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637351

Sigma-Aldrich

Carbon nanotube, double-walled

50-80% carbon basis, O.D. × I.D. × L 5 nm × 1.3-2.0 nm × 50 μm

Synonym(s):

DWNT, Double wall carbon nanotubes

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About This Item

CAS Number:
308068-56-6
MDL number:
MFCD06411993
UNSPSC Code:
12352103
NACRES:
NA.23

Assay

50-80% carbon basis

form

powder

composition

carbon, >90% (trace metal basis)

O.D. × I.D. × L

5 nm × 1.3-2.0 nm × 50 μm

surface area

>600 m2/g

bulk density

0.12‑0.14 g/mL

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General description

Structure of double walled carbon nanotubes (DWNTs) can be imagined as a two coaxial concentric single walled carbon nanotubes (SWNTs). It has been prepared by catalytic chemical vapor deposition. DWNTs exhibit excellent field emission properties and may be potentially useful as field emission displays (FEDs) and field emission transistors (FETs).

Application

Carbon nanotube, double walled can be used for a variety of applications such as solar cells, nanomechanical resonators, film heaters, biosensors, and field emission displays.

Packaging

Packaged in glass bottles

Preparation Note

Chemical Vapor Deposition (CVD) Method

Analysis Note

50-80% DWNT content, 10-40% other CNTs, remainder being amorphous carbon and residual metal catalysts.

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Preparation of large-area double-walled carbon nanotube films and application as film heater
Wu ZP and Wang JN
Physica E: Low-Dimensional Systems and Nanostructures, 42(1), 77-81 (2009)
Double-walled carbon nanotube solar cells
Wei J, et al.
Nano Letters, 7(8), 2317-2321 (2007)
Vibrational behaviors of multiwalled-carbon-nanotube-based nanomechanical resonators
Li C and Chou T
Applied Physics Letters, 84(1), 121-123 (2004)
Size-selective growth of double-walled carbon nanotube forests from engineered iron catalysts.
Yamada T, et al.
Nature Nanotechnology, 1(2), 131-136 (2006)
Gram-scale CCVD synthesis of double-walled carbon nanotubes.
Flahaut E, et al.
Chemical Communications (Cambridge, England), 12, 1442-1443 (2003)

Articles

Manufacturing, Characterization and Use of Single Walled Carbon Nanotubes

Carbon nanotubes are materials that possess remarkable properties and offer extraordinary possibilities.

Sorting Carbon Nanotubes and Their Biological Applications

Carbon nanotubes (CNTs) have received much attention since their discovery in 1991 by Sumio lijima1 due to their excellent mechanical, electrical, and optical properties.

3D Printable Conductive Nanocomposites of PLA and Multi-walled Carbon Nanotubes

A nanocomposite is typically defined as a mixture between a host material (e.g., polymer matrix) and nanofillers with at least one dimension of less than 100 nm.

Polymer-Sorted Semiconducting Carbon Nanotubes for Transistors and Solar Cells

Single-walled carbon nanotubes (SWCNTs) are promising materials for use in the active channel of field-effect transistors (FETs), photoabsorbing layers of solar cells and photodetectors because of their ultrafast charge transport mobility.

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