Enhanced fluorescence from dye molecules by Au nanoparticles on asymmetric double-stranded DNA and mechanism

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Article number141910
Journal / PublicationApplied Physics Letters
Volume104
Issue number14
Publication statusPublished - 7 Apr 2014

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Abstract

Gold nanoparticles (NPs) prepared on asymmetric DNA double helical structures show some twinning structures and sharp corners because of the low processing temperature. The distance between individual NPs varies between 2 and 4 nm, and these NPs form clusters with a size of ∼40 nm. The DNA structures also provide docking sites for the fluorescent dye. The dependence of the fluorescence enhancement on the distance between the NPs and dye molecules is investigated. The maximum enhancement factor is 5.8 when the distance between the dye and Au NP surface is 3.4 nm and the results are consistent with theoretical simulation. © 2014 AIP Publishing LLC.

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Enhanced fluorescence from dye molecules by Au nanoparticles on asymmetric double-stranded DNA and mechanism. / Guo, J. H.; Liu, L. Z.; Zhu, X. B. et al.
In: Applied Physics Letters, Vol. 104, No. 14, 141910, 07.04.2014.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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