Self-aligning Nanotubes (image) Helmholtz-Zentrum Dresden-Rossendorf Caption What looks like sand dunes is actually smaller than a single grain of sand. Thanks to electrostatic surface interactions, DNA nanotubes (shown here in red) align along the prefabricated nanopattern on a silicon surface. Credit Helmholtz-Zentrum Dresden-Rossendorf Usage Restrictions None 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.