Holographic characterization of colloidal particles in turbid media
Holographic characterization of colloidal particles in turbid media
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浑浊介质中胶体颗粒的全息表征
DOI：
10.1063/1.4999101
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发表时间：
2017-10-09
影响因子：
4
通讯作者：
Grier, David G.
中科院分区：
文献类型：
--
作者：
Cheong, Fook Chiong;Kasimbeg, Priya;Grier, David G.
全息颗粒表征使用在线全息显微镜和光散射的Lorenz-Mie理论来测量单个胶体颗粒在其天然分散体中的直径和折射率。这些丰富的信息在软物质物理学、生物制药、废水管理和食品科学等领域都被证明是非常宝贵的，但到目前为止，这些信息仅适用于透明介质中的分散体。在这里，我们证明了全息表征可以产生精确和准确的结果，即使当感兴趣的颗粒分散在混浊介质中。通过阐明多重光散射如何有助于全息显微镜成像，我们建立了范围条件下，全息表征可以可靠地探测混浊的样品。我们验证的技术与模型胶体球分散在商业纳米颗粒浆料的测量。(C)2017年作者。所有文章内容，除非另有说明，是根据知识共享署名（CC BY）许可证许可
Holographic particle characterization uses in-line holographic microscopy and the Lorenz-Mie theory of light scattering to measure the diameter and the refractive index of individual colloidal particles in their native dispersions. This wealth of information has proved invaluable in fields as diverse as soft-matter physics, biopharmaceuticals, wastewater management, and food science but so far has been available only for dispersions in transparent media. Here, we demonstrate that holographic characterization can yield precise and accurate results even when the particles of interest are dispersed in turbid media. By elucidating how multiple light scattering contributes to image formation in holographic microscopy, we establish the range conditions under which holographic characterization can reliably probe turbid samples. We validate the technique with measurements on model colloidal spheres dispersed in commercial nanoparticle slurries. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license