Two of the first studies in toxicity of carbon nanotube were by Chiu Wing Lam et al.1 C.W. Lam et al., Toxicolog. Sci. 77 (2004), p. 126. View Record in Scopus | Cited By in Scopus (509) and David Warheit et al., who reported that carbon nanotube can damage lung tissue in mice. Their works were subsequently introduced in Science in 2003. Since then, toxicity of carbon nanotube has become a fresh research topic and a number of papers have been dedicated to this field.