The Gap (IMAGE) European Synchrotron Radiation Facility Caption Gap between the ordered molecules of a hydrophobic layer and water. The water molecules keep a distance of about one molecular diameter. Credit Max Planck Institute 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.