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Cover Picture Toward Functional Clathrasils Size- and Composition-Controlled Octadecasil Nanocrystals by Desilication (Angew. Chem. Int. Ed. 412008)

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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.
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clathrasils, 412008, desilication, octadecasil, towards, nanocrystals, int, cover, angel, chem, controller, size, picture, function, composition
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