18 August 2000
Vol 289, Issue 5482

About The Cover

Cover image expansion

COVER Atomistic simulations of liquid nanojets extend hydrodynamics to the nanoscale. The image shows the leading part of a 6-nm-wide, 200-nm-long propane jet propagating in vacuum at 200 m/s (individual molecules, small blue spheres). Molecular evaporation and thermal stress fluctuations that accelerate neck-shaped instabilities lead to droplet formation. Such nanojets may find use in patterning, printing, and biotechnology. See page 1165. [Image: U. Landman, M. Moseler, M. D. Wolf]