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Silver nanoparticles: synthesis and size control by electron irradiation

机译：银纳米颗粒：电子辐照的合成和尺寸控制

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Silver nanoparticleswere synthesized by irradiating solutions, prepared by mixing AgNO3 and poly-vinyl alcohol (PVA), with 6 MeV electrons. The electron-irradiated solutions and the thin coatings cast from them were characterized using the ultraviolet - visible (UV-vis), x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques. During electron irradiation, the process of formation of the silver nanoparticles appeared to be initiated at an electron fluence of similar to 2 x 10(13) e cm(-2). This was evidenced from the solution, which turned yellow and exhibited the characteristic plasmon absorption peak around 455 nm. Silver nanoparticles of different sizes in the range 60 - 10 nm, with a narrow size distribution, could be synthesized by varying the electron fluence from 2 x 10(13) to 3 x 10(15) e cm(-2). Silver nanoparticles of sizes in the range 100 - 200 nm were also synthesized by irradiating an aqueous AgNO3 solution with 6 MeV electrons.
机译：通过辐射溶液合成银纳米颗粒，该溶液是通过将AgNO3和聚乙烯醇（PVA）与6 MeV电子混合而制备的。使用紫外线-可见光（UV-vis），X射线衍射（XRD），透射电子显微镜（TEM）和扫描电子显微镜（SEM）技术对电子辐照后的溶液和由此形成的薄涂层进行表征。在电子辐照期间，银纳米颗粒的形成过程似乎是在类似于2 x 10（13）e cm（-2）的电子注量下开始的。这从溶液中得到证明，该溶液变为黄色并在455 nm附近显示出特征性的等离激元吸收峰。可以通过将电子注量范围从2 x 10（13）改变为3 x 10（15）e cm（-2）来合成尺寸范围狭窄的60-10 nm范围内的不同尺寸的银纳米粒子。还通过用6 MeV电子辐照AgNO3水溶液来合成尺寸在100-200 nm范围内的银纳米颗粒。

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