Effects of gamma irradiation for sterilization on aqueous dispersions of length sorted carbon nanotubes |
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| Authors: | Jeffrey A. Fagan Nancy J. Lin Rolf Zeisler Angela R. Hight Walker |
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| Affiliation: | (1) Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;(2) Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;(3) Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA |
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| Abstract: | There is currently great interest in the potential use of carbon nanotubes as delivery vessels for nanotherapeutics and other
medical applications. However, no data are available on the effects of sterilization methods on the properties of nanotube
dispersions, the form in which most medical applications will be processed. Here we show the effects of gamma irradiation
from a 60Co source on the dispersion and optical properties of single-wall carbon nanotubes in aqueous dispersion. Samples of different
length-refined populations were sealed in ampoules and exposed to a dose of approximately 28 kGy, a level sufficient to ensure
sterility of the dispersions. In contrast to literature results for solid-phase nanotube samples, the effects of gamma irradiation
on the dispersion and optical properties of the nanotube samples were found to be minimal. Based on these results, gamma irradiation
appears sufficiently non-destructive to be industrially useful for the sterilization of nanotube dispersions. |
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| Keywords: | Nanotube single-wall nanotube （SWNT） single-wall carbon nanotube （SWCNT） gamma irradiation sterilization dispersion |
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