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698849

Sigma-Aldrich

Carbon nanotube, multi-walled

>98% carbon basis, O.D. × L 6-13 nm × 2.5-20 μm

Synonym(s):

MWCNT, MWNT, Multiwall carbon nanotube

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About This Item

CAS Number:
308068-56-6
UNSPSC Code:
12352103
NACRES:
NA.23

Quality Level

100

Assay

>98% carbon basis

form

powder

composition

carbon, >98% (total metals impurities)

O.D. × L

6-13 nm × 2.5-20 μm

size

10 μm , average length, TEM
12 nm , average diameter, HRTEM

surface area

~220 m2/g , SSA

mp

3652-3697 °C (lit.)

density

~2.1 g/mL at 25 °C (lit.)

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General description

Multi walled carbon nanotubes (MWNTs, CNTs) were prepared by chemical vapor deposition (CVD). In chemical vapor deposition (CVD), a volatile precursor undergoes thermal decomposition at elevated temperatures to form a solid deposit on a substrate. The diameter of the tube ranges between 6-13nm and the average length is 10μm. The multiwalled nanotubes are stable in inert atmosphere upto a temperature of 3697oC. CVD production method is followed by HCl demineralization.

Application

A hybrid nanostructure system of MWNTs/titania was fabricated to be used as photodiodes in dye sensitized solar cells. MWNTs were investigated as electrodes for electrochemical biosensors. Use of MWNTs increased the efficacy, sensitivity and mechanical strength of the sensors.
Carbon nanotube, multi-walled (MWNT) belongs to the class of carbonaceous materials with excellent physiochemical, thermo-mechanical and electrochemical properties. This material can be used in a variety of sustainable energy applications such as solar cells, photocatalysis, biosensor, gas sensor, supercapacitor and as a filler that acts as a reinforcement to improve the mechanical property of composites.

Physical form

average wall thickness 7-13 graphene layers

Preparation Note

Chemical Vapor Deposition (CVD) Method

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Hybrid carbon nanotubes?TiO2 photoanodes for high efficiency dye-sensitized solar cells.
Dembele KT, et al.
The Journal of Physical Chemistry C, 117(28), 14510-14517 (2013)
A microfluidic chip platform with electrochemical carbon nanotube electrodes for pre-clinical evaluation of antibiotics nanocapsules.
Hong CC, et al.
Biosensors And Bioelectronics, 26(8), 3620-3626 (2011)
Jin Wuk Lee et al.
Aquatic toxicology (Amsterdam, Netherlands), 171, 9-19 (2015-12-31)
Multi-walled carbon nanotubes (MWCNTs) are nanoparticles widely applicable in various industrial fields. However, despite the usefulness of MWCNTs in industry, their oxidative stress-induced toxicity, combined toxicity with metal, and mitogen-activated protein kinase (MAPK) activation have not been widely investigated in
Effect of the method of dispersion on the properties of carbon nanotube and microfibrillar cellulose composites
Nadera A
Inventia Report, 433 (2013)
Si Gao et al.
Nature communications, 8(1), 163-163 (2017-08-02)
Knowing the three-dimensional structural information of materials at the nanometer scale is essential to understanding complex material properties. Electron tomography retrieves three-dimensional structural information using a tilt series of two-dimensional images. In this paper, we report an alternative combination of
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