Boron Nitride Nanotubes: What You Should Know About Their Properties, Synthesis and Applications

Boron Nitride Nanotubes (BNNTs) are increasingly gaining attention in both academic and industrial research. BNNTs have unique properties that make them useful not only in traditional nanomaterial applications but also in emerging scientific and technological fields. Here, we will delve into the properties of BNNTs, their synthesis methods, and their many applications.

Properties

BNNTs are a type of nanotube that is formed from boron and nitrogen atoms arranged in a hexagonal lattice. They are known for having high thermal and chemical stability, making them useful in the aerospace industry for applications such as heat shields. The hexagonal lattice arrangement also makes them electrically insulating, which makes them a good candidate for electronic devices.

In addition to their excellent physical properties, BNNTs are also known for their exceptional mechanical properties. Studies show that BNNTs have a high tensile strength of up to 30 times that of steel, making them suitable for use in reinforcing materials for composites.

Synthesis Methods

There are several methods for producing BNNTs, including chemical vapor deposition (CVD), arc discharge, and laser ablation. Among these, CVD is the most commonly used method. In the CVD process, a gaseous precursor containing boron and nitrogen is passed over a substrate at high temperatures, and BNNTs are formed.

Another method that has gained much attention in recent years is the template-assisted synthesis method. In this method, porous templates are used to control the size and shape of BNNTs during synthesis.

Applications

BNNTs have a wide range of applications due to their unique properties. One of the most prominent applications is in the field of electrochemistry, where BNNTs are used in electrodes for high-performance and long-lasting batteries.

BNNTs are also used in the medical field, where they have been found to have antibacterial properties that make them useful as an agent for infection control. In addition, BNNTs also have potential in drug delivery, as their hollow structure can be used to encapsulate drugs and deliver them to specific sites in the body.

Other areas where BNNTs are being explored include:

Aerospace

BNNTs are being used as a reinforcement material in composites to make stronger and lighter aircraft parts.

Electronics

BNNTs could be used to create high-performance transistors and nanoelectronic devices.

Optics

BNNTs have unique optical properties that could make them useful in sensors and other optical devices.

Energy

BNNTs could be used as a catalyst in fuel cells to improve their efficiency, or as a material for hydrogen storage.

Thermal Management

BNNTs have excellent thermal conductivity, making them useful in heat dissipation applications, such as computer chips.

Overall, the unique properties of BNNTs make them a promising material for a wide range of applications across diverse fields. While much research still needs to be done to fully understand their potential, BNNTs hold great promise as a material of the future.

Specifications of Boron Nitride Nanotubes:

Synonyms

BN Nts, BNNT, BNNTs, h-BN NTs; h BN NTs; hexagonal boron nitride; Boron mononitride; Nitridoborane; Nitriloborane

IUPAC Name

azanylidyneborane

Molecular Weight

24.82 g/mol

Molecular Formula

BN

Canonical SMILES

B#N

InChI

InChI=1S/BN/c1-2

InChI Key

PZNSFCLAULLKQX-UHFFFAOYSA-N

Melting Point

2.29 g/cm³

Purity

(5N) 99.999%

Density

1.9 to 2.1 g/cm3

Appearance

Crystalline

Characterization Methods

XRD, XPS, AES, SIM, and HRTEM

Exact Mass

25.0124

Metal Impurities

(max.)0.001%

Monoisotopic Mass

25.0124

Poisson Ratio

0.11

Production Method

CVD or CVT

Refractive Index

1.8 (h-BN); 2.1 (c-BN)

Resistivity

electrical resistivity 13 to 15 10x Ω-m

Specific Heat

840 to 1610 J/kg-K

Storage Conditions

Room temperature and dry

Thermal Conductivity

29 to 96 W/m-K

Thermal Expansion

0.54 to 18 µm/m-K

Type

Synthetic

Young's Modulus

14 to 60 GPa