Jennika Greer in the lab (IMAGE) Northwestern University Caption Jennika Greer works at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). Credit Dieter Isheim/Northwestern University Usage Restrictions Add credit License Original 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.