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THIS WEEK IN SCIENCE

Mesophase shifts In the biomimetic approach for synthesizing materials with nanoscale structures, assemblies of organic molecules serve as templates for assembling an inorganic structure. Firouzi et al. (p. 1138) present an alternative approach for assembling nanocomposite materials, using inorganic ions (silicate anions) that interact strongly with surfactants to form a variety ofmesoscale phases representing silicate analogs of liquid crystals. Variation of temperature and composition can be used to control the phase behavior, and the silicate units can then be irreversibly polymerized to form mesoscale materials.