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Quenching upon aggregation: 11-Mercaptoundecanoic acid (11-MUA) -protected Au nanoparticles (11-MUA-AuNPs) are much more stable and fluoresce much more strongly than the corresponding unmodified AuNPs. After addition of 2, 6-pyridinedicarboxylic acid, the 11-MUA-AuNPs bind to HgII with both high sensitivity and selectivity. Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2007/z700803ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Huang et al. (Thu,) studied this question.