Nanomaterial Information

Name Carboxylated multi-walled carbon nanotubes
Source Nanolab, Waltham, MA

Dispersant  -
Size Outer Diameter: 15±5 nm
Length: 1-5 µm
Aggregate Size[1] 75.9 ± 10.6 nm
-2.97 µm/(V/cm)-s 
Refractive Index 2.2

Toxicity test method

Suspension preparation method
400 mg MWNT-COOH powder was added to 400 mL ultrapure water generated by a Barnstead EPure system (Thermo Fisher Scientific, Waltham, MA) in a 500-mL glass beaker. The mixture was sonicated in an ice bath with a sonicating probe (Vibra-Cell VCX 500, Sonics & Material, Newtown, CT) at 100 W for 30 min. The sample was stored at room temperature in a 500 mL clear glass bottle wrapped in aluminum foil before use within 6 months.

Particle size measurement method

ENM electrophoretic mobility measurement.


  1. Number mean hydrodynamic diameter nm. Measured by dynamic light scattering (Zetasizer Nano, Malvern, Worcestershire, UK)
  2. Measured at ~pH 5.

Go to Toxicity page