Rutile Tug-of-War (IMAGE) DOE/Pacific Northwest National Laboratory Caption Tiny, milled pieces of a titanium oxide mineral called rutile -- top left, bottom right -- face off within a high resolution microscope enhanced with the ability to measure minuscule forces called van der Waals forces. Credit Xin Zhang/PNNL Usage Restrictions Please credit Xin Zhang/PNNL 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.