12 October 2001
Vol 294, Issue 5541

About The Cover

Cover image expansion

COVER Single-crystalline silver nanowires (width, 0.4 nm) grown inside the pores of self-assembled calix[4]hydroquinone nanotubes. Because these nanowires are coherently oriented as three-dimensional arrays of ultrahigh density, they could be used as model systems to investigate one-dimensional phenomena and as connectors in nanodevices. 348 [Image: K. S. Kim]