SEM images (image) Hokkaido University Share Print E-Mail Caption Scanning electron microscope (SEM) images of the nano-butterfly structure before (left) and after (right) laser irradiation. Semiconductor zinc oxide has crystalized on the surface of the gold nanorod. Credit Fujiwara H., et al, Nano Letters. December 23, 2019. Usage Restrictions This image is copyrighted and can be used for reporting this press release if properly credited. Share Print E-Mail 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.