The para-aminothiophenol (PATP), in which the thiol groups adsorbed on the Ag surface and the amino groups coordinated with Hg(2+), can mediate the aggregation of sunlight-reduced λ-DNA-templated Ag nanoparticles, resulting in high molecular sensitivity of this hybrid on optical activity. Sub-pM levels of Hg(2+) assays were achieved based on this molecular stepwise assembly.
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Liu et al. (2011) studied this question.
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