Nano Archive

Biocompatibility and toxicological studies of carbon nanotubes doped with nitrogen

Carrero-Sanchez, J. C. and Elias, A. L. and Mancilla, R and Arrellin, G and Terrones, H and Laclette, J. P. and Terrones, M (2006) Biocompatibility and toxicological studies of carbon nanotubes doped with nitrogen. NANO LETTERS, 6 (8). pp. 1609-1616.

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In this report, we compare the toxicological effects between pure carbon multiwalled nanotubes (MWNTs) and N-doped multiwalled carbon (CNx) nanotubes. Different doses of tubes were administered in various ways to mice: nasal, oral, intratracheal, and intraperitoneal. We have found that when MWNTs were injected into the mice's trachea, the mice could die by dyspnea depending on the MWNTs doses. However, CNx nanotubes never caused the death of any mouse. We always found that CNx nanotubes were far more tolerated by the mice when compared to MWNTs. Extremely high concentrations of CNx nanotubes administrated directly into the mice's trachea only induced granulomatous inflammatory responses. Importantly, all other routes of administration did not induce signs of distress or tissue changes on any treated mouse. We therefore believe that CNx nanotubes are less harmful than MWNTs or SWNTs and might be more advantageous for bioapplications.

Item Type:Article
Subjects:Physical Science > Nano objects
NanoSafety > Environment, health and safety aspects of nanotechnology
ID Code:3730
Deposited By:Farnush Anwar
Deposited On:22 Jan 2009 13:06
Last Modified:12 Feb 2009 13:06

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