title: The quenching effect of silver nanoparticles on 2-amino-3-bromo-1, 4-naphthoquinone using fluorescence spectroscopy.
abstract: Nanoparticles of noble metals belong to the most extensively studied colloidal systems in the field of nanoscience and nanotechnology. Silver nanoparticles of different sizes have been prepared with the chemical reduction method using sodium borohydride and characterized using optical absorption technique. Using optical absorption and fluorescence emission studies, the photo physical properties of 2-amino-3-bromo1, 4-naphthoquinone (ABNQ) on silver nanoparticle have been studied. Concentration of the silver nanoparticle has been evaluated and the particle size dependent interaction between silver nanoparticles and ABNQ has been studied. The fluorescence quantum yield of ABNQ with and without silver nanoparticles has been calculated. The Stern-Volmer quenching constants and the molar absorptivity have been evaluated.
authors.affiliation: Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai 625 021, India. Electronic address: laserstudies@yahoo.in.
authors.forename: P
authors.initials: P
authors.lastname: Manikandan
authors.affiliation: Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai 625 021, India.
authors.forename: S
authors.initials: S
authors.lastname: Pushpam
authors.affiliation: Department of Physics, Avinashilingam University, Coimbatore 641 043, India.
authors.forename: V
authors.initials: V
authors.lastname: Sasirekha
authors.affiliation: Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai 625 021, India.
authors.forename: J Suvetha
authors.initials: JS
authors.lastname: Rani
authors.affiliation: Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai 625 021, India.
authors.forename: V
authors.initials: V
authors.lastname: Ramakrishnan
mesh_terms: D053768:Metal Nanoparticles / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry; D009285:Naphthoquinones / Q000737:chemistry*; D055620:Optical Phenomena; D010316:Particle Size; D011789:Quantum Theory; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D020349:Surface Plasmon Resonance
chemical_list: D009285:Naphthoquinones; D012834:Silver; C035342:1,4-naphthoquinone; D000432:Methanol
keywords: 2-Amino-3-bromo-1; 4-Naphthoquinone; Fluorescence emission; Fluorescence quantum yield; Optical absorption; Silver nanoparticles