RT - Journal Article T1 - Investigation the Influence of Gold, Silver and Copper Nanoparticles on the Absorption and Fluorescence spectra of Rhodamine B Dye JF - opsi YR - 2018 JO - opsi VO - 24 IS - 0 UR - http://opsi.ir/article-1-1431-en.html SP - 881 EP - 884 K1 - Laser Ablation K1 - Rhodamine B Dye K1 - Gold Nanoparticles K1 - Silver Nanoparticles and copper Nanoparticles AB - Absorption and fluorescence spectra of Rhodamine B dye in the absence and presence of gold, silver and copper nanoparticles, are investigated. Because of the spectral overlapping of gold nanoparticles’ absorption and dye’s fluorescence, energy transfer from dye to nanoparticles has occurred and fluorescence of dye-gold nanoparticles mixture as compared with dye alone, is quenched. However, silver and copper nanoparticles caused by fluorescence enhancement of dye. Higher enhancement of the fluorescence intensity of Rhodamine B dye in the proximity of silver nanoparticles respects to copper nanoparticles due to the higher spectral overlapping of dye’s and silver nanoparticles’ absorption. LA eng UL http://opsi.ir/article-1-1431-en.html M3 ER -