Development of laser dye-doped silica nanoparticles embedded optical preform for bio-analysis

I present here the study of optical and fluorescence properties, structure and morphology of silica nanoparticles bearing laser dye molecules are electrostatically attached with high refractive index organic dopant in acrylic optical preform rod. The photo physical fluorescence behaviour of laser dye molecules at the surface of different size and shape of silica nanoparticles has been reported. The interaction of laser dye-nanoparticles, nature of particles, and effect of various sizes and shapes of silica nanoparticles on fluorescence properties has been investigated. The developed optical preform has high potential for possible applications as bio-analysis sensor probe.

I present here the study of photo physical properties, structure and morphology of silica nanoparticles bearing organic laser dye attached with high refractive index organic dopant into acrylic optical preform rod. The silica nanoparticles are spherical, uniform dense and sizes are ∼(50–60) nm inside the preform matrix. The organic laser dye molecules are attached through electrostatic interaction on the surface of silica nanoparticles which are responsible for changing the photo physical properties of fluorescence. The developed optical preform has high potential for possible applications as bioanalytes sensor probe. FE-SEM of silica nanoparticles which was fabricated via in situ method inside the optical preform matrix.Figure optionsDownload high-quality image (104 K)Download as PowerPoint slideHighlights
► Silica nanoparticles of about (50–60) nm in spherical size has been fabricated.
► Organic laser dye was embedded on silica nanoparticles by electrostatic interactions.
► Different high refractive index organic dopants have been used as co-dopant to improve optical quality of acrylic matrix.
► Functional moiety containing acrylic monomer has been polymerisation by water-in-oil-micro-emulsion method.
► Fluorescence intensity of laser dye on silica surface has been enhanced.