Nanomaterial Information

Symbol UV irradiated nC60
Name UVA-irradiated fullerene nanoparticles
Source MER, Tucson, AZ


Dispersant  -
Size N/A
Aggregate Size[1] 109.4 ± 7.2 nm [2]
ENM
electrophoretic
mobility[3]
-1.13 µm/(V/cm)-s 
Refractive Index 2.2

Toxicity test method

Suspension preparation method
50 mL of the 10 mg/L nC60 suspension was added to each of four 50-mL Erlenmeyer flasks, sealed with parafilm with vents. The four Erlenmeyer flasks were placed on the merry-go round at the center of a luzchem LZC-4V photoreactor (Luzchem, Ottawa, Ontario, Canada), and slowly rotated to ensure uniform exposure to the light source. Four 8W Black-light-lamps (EIKO F8T5/BL, 2 on each side) with an emitting spectrum in the UVA range (centered at 350 nm) provided ~ 2.0 mW/cm2 light intensity as measured by a radiometer (Control Company Friendswood. TX). After 7 days of UVA irradiation, the UV-irradiated nC60 suspension from the four flasks was combined and concentrated to 200 mg/L using 30 kDa MWCO centrifugal concentrators (Amicon Ultra, Millipore, Massachusetts). The sample was stored at room temperature in a 50-mL centrifuge tube wrapped in aluminum foil for up to 1 week before use.

Particle size measurement method

ENM electrophoretic mobility measurement.

 

Footnotes:
  1. Number mean hydrodynamic diameter nm. Measured by dynamic light scattering (Zetasizer Nano, Malvern, Worcestershire, UK)
  2. Qu, X. L.; Hwang, Y. S.; Alvarez, P. J. J.; Bouchard, D.; Li, Q. L., UV Irradiation and Humic Acid Mediate Aggregation of Aqueous Fullerene (nC(60)) Nanoparticles. Environ. Sci. Technol. 2010, 44, (20), 7821-7826.
  3. Measured at ~pH 5.


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