Half-Oxidized Nanoparticle (IMAGE) North Carolina State University Caption This is a half-oxidized 26 nm nanoparticle. The Ni region is colored red, and the NiO is colored blue and green. Credit Dr. Joe Tracy, North Carolina State University Usage Restrictions Credit must be given. 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.