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Mesoporous silica: Inside is a vast honeycomb framework of microscopic pores.
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The color changes to indicate that a targeted toxin has been detected and absorbed. Dr. El-Safty has developed materials for a variety of pollutants and radioactive substances.
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Yamauchi Yūsuke succeeded in synthesizing mesoporous Prussian blue by the simple method of mixing water soluble polymers in a Prussian blue solution.
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Surface structure (left) and internal structure (right) of mesoporous Prussian blue.The surface is covered with fine pores, with a larger cavity inside. (Photos courtesy of Yamauchi Yūsuke.)
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Dr. Yamauchi analyzing the crystal structure of mesoporous Prussian blue