Nano Tweezers (IMAGE) University of Minnesota Caption The University of Minnesota team produced a microchip containing a large array of graphene electronic tweezers. Fluorescence images show DNA molecules and polystyrene nanoparticles trapped on the chip. Credit Barik et al., University of Minnesota Usage Restrictions With credit to Barik et al., University of Minnesota 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.