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| One of the noticeable properties of the fluorophore molecules when bound to metal surfaces is the decrease in singlet lifetime as a result of energy transfer from excited dye molecules to bulk metal films. Total quenching of the singlet-excited-state of the chromophores can limit the application of chromophore-labeled metal nano-particles in optoelectronic devices and photonic materials. Interestingly, recent studies on the photophysical properties of chromophore-linked gold nanoparticles from our group and others have suggested a dramatic suppression in the quenching of the singlet-excited-state when these chromophores are densely packed on Au nanoparticle surfaces. |
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