Seeing red: Highly sensitive and selective chemical sensing systems were developed for the naked-eye detection of toxic ions by the direct and indirect postgrafting of hydrophilic and hydrophobic chromophores into spherically nanosized cavities of cubic Fm3m monoliths (HOM-C10). This leads to reliable control over the visual detection of toxic metals such as PbII, CdII, SbIII, and HgII ions at a low concentrations (≈10−9 M). DZ= diphenylthiocarbazone.
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Balaji et al. (2006) studied this question.
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