How to Make a Nanocage (IMAGE) Washington University in St. Louis Caption Gold nanocages (right) are hollow boxes made by precipitating gold on silver nanocubes (left). The silver simultaneously erodes from within the cube, entering solution through pores that open in the clipped corners of the cube. Credit WUSTL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.