From Rice and supported in part by NSF, this database collects scientific articles researching environmental health and safety aspects of nanoparticles (read press release). From a librarian point of view, it leaves a little to be desired. In fact, it might be quite difficult to find the full text of the article based on the citation given. A guide to the abbreviations use for journals might be helpful (hmm, maybe they're using the pubmed ones?). I'd love to see the DOI and a link to the pubmed record (it does list PMID, though, so you can find the article that way if you recognize the number). For the articles on environmental concerns, there's no PMID... Hmm. Don't see a list of journals referenced or a methodology of how articles are identified.
Anyway, looks like a good first step and will no doubt be useful to those working in the area.