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Two-photon excited surface plasmon enhanced energy transfer between DAPI and gold nanoparticles: opportunities in intra-cellular imaging and sensing

Zhang, Yinan and Birch, David J. S. and Chen, Yu (2011) Two-photon excited surface plasmon enhanced energy transfer between DAPI and gold nanoparticles: opportunities in intra-cellular imaging and sensing. Applied Physics Letters, 99 (10). -. ISSN 0003-6951

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Abstract

We have demonstrated energy transfer between 4'-6-Diamidino-2-phenylindole (DAPI), a commonly used DNA label, and gold nanoparticles under two-photon excitation in solution using fluorescence lifetime imaging microscopy (FLIM). With comparable size and concentration, gold nanorods (GNRs) are shown to provide more efficient energy transfer than gold nanospheres (GNSs). We attribute this transfer enhancement effect to the longitudinal surface plasmon mode of GNRs overlapping with the excitation wavelength. Energy transfer under two-photon excitation between GNRs and DAPI has also been observed in cell culture and found to be in accord with the solution phase results.

Item type: Article
ID code: 35380
Keywords: biomedical optical imaging, cellular biophysics, excited states, fluorescence, gold, nanomedicine, nanoparticles, nanorods, nanosensors, surface plasmon resonance, two-photon processes, CELLS, resonance, TIC - Bionanotechnology, Solid state physics. Nanoscience, Physics and Astronomy (miscellaneous)
Subjects: Science > Physics > Solid state physics. Nanoscience
Department: Faculty of Science > Physics
Technology and Innovation Centre > Bionanotechnology
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Depositing user: Pure Administrator
Date Deposited: 28 Oct 2011 14:17
Last modified: 27 Mar 2014 09:47
URI: http://strathprints.strath.ac.uk/id/eprint/35380

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