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Letter

Nature Materials 8, 576–579 (1 July 2009) | doi:10.1038/nmat2467

Step-by-step rotation of a molecule-gear mounted on an atomic-scale axis

C. Manzano , W.-H. Soe , H. S. Wong , F. Ample , A. Gourdon , N. Chandrasekhar & C. Joachim

Gears are microfabricated down to diameters of a few micrometres. Natural macromolecular motors, of tens of nanometres in diameter, also show gear effects.