Silver Nanoparticle Gradient Arrays: Fluorescence Enhancement of Organic Dyes

摘要: Noble metal nanoparticles show pronounced extinction peaks in the visible wavelength range due to their localized surface plasmon resonances. The excitation of these resonances leads strong confinement electromagnetic energy at nanometer scales, which is critical for ultrasensitive, fluorescence-based detection analytes. strength and spatial distribution this near-field zone depend on particle size, shape, composition. To determine how effects we have prepared nanoparticle gradients centimeter-scale substrates using a colloid-based approach. This plasmonic gradient used study steady-state emission fluorescence lifetime common organic dye that was embedded into monolayer.