Cover Picture Toward Functional Clathrasils Size- and Composition-Controlled Octadecasil Nanocrystals by Desilication (Angew. Chem. Int. Ed. 412008)код для вставкиСкачать
D 3461 International Edition www.angewandte.org 2008–47/41 Touch Sensors R. Saraf and V. Maheshwari Self-Immolative Polymers C. Alexander and W. Wang Artificial Enzymes T. R. Ward ACIEFS 47 (41) 7773–7966 (2008) · ISSN 1433–7851 · Vol. 47 · No. 41 Cover Picture Javier Prez-Ramrez,* Snia Abell, Luis A. Villaescusa, and Adriana Bonilla 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., Prez-Ram#rez 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. Touch Sensors 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. Direct-Band-Gap Semiconductors Polar direct-gap semiconductors Li1xNaxAsS2 (x ¼ 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. Niobium-Doped Nanotubes 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.