863
Assembly of polygonal nanoparticle clusters directed by reversible noncovalent bonding interactions, (M. A. Olson, A. Coskun, R. Klajn, L. Fang, S. K. Dey, K. P. Browne, B. A. Grzybowski, J. F. Stoddart), Nano Lett. 2009, 9, 3185–3190.