01 January 2010
Vol 327, Issue 5961

About The Cover

Cover image expansion

COVER Crystal structure of a molybdenum oxide nanowheel, 2.6 nanometers in diameter, around a smaller molybdenum oxide cluster. Miras et al. (page 72; related Perspective page 38) used a controlled-flow reactor to show that the central core serves as a transient template for the self-assembly of the nanowheel and is ultimately ejected to yield a hollow finished product. Image: Leroy Cronin, Ryo Tsunashima, Haralampos Miras/ University of Glasgow