title: Stem-directed growth of highly fluorescent silver nanoclusters for versatile logic devices.
abstract: This work described for the first time the stem-directed growth of silver nanoclusters (AgNCs) with high brightness using the well-chosen hairpin DNA structure. In comparison with the corresponding double-stranded (ds) DNA capped AgNCs, the fluorescence emission of hairpin DNA structure templated AgNCs were lighted up with 12.5-fold enhancement fluorescent intensity by sequence modification with T-loop. It provided a new prospect for precise placement of nanoscale optical elements onto DNA scaffolds. And these DNA protected AgNCs exhibited the base sequence, strand length and microenvironment-dependent fluorescent properties. Benefiting from these properties, versatile logic gates (or, not, inhibit, XNOR, implication) were constructed using different ions as inputs with AgNCs as signal transducer.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Jia
authors.forename: Dongyue
authors.initials: D
authors.lastname: Li
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Ren
authors.forename: Yanchao
authors.initials: Y
authors.lastname: Han
authors.forename: Yong
authors.initials: Y
authors.lastname: Xia
authors.forename: Erkang
authors.initials: E
authors.lastname: Wang
mesh_terms: D039301:Computers, Molecular; D004247:DNA / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009690:Nucleic Acid Conformation; D012834:Silver / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D012834:Silver; D004247:DNA