Number 19 (Story #1), January 29, 1991 by Phillip F. Schewe and Ben Stein IMAGES OF AN ELECTROPLATED MONOLAYER OF COPPER , with atomic-resolution, have been made in situ by an atomic force microscope. Paul Hansma (805-893-2523) and his colleagues at Santa Barbara studied the deposition of copper atoms on a gold substrate in two different electrolytic solutions. Such atomic-resolution electrochemistry will be particularly important for the study and design of fuel cells and sensors. (Science 11 Jan. 1991.)