title: Fluorescence enhancement monitoring of pyrromethene laser dyes by metallic Ag nanoparticles.
abstract: Fluorescence enhancement monitoring of pyrromethene laser dyes using their complexation with Ag nanoparticles (Ag NPs) was studied. The size of the prepared Ag NPs was determined by transmission electron spectroscopy and UV/Vis absorption spectroscopy. Mie theory was also used to confirm the size of NPs theoretically. The effect of different nanoparticle concentrations on the optical properties of 1 × 10(-4) M PM dyes shows that 40%of Ag NPs concentration (40%C Ag NPs) in complex is the optimum concentration. Also, the effects of different concentrations of PM dyes in a complex was measured. Emission enhancement factors were calculated for all samples. Fluorescence enhancement efficiencies depended on the input pumping energy of a Nd-YAG laser (wavelength 532 nm and 8 ns pulse duration) were reported and showed the lowest energy (28 and 32 mJ) in the case of PM567 and PM597, respectively.
authors.affiliation: Laser Science and interactions Department, National Institute of Laser enhanced science (NILES), Cairo University, 12316, Egypt.
authors.forename: Mahmoud E M
authors.initials: ME
authors.lastname: Sakr
authors.forename: Maram T H
authors.initials: MT
authors.lastname: Abou Kana
authors.forename: Gamal
authors.initials: G
authors.lastname: Abdel Fattah
mesh_terms: D000465:Algorithms; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D007834:Lasers; D053768:Metal Nanoparticles / Q000737:chemistry*; D011162:Porphobilinogen / Q000031:analogs & derivatives* / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D012984:Software; D013499:Surface Properties
chemical_list: D005456:Fluorescent Dyes; C483535:pyrromethene 567; C504197:pyrromethene 597; D012834:Silver; D011162:Porphobilinogen
keywords: Ag nanoparticles; fluorescence enhancement; optical properties; pyrromethene laser dye; surface plasmon resonance