Determination of the size distribution of non-spherical nanoparticles by electric birefringence-based methods.
Determination of the size distribution of non-spherical nanoparticles by electric birefringence-based methods.
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DOI：
10.1038/s41598-018-27840-0
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发表时间：
2018-06-22
影响因子：
4.6
通讯作者：
Jiménez ML
中科院分区：
文献类型：
--
作者：
Arenas-Guerrero P;Delgado ÁV;Donovan KJ;Scott K;Bellini T;Mantegazza F;Jiménez ML
原位测定分散的非球形纳米粒子的尺寸分布是研究和使用胶体悬浮液的重要表征工具。在这项工作中，我们测试了一种基于测量脉冲电场在色散中引起的双折射瞬态行为的尺寸表征方法。这种松弛的具体形状取决于悬浮颗粒的旋转扩散系数的分布。我们使用三种方法分析测量的瞬态双折射：拉伸指数法、Watson-Jennings 法和多指数法。这些适用于六种不同类型的棒状和平面颗粒：PTFE 棒、针铁矿针、单壁和双壁碳纳米管、钠蒙脱石颗粒和三水铝石片。将结果与电子显微镜和动态光散射测量进行比较。这里考虑的方法在所有情况下都提供了良好或优异的结果，证明瞬态双折射分析是获得悬浮液中非球形颗粒的完整尺寸分布的有力工具。
The in situ determination of the size distribution of dispersed non-spherical nanoparticles is an essential characterization tool for the investigation and use of colloidal suspensions. In this work, we test a size characterization method based on the measurement of the transient behaviour of the birefringence induced in the dispersions by pulsed electric fields. The specific shape of such relaxations depends on the distribution of the rotational diffusion coefficient of the suspended particles. We analyse the measured transient birefringence with three approaches: the stretched-exponential, Watson-Jennings, and multi-exponential methods. These are applied to six different types of rod-like and planar particles: PTFE rods, goethite needles, single- and double-walled carbon nanotubes, sodium montmorillonite particles and gibbsite platelets. The results are compared to electron microscopy and dynamic light scattering measurements. The methods here considered provide good or excellent results in all cases, proving that the analysis of the transient birefringence is a powerful tool to obtain complete size distributions of non-spherical particles in suspension.
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影响因子：
3.9
作者：
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