Technical Data Sheet
IsoNanotubes-M
Metallic SWNTs

IsoNanotubes-S
Semiconducting SWNTs

PureTubes
Ultra High Purity SWNTs

8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

Product Delivery Forms
We currently offer our IsoNanotubes and PureTubes in two delivery forms:
Aqueous surfactant solution and surfactant-eliminated powder. Our IsoNanotube and PureTube
solutions contain dionized water, nanotubes, and a proprietary combination of ionic surfactants.
Our IsoNanotube solutions also contain some iodixanol, a non-ionic, water-soluble iodine derivative
which we use as a density gradient medium. Our powders are comprised of nearly 100% nanotubes(we do not use any binders or fillers), and have been formulated so that they are easy to use, break apart,and re-suspend.

IsoNanotubes-M

IsoNanotubes-S

A

B

PureTubes
Figure 1. A. 1 mg of metallic IsoNanotubes in solution
and 10 mg of metallic IsoNanotubes powder. B. 1 mgof semiconducting IsoNanotubes in solution and 10mg of semiconducting IsoNanotubes powder. C. 25mg of PureTubes in solution and 25 mg of PureTubes
powder.

C8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

Properties at a Glance
Property

IsoNanotubes-M IsoNanotubes-S

PureTubes

Measurement

Set Figure

NanotubeType

Arc discharge

Arc discharge

Arc discharge

Manufacturer
datan/aDiameterRange

1.2 - 1.7 nm

1.2 - 1.7 nm

1.2 - 1.7 nm

Manufacturer
data

n/a

MeanDiameter

1.4 nm

1.4 nm

1.4 nmManufacturer
datan/aLengthRange

100 nm – 4 µm

100 nm – 4 µm

100 nm – 4 µm

AFM

2MeanLength~0.5 micron~1 micron~1 micron

AFM

2Catalyst
Impurity~1% by mass

~1% by mass

~0.5% by mass NAA, TGA

Carbonaceous
Impurity< 5% by mass

< 5% by mass

< 5% by mass

TGA, Raman

4, 5

CNT Content

n/a90%, 95%,98%, or 99+%

n/a

Opticalabsorbance

6Metallic
CNT Content

70%, 95%, 98%
or 99%

n/an/aOpticalabsorbance

6Shelf Life

6 months

6 months

6 months

n/an/an/aNanotube
Concentration

0.01 mg/mL

0.01 mg/mL

0.25 mg/mLn/an/an/a

Surfactant
Concentration

1% w/v

1% w/v

1% w/vn/an/an/a

Surfactant
Type

Ionic(proprietarymixture)

Ionic(proprietarymixture)

Ionic(proprietarymixture)n/an/an/a

Semiconducting

8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

Solution

Powder3, 4

Electronic Type Enrichment
Optical AbsorbanceIsoNanotubes-M

IsoNanotubes-S

1.0

1.2

IsoNanotubes-M 95%
Unsorted CNTs

0.9

IsoNanotubes-S 99%
Unsorted CNTs

1.00.7

Absorbance (a.u)

Absorbance (a.u)

0.8

0.6
0.5
0.4

0.8

0.6

0.4

0.3
0.2
0.2
0.1

0.1
400

600

A800

1000

1200

400600B

Wavelength (nm)

800

1000

1200

Wavelength (nm)PureTubes

Absorbance (a.u)

0.6

PureTubes
Unsorted CNTs

0.5

0.4

0.3

0.1
400

C

600

800

1000

1200

Figure 2. A. B. C. Optical absorbance plots for ourIsoNanotubes-M (98%). IsoNanotubes-S (99%),
and PureTubes, respectively. Following themethod of Ouyang et al. (Acc. Chem. Res. 35, 1018(2002)), we can calculate the transition energies
for nanotubes in our diameter range (1.2 - 1.7 nm).
We see peaks where we would expect them: S33
transitions should lie between ~450-630 nm, M11transitions between ~600-850 nm, and S22transitions between ~ 900-1,270 nm. We
estimate our metallic and semiconducting
enrichment levels based on ratios of the M11 andS22 peak areas after linear backgroundsubtraction. Before comparison, the individual
peak areas are scaled by empirically determinedvalues for the M11 and S22 extinction coefficients.

