Microprobe Tip (IMAGE) Istituto Italiano di Tecnologia - IIT Caption The microprobe is made up of a cone-shaped optical fiber whose tip is about 500 nanometers. Credit Istituto italiano di Tecnologia Usage Restrictions the image may only be used with appropriate credit to IIT-Istituto Italiano di Tecnologia 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.