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    Quantitative interferometric reflectance imaging for the detection and measurement of biological nanoparticles

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    Date Issued
    2017-06-01
    Publisher Version
    10.1364/BOE.8.002976
    Author(s)
    Sevenler, Derin
    Avci, Oguzhan
    Unlu, M. Selim
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    Permanent Link
    https://hdl.handle.net/2144/37745
    Version
    Published version
    Citation (published version)
    Derin Sevenler, Oguzhan Avci, M Selim Unlu. 2017. "Quantitative interferometric reflectance imaging for the detection and measurement of biological nanoparticles." BIOMEDICAL OPTICS EXPRESS, Volume 8, Issue 6, pp. 2976 - 2989 (14). https://doi.org/10.1364/BOE.8.002976
    Abstract
    The sensitive detection and quantitative measurement of biological nanoparticles such as viruses or exosomes is of growing importance in biology and medicine since these structures are implicated in many biological processes and diseases. Interferometric reflectance imaging is a label-free optical biosensing method which can directly detect individual biological nanoparticles when they are immobilized onto a protein microarray. Previous efforts to infer bio-nanoparticle size and shape have relied on empirical calibration using a ‘ruler’ of particle samples of known size, which was inconsistent and qualitative. Here, we present a mechanistic physical explanation and experimental approach by which interferometric reflectance imaging may be used to not only detect but also quantitatively measure bio-nanoparticle size and shape. We introduce a comprehensive optical model that can quantitatively simulate the scattering of arbitrarily-shaped nanoparticles such as rod-shaped or filamentous virions. Finally, we optimize the optical design for the detection and quantitative measurement of small and low-index bio-nanoparticles immersed in water.
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    • ENG: Electrical and Computer Engineering: Scholarly Papers [376]
    • BU Open Access Articles [4757]


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