Gold Nanoantennas (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Gold triangle nanoparticles paired tip-to-tip in a bow-tie formation, serve as optical antennas. When a protein (green) bound to a fluorescently labeled SOS-catalyst passes through the the gaps between opposing tips of the triangles (plasmonic hot spots) fluorescence is amplified. Credit (Image by Groves, et. al., Berkeley Lab) Usage Restrictions courtesy of Jay Groves, Berkeley Lab, UC Berkeley, HHMI 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.