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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Growth mechanism of silver nanowires synthesized by polyvinylpyrrolidone-assisted polyol reduction
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Growth mechanism of silver nanowires synthesized by polyvinylpyrrolidone-assisted polyol reduction

机译：聚乙烯吡咯烷酮辅助多元醇还原合成银纳米线的生长机理

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摘要

Silver (Ag) nanowires with a pentagonal cross section have been synthesized by polyvinylpyrrolidone (PVP)-assisted polyol reduction in the presence of Pt nanoparticle seeds. The UV-visible absorption spectra and scanning electron microscopy have been used to trace the growth process of the Ag nanowires. X-ray photoelectron spectroscopy investigation further shows that the PVP molecules are adsorbed on the surface of the Ag nanowires through Ag : O coordination. Comparing with the growth process of Ag nanoparticles, a possible growth mechanism of the Ag nanowires has been proposed. It is implied that the PVP molecules are used as both a protecting agent and a structure-directing agent for the growth of Ag nanowires. It is concluded that the five-fold twinning Ag nanoparticles are formed through heterogenous nucleation after the introduction of Pt nanoparticle seeds and then grow anisotropically along the (110) direction, while the growth along (100) is relatively depressed.
机译：具有五边形横截面的银（Ag）纳米线已通过聚乙烯吡咯烷酮（PVP）辅助的多元醇还原在Pt纳米粒子种子存在下合成。紫外可见吸收光谱和扫描电子显微镜已用于追踪Ag纳米线的生长过程。 X射线光电子能谱研究进一步表明，PVP分子通过Ag：O配位被吸附在Ag纳米线的表面。与Ag纳米颗粒的生长过程相比，提出了一种可能的Ag纳米线生长机理。这暗示了PVP分子被用作Ag纳米线生长的保护剂和结构导向剂。结论是，引入Pt纳米粒子种子后，通过异质成核形成五重孪晶Ag纳米粒子，然后沿（110）方向各向异性生长，而沿（100）方向的生长相对较低。

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