Media type: E-Article Title: Nanopores, nanomotors, negative refraction imprint: Springer Science and Business Media LLC, 2008 Published in: Nature Materials Language: English DOI: 10.1038/nmat2323 ISSN: 1476-1122; 1476-4660 Keywords: Mechanical Engineering ; Mechanics of Materials ; Condensed Matter Physics ; General Materials Science ; General Chemistry Origination: Footnote: