Bitumen surface (IMAGE) Vienna University of Technology Caption Bitumen surface imaged with different microscopic techniques: AFM (topography image) and AFM-IR (chemical distribution - IR absorption at 1262 cm-1). Credit TU Wien Usage Restrictions The image may only be used with the appropriate caption and credit. 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.