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406074

Sigma-Aldrich

Carbon nanotube, multi-walled

powdered cylinder cores, 20-30% MWCNT basis, O.D. × L 7-12 nm × 0.5-10 μm, avg. no. of layers, 5 ‑ 20

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

Assay

20-30% MWCNT basis

form

powder

feature

avg. no. of layers 5 ‑ 20

composition

carbon content, >99% TGA

O.D. × L

7-12 nm × 0.5-10 μm

avg. part. size

−270 mesh
<53 μm

mp

3652-3697 °C (lit.)

density

~2.1 g/mL at 25 °C (lit.)

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General description

Multi-walled carbon nanotube core surrounded by a fused carbon shell, the remainder being multi-layer polygonal carbon nanoparticles and amorphous and graphitic carbon nanoparticles.It contains approximately 5-20 graphitic layers. Carbon nanotubes produced by arc discharge technique contain very low impurity and possesses very high crystallinity. 4

Application

Bundles of MWNTs were trapped and manipulated to form nanotube ropes using optical tweezer. MWNTs were calcined and sonicated to form carbon nanoribbons. The nanoribbons were used to fabricate array of 98 source and drain electrodes on a 300 nm SiO2/p++Si substrates.2 A MWNT probe was fabricated on Si cantilevers.
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

Approximately 5-20 graphitic layers. Contains approximately 10-40% tubes, the remainder being multi-layer polygonal carbon nanoparticles and amorphous and graphitic carbon nanoparticles.

Preparation Note

Electric Arc Discharge Method

Other Notes

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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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Alice Marcotte et al.
Nature materials, 19(10), 1057-1061 (2020-07-15)
Fluid and ionic transport at the nanoscale has recently demonstrated a wealth of exotic behaviours1-14. However, artificial nanofluidic devices15-18 are still far from demonstrating the advanced functionalities existing in biological systems, such as electrically and mechanically activated transport19,20. Here, we
Simple and reliable method of conductive SPM probe fabrication using carbon nanotubes
Dremov V, et al.
arXiv null
Processing carbon nanotubes with holographic optical tweezers
Plewa J, et al.
Optics Express, 12(9), 1978-1981 (2004)
Nanostructured Pt decorated graphene and multi walled carbon nanotube based room temperature hydrogen gas sensor
Kaniyoor A, et al.
Nanoscale, 1(3), 382-386 (2009)
Polyaniline/multi-walled carbon nanotube composites with core-shell structures as supercapacitor electrode materials
Zhou Y, et al.
Electrochimica Acta, 55(12), 3904-3908 (2010)
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