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8 `# u1 s$ v; {COVER False-colored scanning electron microscopy image of
6 M; `, Y' I) ~, \: c* ?" vcarbonate-silica "flowers," each ~50 micrometers high. A vast array of similarly
# s* [8 N& M2 d+ o) Pcomplex, well-defined microstructures can be sculpted by manipulating conditions
( x2 J- s/ y$ O8 Ssuch as pH, temperature, and carbon dioxide concentration. With insight into
$ S6 w; g- O2 M. g' V5 U( d4 `* amolecular growth mechanisms, these structures are dynamically steered toward
4 Z. P" i( P. c/ Harbitrary, hierarchically assembled architectures. See pages 822 and 832, as well ) n5 Y$ s. H+ e8 |& i
as a slideshow online. Image: Wim Noorduin and Joanna Aizenberg 4 \" E) ?; n6 I+ ^
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