Mecklenburg-PEET Rendering (IMAGE) University of Southern California Caption In this artist's conception of plasmon energy expansion thermometry (PEET), the focused electron beam is shown penetrating a 100-nm wide, heated aluminum wire atop a thin glass window. The electron beam has sufficient spatial resolution to detect atomic-scale grain boundaries in the poly-crystalline aluminum. Credit USC CEMMA & UCLA Regan Group Usage Restrictions Include image credit 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.