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arXiv 1504.01047cond-mat.softcond-mat.mtrl-sci
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通过light absorption光谱的全曲线拟合确定的金纳米颗粒的形态。与X射线散射和电子显微镜数据的比较

Morphology of gold nanoparticles determined by full-curve fitting of the light absorption spectrum. Comparison with X-ray scattering and electron microscopy data

Kostyantyn Slyusarenko, Benjamin Abécassis, Patrick Davidson, Doru Constantin

摘要:

紫外-可见吸收光谱常用于表征金纳米颗粒的尺寸和形状。我们提出了一个全光谱模型,产生可靠的结果,为常见的情况下,不同比例的球和棒的混合物。我们确定的两个群体的体积分数,纳米棒的纵横比分布(平均值和方差)和界面阻尼参数。我们通过检查小角度X射线散射和透射电子显微镜数据的拟合结果来验证该模型,并表明正确地考虑纵横比的多分散性对于定量描述纵向等离子体激元峰是必不可少的。

英文摘要:

UV-Vis absorption spectroscopy is frequently used to characterize the size and shape of gold nanoparticles. We present a full-spectrum model that yields reliable results for the commonly encountered case of mixtures of spheres and rods in varying proportions. We determine the volume fractions of the two populations, the aspect ratio distribution of the nanorods (average value and variance) and the interface damping parameter. We validate the model by checking the fit results against small-angle X-ray scattering and transmission electron microscopy data and show that correctly accounting for the polydispersity in aspect ratio is essential for a quantitative description of the longitudinal plasmon peak.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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