Abstract
In the present work, the effect of agitation rate on the growth mechanism of silver nanowires is evaluated during polyol process. It was found that increasing the agitation rate leads to the increase in the oxygen transfer rate which in turn enhances the oxidative etching conditions leading to the formation of a variety of nanostructures (nanoparticles, nanorods and nanowires). In light of the obtained experimental results, it can be stated that agitation is not essential for synthesizing silver nanowires by polyol method and it is possible to obtain uniform nanowires with ~200 nm diameters in the length of 20–30 microns several microns length in the stagnant condition. By setting the stirring rate at 200 rpm, it is possible to reduce the nanowires diameters to ~130 nm and the obtained nanostructures are still mono-dispersed. This paper provides complete information about the effect of agitation state on the polyol synthesis of silver nanowires which is truly useful for further studies in this case.
Highlights
Nanomaterials have versatile applications in electronics, biology and optics which are due to the size-dependent properties of these nanodimensional structures [1]
In the present work, the effect of agitation rate on the growth mechanism of silver nanowires is evaluated during polyol process
This paper provides complete information about the effect of agitation state on the polyol synthesis of silver nanowires which is truly useful for further studies in this case
Summary
Nanomaterials have versatile applications in electronics, biology and optics which are due to the size-dependent properties of these nanodimensional structures [1]. Thermodynamic and kinetic aspects of the synthesis process have the main role in shape evolution of metallic nanocrystals. The latter can be enhanced by the application of heating, stirring and oxidative etching [9]. Twinned particles (MTPs) are thermodynamically stable structures, so it is vital to control the kinetic parameters in synthesis processes to obtain nanostructures with desired shapes. The important role of stirring rate on the morphology and optical properties of gold nanorods has been reported by Garcia et al [17]. A survey of the published reports on the polyol synthesis of silver nanowires provides limited clues on the possible interaction of agitation state of system on the final morphology and size of the obtained nanostructures. Authors provide complete information about the effect of agitation states on the polyol synthesis of silver nanowires which is truly useful for further studies in this case
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