Primary particle diameter differentiation and bimodality identification by five analytical methods using gold nanoparticle size distributions synthesized by pulsed laser ablation in liquids
Primary particle diameter differentiation and bimodality identification by five analytical methods using gold nanoparticle size distributions synthesized by pulsed laser ablation in liquids
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使用液体中脉冲激光烧蚀合成的金纳米颗粒尺寸分布，通过五种分析方法进行初级粒径区分和双峰识别
DOI：
10.1016/j.apsusc.2017.11.130
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发表时间：
2018
影响因子：
6.7
通讯作者：
S. Barcikowski
中科院分区：
文献类型：
--
作者：
A. Letzel;B. Gökce;A. Menzel;A. Plech;S. Barcikowski
对于已知材料，纳米颗粒胶体的尺寸分布是定义其性质的关键参数。然而，测量的尺寸分布不容易解释，因为必须考虑加权（例如，通过光吸收、散射强度、体积、表面、数量）和获得尺寸信息的方式。悬浮的纳米颗粒的半径可以作为例如球当量、流体动力学、Feret或回转半径给出。在这项研究中，金纳米粒子在水中合成的脉冲激光烧蚀（LAL）和破碎（LFL）的液体和表征的各种技术（扫描透射电子显微镜（STEM），小角X射线散射（SAXS），分析盘离心（ADC），动态光散射（DLS）和紫外-可见光谱与米根斯理论）研究不同分析技术的可比性，并确定与激光生成纳米颗粒相关的给定任务的首选方法。特别地，已知激光生成的胶体是双峰和/或多分散的，但双峰性有时在文献中不能解析。此外，经常报告的约10 nm的初级颗粒模式的小尺寸偏移需要评价其与分析方法相关的统计学显著性。密切相关的SAXS早期的研究，不同的胶体在规定的比例进行混合，其大小作为一个函数的名义混合比进行了分析。据发现，推导出的粒度是独立的标称混合比，如果胶体尺寸分数不重叠相当大。相反，具有重叠尺寸级分的胶体的所获得的尺寸强烈地取决于标称混合比，因为大多数方法不能区分这些级分。总的来说，SAXS和ADC是非常准确的粒度分析方法。此外，不同方法的能力，以确定名义混合比的大小部分进行了实验研究。
For a known material, the size distribution of a nanoparticle colloid is a crucial parameter that defines its properties. However, measured size distributions are not easy to interpret as one has to consider weighting (e.g. by light absorption, scattering intensity, volume, surface, number) and the way size information was gained. The radius of a suspended nanoparticle can be given as e.g. sphere equivalent, hydrodynamic, Feret or radius of gyration. In this study, gold nanoparticles in water are synthesized by pulsed-laser ablation (LAL) and fragmentation (LFL) in liquids and characterized by various techniques (scanning transmission electron microscopy (STEM), small-angle X-ray scattering (SAXS), analytical disc centrifugation (ADC), dynamic light scattering (DLS) and UV–vis spectroscopy with Mie-Gans Theory) to study the comparability of different analytical techniques and determine the method that is preferable for a given task related to laser-generated nanoparticles. In particular, laser-generated colloids are known to be bimodal and/or polydisperse, but bimodality is sometimes not analytically resolved in literature. In addition, frequently reported small size shifts of the primary particle mode around 10 nm needs evaluation of its statistical significance related to the analytical method. Closely related to earlier studies on SAXS, different colloids in defined proportions are mixed and their size as a function of the nominal mixing ratio is analyzed. It is found that the derived particle size is independent of the nominal mixing ratio if the colloid size fractions do not overlap considerably. Conversely, the obtained size for colloids with overlapping size fractions strongly depends on the nominal mixing ratio since most methods cannot distinguish between such fractions. Overall, SAXS and ADC are very accurate methods for particle size analysis. Further, the ability of different methods to determine the nominal mixing ratio of sizes fractions is studied experimentally.
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影响因子：
4.6
作者：
Ibrahimkutty S;Wagener P;dos Santos Rolo T;Karpov D;Menzel A;Baumbach T;Barcikowski S;Plech A
通讯作者：
Plech A
影响因子：
3.2
作者：
M. Sztucki;T. Narayanan;G. Beaucage
通讯作者：
M. Sztucki;T. Narayanan;G. Beaucage
影响因子：
3.3
作者：
Rehbock, Christoph;Merk, Vivian;Barcikowski, Stephan
通讯作者：
Barcikowski, Stephan
通过小角 X 射线散射和透射电子显微镜推断的粒度分布
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
T. Rieker;A. Hanprasopwattana;A. Datye;P. Hubbard
通讯作者：
P. Hubbard
影响因子：
9.9
作者：
B. Saunders
通讯作者：
B. Saunders