Chromium-doped germanium-core silicon-shell nanowire (IMAGE) Michigan Technological University Caption A diagram of a nanowire cross-section shows the interaction between atoms in the nanowire core. Yellow atoms: germanium; red atoms: chromium; purple atoms around the outside of the yellow-red connections: silicon shell. Credit Ranjit Pati/Michigan Tech 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.