Dynamic range multiwavelength particle characterization using analytical ultracentrifugation.

Dynamic range multiwavelength particle characterization using analytical ultracentrifugation.
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使用分析超速离心进行动态范围多波长颗粒表征

DOI:
10.1039/c5nr08547k
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发表时间:
2016
期刊:
影响因子:
6.7
通讯作者:
W. Peukert
W. Peukert
中科院分区:
材料科学2区
文献类型:
--
作者:
J. Walter;W. Peukert

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我们展示了复杂的数据分析方法如何使我们能够对通过配备多波长检测器的分析超速离心获得的动态转子速度梯度实验进行多波长评估。我们的数据评估工具 HDR-MULTIFIT 可以准确分析沉降系数分布,并将其转换为粒度分布。通过多波长评估,甚至可以确定复杂混合物的物种相关消光光谱。此外,应用多波长评估和米氏理论,可以将已知光学特性的球形颗粒的光学和流体动力学特性关联起来,从而显着增加实验的动态范围。我们提供了有关我们的方法的操作原理的理论背景,并将多波长分析与传统的单波长分析的性能进行了比较,因为它应用于浊度分析。我们使用 NIST 可追踪参考粒子验证了我们的技术,并表明我们的技术普遍适用于已知和未知光学特性的材料,从而明显扩展了粒子分析的可能性。
We demonstrate how a sophisticated data analysis methodology enables us to perform multiwavelength evaluations of dynamic rotor speed gradient experiments obtained by analytical ultracentrifugation equipped with a multiwavelength detector. Our data evaluation tool HDR-MULTIFIT allows for the accurate analysis of sedimentation coefficient distributions which can be converted to particle size distributions. By means of multiwavelength evaluation, species dependent extinction spectra can be determined even for complex mixtures. Moreover, optical and hydrodynamic properties can be correlated for spherical particles of known optical properties applying multiwavelength evaluation and Mie's theory leading to a significant increase in the dynamic range of the experiment. We provide the theoretical background about the operation principle of our methodology and compare the performance of the multiwavelength analysis to the conventional single wavelength analysis as it is applied in turbidity analysis. We validate our technique using NIST traceable reference particles and show that our technique is universally applicable to materials of known and unknown optical properties, thus clearly extending the possibilities of particle analysis.
DOI: 10.1021/nn503205k
发表时间: 2014-09-01
期刊: ACS NANO
影响因子: 17.1
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通讯作者: Coelfen, Helmut
纳米颗粒的大小,各向异性和密度异质性的表征通过沉积速度。
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影响因子: 7.4
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