword(s):  
Molecular Dynamics ◽  
Boron Nitride ◽  
Heterogeneous Nucleation ◽  
Boron Nitride Nanotubes ◽  
Boron Nitride Nanotube ◽  
Hierarchical Nanostructures ◽  
Structural Relevance ◽  
Hollow Cylinders ◽  
Dynamics Simulations ◽  
Internal Potential

Molecular dynamics simulations are carried out to examine the heterogeneous solidification of aluminum solution seeded by foreign boron-nitride nanotubes (BNNTs). The final structure indicates noticeably that Al atoms are concentrated to form incredible hierarchical nanostructures composed of coaxial and equidistant cylindrical shells with the BNNTs as the heterogeneous core. The structures of so-formed Al cylinders show strict structural matching and strong structural relevance with BNNTs. Heterogeneous solidification occurred on BNNTs follows a spiral nucleating mechanism. Heredity effect of these hollow cylinders can be clearly observed during the heterogeneous nucleation. The uniform internal potential field around BNNTs is found to be responsible for the formation of the coaxial cylindrical Al shells.

scholarly journals Electrical properties of O-self-doped boron-nitride nanotubes and the piezoelectric effects of their freestanding network film

RSC Advances ◽  
2018 ◽  
Vol 8 (51) ◽  
pp. 29141-29146 ◽  
Author(s):  
Chuncheng Ban ◽  
Ling Li ◽  
Liuxiao Wei
Keyword(s):  
Electrical Properties ◽  
Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Boron Nitride Nanotube ◽  
Piezoelectric Effects

Boron-nitride nanotube (BNNT) freestanding network films have been applied in various new fields, such as nanogenerators, nanotransistors, and nano-artificial eardrums.

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