Open AccessTuning Localized Surface Plasmon Resonance (LSPR) of Au-Ag Nanoalloys by Femtosecond Laser
Author(s) -
Affi Nur Hidayah,
Yuliati Herbani
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1436/1/012107
Subject(s) - polyvinylpyrrolidone , surface plasmon resonance , silver nitrate , analytical chemistry (journal) , dissolution , materials science , absorption (acoustics) , femtosecond , irradiation , cuvette , spectrophotometry , nuclear chemistry , chemistry , laser , nanotechnology , chromatography , optics , nanoparticle , polymer chemistry , physics , nuclear physics , composite material
Au-Ag nanoalloys have been synthesized using the photochemical reduction method by femtosecond laser from dissolving of potassium gold (III) chloride (KAuCl 4 ) and silver nitrate (AgNO 3 ) added into a quartz cuvette in various volume ratios with a total volume of 3 ml. The samples were then called Au x Ag y , where x and y were the volume fraction for Au and Ag ions, respectively. The samples were irradiated for 15 minutes of irradiation time and characterized by UV-Vis spectrophotometry to observe the absorption spectra in 300-800 nm range and determine the wavelength at which the Localized Surface Plasmon Resonance (LSPR) peak was observed. The process occurred in a water-only medium, in water medium added with 0.01 wt% polyvinylpyrrolidone (PVP) and in water medium added with 0.1 wt% polyvinylpyrrolidone (PVP). The result showed that LSPR of Au-Ag nanoalloys could be tuned between ∼525 nm for Au and ∼403 nm for Ag in a water-only medium, ∼521 nm for Au and ∼412 for Ag in water medium added with 0.01 wt% PVP and ∼522 nm for Au and ∼419 nm for Ag in water medium added with 0.1 wt% PVP.