Tiny Probes Called BRIGHTS (image) Washington University in St. Louis Caption Nanostructures called BRIGHTs seek out biomarkers on cells and then beam brightly to reveal their locations. In the tiny gap between the gold skin and the gold core of the cleaved BRIGHT (visible to the upper left), there is an electromagnetic hot spot that lights up the reporter molecules trapped there. Credit Naveen Gandra Usage Restrictions Please credit Gandra 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.