Testing of the ecotoxicity potential of TUBALL single-wall carbon nanotubes carried out according to the relevant OECD guideline, has shown no toxic effects on algae, in contrast to a set of recent results on similar tests with multi-wall carbon nanotubes. Among plausible reasons for this is the unique physical nature, particularly the high flexibility, of single-wall carbon nanotubes compared with most other types of carbon nanomaterials.       The range of applications of carbon nanotubes is c...