Zipping van der Waals Forces (IMAGE) Stanford University School of Engineering Caption This is a stylized rendition of single walled carbon nanotubes that are just one atom thick in diameter. The red zones show where the attraction caused by van der Waals forces has bent or "zipped" two adjacent CNTs together. Credit Image courtesy of Alex Jerez. 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.