Integral fluorescence enhancement by silver nanoparticles controlled via PMMA matrix

• Published in: Optics communications Vol. 284; no. 1; pp. 494 - 497
• Main Authors: Jie, Yan, Yonghua, Lu, Pei, Wang, Hai, Ming
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 2011; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Emission; Enhanced-fluorescence; Exact sciences and technology; Fluorescence; Integrals; Materials science; Nanocrystalline materials; Nanocrystals and nanoparticles; Nanoparticles; Nanoscale materials and structures: fabrication and characterization; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Physics; Polymethyl methacrylates; Rhodamine; Self assembly; Silver; Silver nanoparticles; Thickness; Thickness; Enhanced-fluorescence; Silver nanoparticles; Organic dye; Glass; Fluorescence; Layer thickness; Nanoparticles; Silver; Self-assembly; PMMA; Dispersed dye; Optical properties; Polymers; Xanthene dye
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2010.09.007

The metal-enhanced fluorescence is measured with different thickness of emission film. Silver nanoparticles are immobilized on glass slide by chemical self-assembly method. Rhodamine B molecules are dispersed in the polymer matrix of Poly(methyl methacrylate) (PMMA), then spin coated on prepared silver particles substrate with different thickness from 15 nm to 70 nm. The enhanced fluorescence is observed depending on the thickness of emission film since the average distance between rhodamine B molecules and silver nanoparticles is altered by the PMMA matrix. The 5-fold enhancement is attained. The experiment was explained qualitatively by an integral fluorescence enhancement.