Fluorescent aptamer-functionalized graphene oxide biosensor for label-free detection of mercury(II).
Abstract
Label-free fluorescent detection of Hg(2+) has been realized via quenching of fluorescence of graphene oxide (GO). The water-soluble GO sheets, which are functionalized with single-stranded DNA aptamer, exhibit strong fluorescence emission at 600 nm under the excitation of 488 nm in the absence of Hg(2+) ions. When Hg(2+) ions appear in the aqueous solution, Hg(2+) ions are sandwiched between the hairpin-shaped double-stranded DNA due to the...
Paper Details
Title
Fluorescent aptamer-functionalized graphene oxide biosensor for label-free detection of mercury(II).
Published Date
Mar 15, 2013
Volume
41
Pages
889 - 893
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