18 February 2011
Vol 331, Issue 6019

About The Cover

Cover image expansion

COVER False-colored atomic force micrograph of two types of molecules forming a mixed self-assembled monolayer on a gold surface. The two molecules differ in height by 0.2 nanometers, giving the appearance of ripples. This image was awarded first place in the photography category in the 2010 Science/NSF International Science & Engineering Visualization Challenge. The winning entries are featured in a special section starting on page 847 and at Image: Seth B. Darling, Argonne National Laboratory; and Steven J. Sibener, University of Chicago