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Microwave-assisted rapid synthesis of anisotropic Ag nanoparticles by solid state transformation
S. Navaladian, Balasubramanian Viswanathan, Thirukkallam Kanthadai Varadarajan, Ram Prasad Viswanath
Published in
2008
Volume: 19
   
Issue: 4
Abstract
Anisotropic silver nanoparticles (NPs) have been synthesized rapidly using microwave irradiation by the decomposition of silver oxalate in a glycol medium using polyvinyl pyrolidone (PVP) as the capping agent. The obtained Ag nanoparticles have been characterized by UV-visible spectroscopy, powder x-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) studies. Anisotropic Ag nanoparticles of average size around 30 nm have been observed in the case of microwave irradiation for 75 s whereas spherical particles of a size around 5-6 nm are formed for 60 s of irradiation. The texture coefficient and particle size calculated from XRD patterns of anisotropic nanoparticles reveal the preferential orientation of (111) facets in the Ag sample. Ethylene glycol is found to be a more suitable medium than diethylene glycol. A plausible mechanism has been proposed for the formation of anisotropic Ag nanoparticles from silver oxalate. © IOP Publishing Ltd.
About the journal
JournalNanotechnology
ISSN09574484
Open AccessNo
Concepts (24)
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    Irradiation
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    MICROWAVES
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    Silver
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    Synthesis (chemical)
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    Transmission electron microscopy
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    X ray diffraction analysis
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    Ag nanoparticles
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    SOLID STATE TRANSFORMATION
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    Nanoparticles
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    Diethylene glycol
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    Nanoparticle
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    Anisotropy
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    Article
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    Calculation
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    COATED PARTICLE
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    Decomposition
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    Microwave irradiation
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    Particle size
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    Phase transition
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    Priority journal
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    Solid state
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    Synthesis
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    Ultraviolet spectroscopy
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    X ray powder diffraction