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639230

Sigma-Aldrich

Carbon nanotube, single-walled, polyaminobenzene sulfonic acid functionalized

75-85% carbon basis, D × L 1.1 nm × 0.5-1.0 μm , bundle dimensions, avg. no. of layers, 1

Synonym(s):

Carbon nanotube, single-walled, PABS functionalized, SWNT, PABS functionalized

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About This Item

MDL number:
MFCD05865412
UNSPSC Code:
12352103
NACRES:
NA.23

Quality Level

100

assay

75-85% carbon basis

form

powder

mol wt

average Mw 400-600 g/mol (PABS)

feature

avg. no. of layers 1

extent of labeling

65% (PABS, typical)

D × L

1.1 nm × 0.5-1.0 μm , bundle dimensions

impurities

4% metals

solubility

ethanol: 0.05 mg/mL
DMF: 0.1 mg/mL
H2O: 5.0 mg/mL (As determined by near-IR absorbance spectroscopy.)

functional group

sulfonic acid

Related Categories

General description

Average diameter of individual SWCNT = 1.4nm ± 0.1nm

Application

Method for dispersing in water: In solid form SWNTs are highly entangled and associated in macroscopic particles. It requires significant effort to break such an association and bring the material in solution. Sonicate 50 mg of material in 2 ml water for 30 min. Add 8 ml of water and sonicate for additional 90 min. Typically, after this procedure all material is completely dispersed according to visual observation. For quantitative measurement of the solubility, allow the dispersion to stand overnight at room temperature. Because of the high optical density of concentrated dispersion, dilute an aliquot from the upper layer of the studied dispersion by a factor of 100. The concentration of the diluted solution is estimated from the recorded NIR spectra using a plot of the absorbance at 9750 cm-1 compared to the concentration of a standard solution (see reference).

Packaging

Packaged in glass bottles

Preparation Note

Electric Arc Discharge Method

Analysis Note

Carbonaceous content

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Bin Zhao et al.
Journal of the American Chemical Society, 127(22), 8197-8203 (2005-06-02)
Poly(aminobenzene sulfonic acid) (PABS) and polyethylene glycol (PEG) were covalently attached to single-walled carbon nanotubes (SWNTs) to form water-soluble graft copolymers. Quantitative near-IR (NIR) spectroscopic studies of these SWNT graft copolymers indicate a water solubility of about 5 mg/mL, and
Zhao, B. et al
Advances in Functional Materials, 14, 71-71 (2004)
Nano Letters, 3, 309-309 (2003)

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