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

J. H. Guo; L. Z. Liu; X. B. Zhu; X. L. Wu; Paul K. Chu

doi:10.1063/1.4871102

Author(s)

J. H. Guo
L. Z. Liu
X. B. Zhu
X. L. Wu
Paul K. Chu

Detail(s)

Original language	English
Article number	141910
Journal / Publication	Applied Physics Letters
Volume	104
Issue number	14
Publication status	Published - 7 Apr 2014

Link(s)

DOI	DOI https://doi.org/10.1063/1.4871102 Final Published version
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Attachment(s)	Documents 5861374.pdf Final Published version, 3.62 MB, PDF Publisher's Copyright Statement This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in J. H. Guo, L. Z. Liu, X. B. Zhu, X. L. Wu, and Paul K. Chu , "Enhanced fluorescence from dye molecules by Au nanoparticles on asymmetric double-stranded DNA and mechanism", Appl. Phys. Lett. 104, 141910 (2014) and may be found at https://doi.org/10.1063/1.4871102.
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84899011293&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(c6b1b176-2f4b-44b2-9c32-3ca25bc3cf58).html

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.