Double-Walled Carbon Nanotubes from Aldrich Materials Science

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Double-walled Carbon Nanotubes (DWCNTs) are composed of two concentric single-walled carbon nanotubes with unique optical and electronic properties. DWCNTs allow for the convalent functionalization of the outer-wall, allowing control over the solubility, while maintaining the properties of the outer-wall.1 Applications of DWCNTs include solar cells2 and field effect transistors.


Properties of DWCNTs available from Aldrich Materials Science are summarized in the following table

Table 1. Example Double-walled Carbon Nanotubes Properties

Product Number 637351
Production Method Chemical Vapor Deposition (CVD)
DWCNT Content 50-80% (10-40% other CNTs)
Dimensions (OD x ID x L) 5 nm x 1.3-2.0 nm x 50 um
Surface Area >600 m2/g (BET)
Bulk Density 0.12- 0.14 g/mL

About Sigma Aldrich

Sigma-Aldrich® is a leading high-technology company. Through our Materials Chemistry Centers of Excellence in research and manufacturing we develop advanced, enabling materials for your micro/nanoelectronics, alternative energy, display/optoelectronics, nanotechnology and related materials science and engineering applications. Specialties include ALD precursors, ultra-high purity inorganic halides, fuel cell materials, electronic grade dyes, specialty monomers and cGMP grade polymers.

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