tailieunhanh - Influence of surface plasmon resonance on fluorescence emission of dye-doped nanoparticles

The fluorescence enhancement or quenching is attributed to the increase or decrease of radiative recombination rates, respectively. The parameters of the energy transfer between fluorescent nanoparticles (dye molecules encapsulated in silica nanoparticles) and nano golds have been estimated. The results show that the interactions between nanoparticles depend on the size of both fluorophores (as donors) and gold nanoparticles (as acceptors). | Communications in Physics, Vol. 24, No. 3S2 (2014), pp. 121-129 DOI: INFLUENCE OF SURFACE PLASMON RESONANCE ON FLUORESCENCE EMISSION OF DYE-DOPED NANOPARTICLES CHU VIET HA College of Education, Thai Nguyen University and Institute of Physic, Vietnam Academy of Science and Technology J. C. BROCHON Laboratoire de Biotechnologie et Pharmacologie Appliquee, ENS Cachan, France TRAN HONG NHUNG Institute of Physic, Vietnam Academy of Science and Technology E-mail: thnhung@ Received 20 June 2014 Accepted for publication 20 August 2014 Abstract. The influence of the surface plasmon of gold nanoparticles on the optical properties of the fluorescent nanoparticles in aqueous solution have been investigated. The fluorescence of nanoparticles can be enhanced or quenched in the presence of gold nanoparticles depending on the domination of energy transfer mechanisms: radiating surface plasmon coupling emission or F¨orster energy transfer from fluorescent particles to gold particles, which exciting absorbing plasmon. The fluorescence enhancement or quenching is attributed to the increase or decrease of radiative recombination rates, respectively. The parameters of the energy transfer between fluorescent nanoparticles (dye molecules encapsulated in silica nanoparticles) and nano golds have been estimated. The results show that the interactions between nanoparticles depend on the size of both fluorophores (as donors) and gold nanoparticles (as acceptors). Keywords: dye-poped nanoparticles, surface plasmon resonance, fluorescence. I. INTRODUCTION Surface plasmons are the coupled modes of electromagnetic field and free electrons in metal. The interaction of fluorescent molecules with plasmons in metallic nanostructures and the physical phenomena related to nanoscale confinement of light have attracting the interest of physicists over the past years [1, 2]. Recently, there are a numerous studies of metal-enhanced fluorescence by metal .

• Vật lý
• Communications in Physics
• Influence of surface plasmon resonance
• Fluorescence emission of dye doped nanoparticles
• Dye molecules encapsulated in silica nanoparticles
• Surface plasmon resonance
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