Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Inside Cover: Highly Tunable Superparamagnetic Colloidal Photonic Crystals (Angew. Chem. Int. Ed. 39/2007)
Colloidal photonic crystals with stop bands that can be tuned across the entire visible spectrum region are fabricated by self-assembling highly charged superparamagnetic nanocrystal clusters in an external magnetic field, as described by Y. Yin and co-workers in their Communication on page 7428 ff. The colloidal photonic crystals exhibit a rapid, reversible, and highly tunable optical response to external magnetic fields.