Activation device array (IMAGE) University of California - San Diego Caption An array of the activation (or neuron) devices Credit Sangheon Oh/Nature Nanotechnology Usage Restrictions Please credit: Sangheon Oh/Nature Nanotechnology 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.