Toehold-Mediated Internal Control to Probe the Near-Field Interaction between Metallic Nanoparticle and Fluorophore
نویسندگان
چکیده
منابع مشابه
C4nr03643c 12515..12523 ++
Metallic nanoparticles (MNPs) are known to alter the emission of vicinal fluorophores through the nearfield interaction, leading to either fluorescence quenching or enhancement. Much ambiguity remains in the experimental outcome of such a near-field interaction, particularly for bulk colloidal solution. It is hypothesized that the strong far-field interference from the inner filter effect of th...
متن کاملA plasmonic hybrid nanostructure with controlled interaction strength
39 Abstract—We describe a novel plasmonic hybrid nanostructure based on a silver island film covered with a dielectric silica layer. The thickness of the silica layer is varied from 0 to approximately 46 nm on a single sample, thus allowing for continuous variation of the interaction strength between plasmon excitations in the metallic film and the excited states of pigments comprising photosyn...
متن کاملDesign and fabrication of a high-Q near-field probe for subsurface crack detection
Non-destructive detection and evaluation of invisible cracks in metal structures is an important matter in several critical environments including ground transportation, air transportation and power plants. In this paper, a high-Q near-field Microwave probe is designed and fabricated using defected ground structures for surface and subsurface crack detection in metal structures. For this purpos...
متن کاملPlasmon-controlled fluorescence towards high-sensitivity optical sensing.
Fluorescence spectroscopy is widely used in chemical and biological research. Until recently most of the fluorescence experiments have been performed in the far-field regime. By far-field we imply at least several wavelengths from the fluorescent probe molecule. In recent years there has been growing interest in the interactions of fluorophores with metallic surfaces or particles. Near-field in...
متن کاملInteraction of radially polarized focused light with a prolate spheroidal nanoparticle.
The interaction of a nanoparticle with light is affected by nanoparticle geometry and composition, as well as by focused beam parameters, such as the polarization and numerical aperture of the beam. The interaction of a radially focused beam with a prolate spheroidal nanoparticle is particularly important because it has the potential to produce strong near-field electromagnetic radiation. Stron...
متن کامل