COOH functionalized carbon nanotubes, aka carboxylated, carboxyl, COOH-MWNT and COOH-SWNT,functionalization

COOH Functionalized Carbon Nanotubes

To carboxyl functionalize our carbon nanotubes (produced by the CVD method), we perform a reflux in concentrated sulfuric / nitric acid. This process results in a large concentration of carboxylic acid COOH groups on the nanotube surface, and also generates other groups. After functionalization, these carboxylated multiwall carbon nanotubes have 2-7 wt% COOH by titration. These typically have a high zeta potential, varying from -30 to -70mV as a function of pH.
We highly recommend our PASTE versions of the COOH terminated nanotubes. Pastes are supplied at 10wt% concentration in water, and are very easy to disperse in other solvents. In contrast, the dried carboxylate powders are less easy to redisperse.

Images below are FTIR, Raman and Zeta Potential Data of our COOH functionalized multiwall nanotubes (PD15L5-20-COOH). Click on the images to view in PDF. More analytical data can be requested via email.

FTIR Spectrum of COOH Functionalized MWCNT

Zeta potential of COOH Functionalized nanotubes

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MSDS for Multiwall & Doublewall Nanotubes MSDS for SWNT

Catalog No.	Description	Size, Price	Catalog No.	Description	Size, Price
COOH Functionalized Hollow Multiwall Carbon Nanotubes, purity >95% by TGA
PD15L1-5-COOH	OD: 15 ± 5 nm, Length:1-5 μm	1g, $160	PD15L5-20-COOH	OD:15 ± 5 nm Length:5-20 μm	1g, $130
PD15L1-5-COOH	OD: 15 ± 5 nm, Length:1-5 μm	5g, $750	PD15L5-20-COOH	OD:15 ± 5 nm Length:5-20 μm	5g, $600
PD30L1-5-COOH	OD:30 ± 15 nm, Length:1-5 μm	1g, $160	PD30L5-20-COOH	OD:30 ± 15 nm Length:5-20 μm	1g, $130
PD30L1-5-COOH	OD:30 ± 15 nm, Length:1-5 μm	5g, $750	PD30L5-20-COOH	OD:30 ± 15 nm Length:5-20 μm	5g, $600
COOH Functionalized Bamboo Structure Multiwall Carbon Nanotubes, purity >95% by TGA
BPD30L1-5-COOH	OD: 30 ± 10 nm Length: 1-5 μm	1g, $170	BPD30L5-20-COOH	OD: 30 ± 10 nm Length: 5-20 μm	1g, $140
BPD30L1-5-COOH	OD: 30 ± 10 nm Length: 1-5 μm	5g, $800	BPD30L5-20-COOH	OD: 30 ± 10 nm Length: 5-20 μm	5g, $650
COOH Functionalized Double Wall Carbon Nanotubes DWNT, purity >95% by TGA
D4L1-5-COOH	OD: 4 ± 1 nm Length: 1-5 μm	1g, Backordered	D4L5-20-COOH	OD: 4 ± 1 nm Length: 5-20 μm	1g, Backordered
D4L1-5-COOH	OD: 4 ± 1 nm Length: 1-5 μm	5g, Backordered	D4L5-20-COOH	OD: 4 ± 1 nm Length: 5-20 μm	5g, Backordered
COOH Functionalized Single Wall Carbon Nanotubes SWNT, purity >95% by TGA
D1.5L1-5-COOH	OD: ~1.5 nm Length: 1-5 μm	1g, Backordered
D1.5L1-5-COOH	OD: ~1.5 nm Length: 1-5 μm	5g, Backordered