Untethered, Ultrasmall Electrode (IMAGE) University of Pittsburgh Caption A laser shining onto an untethered, ultrasmall carbon fiber electrode to stimulate neurons via the photoelectric effect. Credit Photo credit: J. Mater. Chem. B, 2015,3, 4965-4978 - Reproduced by permission of The Royal Society of Chemistry. Usage Restrictions I believe you have to get permission from the Copyright Clearance Center to use this image if you're not the author. https://pubs.rsc.org/en/content/articlelanding/2015/TB/C5TB00108K#!divAbstract 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.