23 June 1995
Vol 268, Issue 5218

About The Cover

A combination of thin film deposition and physical masking techniques was used for the parallel synthesis of a spatially addressable library containing high-temperature cupric oxide superconductors. The color of each site is the natural color of reflected light of the library before being heated in air to form oxides. Each site is 1 millimeter by 2 millimeters. See page 1738. [Image: X.-D. Xiang and P. G. Schultz]