Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture: Toward Functional Clathrasils: Size- and Composition-Controlled Octadecasil Nanocrystals by Desilication (Angew. Chem. Int. Ed. 41/2008)
Like sucking and chewing sweets the action of sodium hydroxide leads to clathrasil nanocrystals by selective silicon dissolution. In the Communication on page 7913 ff., Pérez-Ramírez et al. show that the size, porosity, and composition of octadecasil crystals can be tuned by adjusting the alkaline conditions. This top-down approach could lead to functional clathrasils, opening a new window for research on this type of materials both in terms of post-synthesis modification and application in catalysis.
Also of Interest
Modern touch sensors can detect texture with a similar resolution as a human finger. R. Saraf and V. Maheshwari describe the current status of this research field in their Review on page 7808 ff.
Polar direct-gap semiconductors Li1−xNaxAsS2 (x=0–1) are strong second harmonic generators and display an anomalous band-gap trend. These features are investigated by M. G. Kanatzidis et al. in the Communication on page 7828 ff.
The lattice parameters of parent TiO2 nanotubes are enlarged by doping with niobium. As described by P. Schmuki and co-workers in the Communication on page 7934 ff., this doping enables the intercalation of alkali-metal cations.