Characterization of cerium oxide nanoparticles-Part 1: Size measurements
Characterization of cerium oxide nanoparticles-Part 1: Size measurements
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DOI：
10.1002/etc.1785
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发表时间：
2012-05-01
影响因子：
4.1
通讯作者：
Lead, Jamie R.
中科院分区：
文献类型：
--
作者：
Baalousha, Mohammed;Ju-Nam, Yon;Lead, Jamie R.
本研究概述了在表征纳米材料时需要考虑的一些主要方面。第1部分侧重于使用几种分析技术，如透射电子显微镜，原子力显微镜，动态光散射，X-射线衍射和Brunauer，Emmett和Teller表面积测量的粒度和粒度相关参数的测量，适用于市售的氧化铈纳米颗粒（NP）和微粒（MP）。第2部分（见配套文件）考虑非尺寸相关的表征和分析。结果进行了讨论有关的性质的样品和制备，分析原理，局限性，和每种技术的优点。通过使用不同类型的显微镜、光谱学、分离和其他技术的组合，可以获得关于样品不同部分的颗粒大小的准确信息;这应该为生态毒理学和环境研究提供信息。通过原子力显微镜、透射电子显微镜、X射线衍射和Brunauer、Emmett和Teller测量的NP的初级颗粒尺寸（类似于15 nm）之间的良好一致性表明初级颗粒由半球形单晶形成。对于MP，所有测量都认为它们是在NP（100 nm）以上范围内的大颗粒，在测量的尺寸之间存在一些差异，可能是多分散性效应的结果。此外，我们的研究结果表明，通过离心方法制备的原子力显微镜和透射电子显微镜在低浓度下动态光散射失败时提供一致的数据。Environ.毒理学. Chem.2012; 31：983993。(c)2012年SETAC
The present study gives an overview of some of the major aspects for consideration in the characterization of nanomaterials (NMs). Part 1 focuses on the measurement of particle size and size-related parameters using several analytical techniques such as transmission electron microscopy, atomic force microscopy, dynamic light scattering, X-ray diffraction, and Brunauer, Emmett, and Teller surface area measurements as applied to commercially available cerium oxide nanoparticles (NPs) and microparticles (MPs). Part 2 (see companion paper) considers nonsize-related characterization and analysis. The results are discussed in relation to the nature of the sample and preparation, and the analytical principles, limitations, and advantages of each technique. Accurate information on the particle size of the different fractions of a sample can be obtained by using a combination of different types of microscopy, spectroscopy, separation, and other techniques; this should inform ecotoxicological and environmental studies. The good agreement between the measured primary particle size of the NPs (similar to 15 nm) by atomic force microscopy, transmission electron microscopy, X-ray diffraction, and Brunauer, Emmett, and Teller suggests that the primary particles are formed of semispherical single crystals. For MPs, all measurements agree that they are large particles in the range above the NPs (100 nm), with some difference between the measured sizes, possibly as a result of polydispersity effects. Additionally, our findings suggest that atomic force microscopy and transmission electron microscopy prepared by centrifugation methods provide consistent data at low concentrations when dynamic light scattering fails. Environ. Toxicol. Chem. 2012; 31: 983993. (c) 2012 SETAC