Inside Front Cover: Direct Printing of 3D and Curvilinear Micrometer-Sized Architectures into Solid Substrates with Sub-micrometer Resolution (Adv. Mater. 15/2006)



The inside cover shows a hexagonal array of convex microlenses etched directly into glass using a reaction-diffusion process initiated from a hydrogel stamp. The technique, reported by Grzybowski and co-workers on p. 2004, allows for direct printing of complex microarchitectures into a variety of materials with sub-micrometer resolution. The images were generated by longtime exposure of slowly rotating patterns. Cover design by Christopher J. Campbell.