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arXiv 1701.07296physics.optics
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荧光溶液中动态光散射特性的研究:等离子体增强流式细胞术的综合研究

Investigations of dynamic light scattering properties in fluorescent solution: A comprehensive study using plasmonic enhanced Flow-Cytometry

Martin Michelswirth, Julia Hengster, Tobias Milde, Thomas Gaumnitz, Natalie Wagner, Patrick Theato, Klaus Liefeith, Thorsten Uphues

摘要:

在这篇文章中,我们提出了一种新的诊断方法,利用流式细胞术研究化合物的纳米粒子样品在溶液中的散射模式从细胞测量检索分析。作为这种技术的一个具体的增强,我们研究以及在荧光溶液(529 nm)中的纳米粒子的散射模式。观察到细胞计数测量的显著增强,支持在细胞图中清楚分辨的颗粒形成的改进分离。本实验中的样品由80 nm柠檬酸盐封端的金纳米颗粒(AuNP)制备。在水溶液中提供2-(二甲基氨基)乙醇(DMAE)使它们稳定。使用波长为488 nm的激光二极管作为流式细胞术测量(FCM)的基本照明。单独进行动态光散射(DLS)测量,并证明与流式细胞术测量非常一致,这两种测量都可以提供有效的尺寸校准。为了进一步分析光传输模拟。它们提供了关于形成荧光溶液FCM与所研究的感兴趣颗粒的相关性的关键过程的信息。从这一点,我们提取的散射过程中,确保相关性的体积性质。

英文摘要:

In this article we present a new diagnostic approach utilizing flow-cytometry to study compounds of nanoparticle samples in solution by analysis of their scattering patterns retrieved from the cytometric measurements. As a specific enhancement of this technique we study as well the scattering pattern of nanoparticles in a fluorescent solution (529 nm). A significant enhancement of the cytometry measurements is observed supporting an improved separation of particle formations that are clearly resolved in the cytograms. The samples in this experiment are prepared from 80 nm citrate-capped gold nanoparticles (AuNP). They are stabilized providing 2-(dimethylamino)ethanol (DMAE) in the aqueous solution. A laser diode with a wavelength of 488 nm is used as fundamental illumination for the flow-cytometry measurements (FCM). Dynamic Light Scattering (DLS) measurements are performed separately and demonstrate a very good agreement with the Flow-Cytometry measurements both of which allow to give an effective size calibration. For further analysis light transport simulations are presented. They provide information on the key-process to form the correlation of the fluorescent solutions FCM to the studied particles of interest. From this we extract the volume nature of the scattering process ensuring the correlation.

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