Open AccessA Facile Route in Controlling the Optical Absorbance of Polyvinylpyrrolidone-Capped Silver Nanoparticles Via Chemical Reduction Technique
Author(s) -
Marco Laurence M. Budlayan,
Jeanne Phyrre Lagare-Oracion,
Lyka Dela Rosa,
Mikee Joy Rodriguez,
Rey Y. Capangpangan,
Jonathan P. Manigo,
Arnold C. Alguno,
Eleanor Austria,
Susan D. Arco,
Susan D. Arco
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/925/1/012050
Subject(s) - polyvinylpyrrolidone , absorbance , silver nanoparticle , dynamic light scattering , nanoparticle , transmission electron microscopy , fourier transform infrared spectroscopy , chemical engineering , materials science , chemistry , reducing agent , nanostructure , nanotechnology , nuclear chemistry , analytical chemistry (journal) , polymer chemistry , organic chemistry , chromatography , engineering
This work presents the synthesis of silver nanoparticles (AgNPs) capped with polyvinylpyrrolidone (PVP) via a simple chemical reduction approach. A route in controlling the optical absorbance of the AgNPs by varying the concentration of silver precursors, as reflected by the shifts and broadening of the UV-vis spectra of the AgNPs is also highlighted. Dynamic Light Scattering results revealed the narrow and small hydrodynamic size for AgNPs synthesized at low precursor concentration, while multiple hydrodynamic size peaks were observed for AgNPs produced at high precursor concentration. Likewise, Fourier transform-infrared spectroscopy confirmed the successful capping of PVP on the AgNPs through the O and N atoms as potential binding sites. Transmission electron micrographs revealed the formation of spherical PVP-capped AgNPs, having no apparent aggregation observed. A closer inspection of the micrograph showed the subsequent formation of rod-like growth template of the AgNPs, that might lead to the formation of non-spherical silver nanostructures.