Reaction Took Place in a Ball Mill (IMAGE) Hokkaido University Caption Reaction mixtures before and after grinding in a ball mill. Mechanoredox arylation reactions occurred with aryl diazonium salts and furan in the presence of a piezoelectric material (BaTiO3). (Kubota K. et al. Science, Dec. 19, 2019) Credit Kubota K. et al. <em>Science</em>, December 19, 2019 Usage Restrictions These images are copyrighted and can be used for reporting this research work without obtaining a permission if credited properly. 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.