Quasicrystals (IMAGE) Cornell University Caption A transmission electron microscope image of a mesoporous silica nanoparticle, showing the tiling with triangles and squares, and the Fourier analysis (inset) showing 12-fold symmetry. Credit Lab of Uli Wiesner, Cornell University Usage Restrictions None 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.