Nanopillar Solar Cell Assembly (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The aluminum substrate shown at top rear is patterned with pores seeded with anodized gold, spaced at intervals of about half a micron (millionth of a meter). At middle rear, the single-crystal cadmium sulfide nanopillars are about 200 nanometers in diameter (billionths of a meter). The test device in the foreground is shown next to a dime for scale. Credit Lawrence Berkeley National Laboratory Usage Restrictions with credit as given 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.