Wavelength (nm)8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

Metal Catalyst
Neutron Activation Analysis

Unprocessed SWNTs

IsoNanotubes-M + S

PureTubes

Nickel (wt %)

3.59

0.07

0.23

Yttrium (wt %)

0.70

0.38

0.05

Iron (wt %)

0.70

0.72

0.06

Total (wt %)

4.99

1.17

0.34

Iodine (wt %)

0.00

5.29

0.00

Full elemental profiles of our products are available upon request.

Figure 3. Neutron activation analysis (NAA) data taken from our IsoNanotube and PureTube powders.
NAA reveals that our IsoNanotubes and PureTubes contain significantly lower levels of metallic/catalyst
impurities than the raw arc discharge SWNTs from which they are produced. Our IsoNanotube samples,
however, contain approximately 5% iodine by mass, resulting from residual iodixanol on the surface ofthe nanotubes that is not eliminated by our surfactant removal procedures.

8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

Metal Catalyst
IsoNanotubes-M

IsoNanotubes-S

100%
90%
80%

100%
90%
80%

Mass Remaining (%)

Mass Remaining (%)

Thermogravimetric Analysis

70%60%50%40%30%20%10%0%0100200300

400

500

600

20%10%0%0700

Temperature (°C)

A

70%60%50%40%30%100B

200300

400

500

600

700

Temperature (°C)

Mass Remaining (%)

PureTubes
100%90%80%70%60%50%40%30%20%10%0%0C

100200300

400

500

600

700

800

Temperature (°C)

Figure 4. Thermogravimetric (TGA) plots of ournanotube products. A, B. Approximately 2/3 ofthe ~15% mass decrease which occurs between~200 and ~400°C is attributable to the burnoff
of residual iodixanol adsorbed to the surface ofthe nanotubes. NAA data indicates that ourIsoNanotubes contain roughly 5% iodine bymass (see Figure 3); iodine comprises roughly
half the mass of an iodixanol molecule. The
remaining 5% mass decrease is attributable tothe burnoff of residual surfactant andcarbonaceous impurities. C. Because ourPureTubes do not contain iodixanol, the burnoff
of residual surfactant and amorphous carbon issolely accountable for the ~5% mass decrease
which occurs between approximately 200 and400°C.

8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

800

Amorphous Carbon
IsoNanotubes-M (95%)

IsoNanotubes-S (99%)

4000

8000

3000

6000

Intensity (a.u)

Intensity (a.u)

Raman

2000

1000

4000

2000

00
1200

1300

1400

1500

1600

1700

-1
Wavenumber (cm )

A

1300

B

1400

1500

1600

1700

-1
Wavenumber (cm )PureTubes
Figure 5. A. B. C. Resonance Raman plots for our
IsoNanotubes-M (95%). IsoNanotubes-S (99%),
and PureTubes, respectively. All Raman
measurements were taken using a 514 nm laser.
The G/D ratios of our products range fromapproximately 12 to 41, indicating extremely low
levels of amorphous carbon and/or damaged
nanotubes.

50000

Intensity (a.u)

40000

30000

20000

10000

01300

C

1400

1500

1600-1
Wavenumber (cm )17008025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com

Length
Atomic Force Microscopy
IsoNanotubes-M

IsoNanotubes-S

0.14

0.12

0.12

0.1

0.08

Frequency

Frequency

0.1
0.08
0.06

0.06

0.04

0.04

0.02

0.02
0000.511.5

200.51

1.5

2

Nanotube Length (µm)

Nanotube Length (µm)

PureTubes
0.1

Figure 6. Atomic-force microscopy (AFM) data
indicates that our SWNTs range in length fromapproximately 100 nm to 4 microns. A. B. C.
Length histograms of our IsoNanotubes-M,
IsoNanotubes-S, and PureTubes, respectively.

0.09
0.08

Frequency

0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

Nanotube Length (µm)

8025 Lamon Avenue, Suite 43, Skokie, IL 60077
Tel USA: +1-216-314-0106

eMail: sales@nanointegris.com