Two-dimensional analysis of gold nanoparticle effects on dye molecule system

Qaradaghi, Vahid; Fathi, Davood

doi:10.1016/j.physb.2012.10.010

Cited by 1 publication

(1 citation statement)

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“…Our experiments were based on hybrid nanostructures composed of GNRs or GNS in the core and Oxazine-725-doped silica in the shell (see Experimental Section), which have been utilized for studies on plasmon-enhanced fluorescence and plasmon–molecule interactions. ,, Because fluorescence can be chemically quenched when fluorophores are located very close (<5 nm) to the metal surface, ,− the thickness of the silica shell in our studies was chosen to be around 20 nm, with which a net fluorescence enhancement can be measured. Wavelength matching is critical when testing the proposed fluorescence enhancement effects induced by the double SPRs of GNRs.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Excitation and Emission Enhancement of Fluorescence Assisted by Double Plasmon Modes of Gold Nanorods

et al. 2013

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Here we propose a scheme utilizing the double plasmon modes of gold nanorod (GNR) to efficiently enhance the fluorescence of surrounding emitters. The transversal and longitudinal surface plasmon resonance (TSPR and LSPR, respectively) modes of GNR are simultaneously utilized to enhance the excitation and emission efficiency, respectively. To demonstrate the idea, GNRs coated with an Oxazine-725 dye molecule-doped silica shell are employed. For comparison, gold nanospheres with the same shell are also studied, of which the single plasmon resonance mode matches only with the excitation wavelength of Oxazine-725. The experimental results, in agreement with theoretical simulations using the discrete dipole approximation method, successfully demonstrate the efficient excitation and emission enhancement of fluorescence assisted by the double SPRs of GNRs.

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