Author/Authors :
Mirzaei, Ali Department of Materials Science and Engineering - Shiraz University, Shiraz , Janghorban, Kamal Department of Materials Science and Engineering - Shiraz University, Shiraz , Hashemi, Babak Department of Materials Science and Engineering - Shiraz University, Shiraz , Bonyani, Maryam Department of Materials Science and Engineering - Shiraz University, Shiraz , Gianluca Leonardi, Salvatore Department of Engineering - University of Messina - Contrada di Dio, Italy , Neri, Giovanni Department of Engineering - University of Messina - Contrada di Dio, Italy
Abstract :
In this study, the size-controlled synthesis of
silver nanoparticles (Ag NPs) via chemical reduction
method by NaBH4 as a reducing agent and poly(vinyl
pyrrolidone) or PVP as a stabilizing agent is reported.
Changing of ratios between reducing agent and stabilizing
agent relative to AgNO3-optimized conditions for synthesis
of stable Ag NPs was studied. The formation of Ag NPs
was tracked by UV–Vis spectroscopy, X-ray diffraction
(XRD), X-ray photoelectron spectroscopy (XPS), and
photoluminescence (PL) spectroscopy. Particle size distribution
was studied by particle size analyzer, and the
morphology was examined by scanning electron microscopy
(SEM) and transmission electron microscopy
(TEM). The optical properties of the synthesized Ag NPs
were also investigated. The optimized Ag NPs were very
stable even after 1 month that was due to effective stabilization
by PVP molecules. The mechanism of Ag NPs
formation and stabilization is discussed in detail.
Keywords :
Ag NPs , PVP , Chemical reduction , Optical properties
