Preparation, Purification, Characterization, and Cytotoxicity Assessment of Water‐Soluble, Transition‐Metal‐Free Carbon Nanotube Aggregates

The risk assessment of carbon materials, an important topic in nanomaterials research, has been hampered by the lack of characterizable samples. Transition-metal-free carbon nanohorn aggregates have been prepared that are covalently bonded aggregates of single-walled nanotubes. They were functionalized to give water-soluble derivatives (see picture), which were incubated with cells in cytotoxicity assessments. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z601718_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.