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Developing Scattering Morphology Resolved Total Internal Reflection Microscopy (SMR-TIRM) for Orientation Detection of Colloidal Ellipsoids

Rashidi, Aidin and Domínguez-Medina, Sergio and Yan, Jiarui and Efremenko, Dmitry S. and Vasilyeva, Alina A. and Doicu, A. and Wriedt, Thomas and Wirth, Christopher L. (2020) Developing Scattering Morphology Resolved Total Internal Reflection Microscopy (SMR-TIRM) for Orientation Detection of Colloidal Ellipsoids. Langmuir, 36 (43), pp. 13041-13050. American Chemical society (ACS). doi: 10.1021/acs.langmuir.0c02482. ISSN 0743-7463.

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Official URL: http://dx.doi.org/10.1021/acs.langmuir.0c02482

Abstract

Micrometer scale colloidal particles experiencing kT scale interactions and suspended in a fluid are relevant to a broad spectrum of applications. Often, colloidal particles are anisotropic, either by design or by nature. Yet, there are few techniques by which kT scale interactions of anisotropic particles can be measured. Herein, we present the initial development of scattering morphology resolved total internal reflection microscopy (SMR-TIRM). The hypothesis of this work is that the morphology of light scattered by an anisotropic particle from an evanescent wave is a sensitive function of particle orientation. This hypothesis was tested with experiments and simulations mapping the scattered light from colloidal ellipsoids at systemically varied orientations. Scattering morphologies were first fitted with a two-dimensional (2D) Gaussian surface. The fitted morphology was parameterized by the morphology’s orientation angle M and aspect ratio MAR. Data from both experiments and simulations show M to be a function of the particle azimuthal angle, while MAR was a sensitive function of the polar angle. This analysis shows that both azimuthal and polar angles of a colloidal ellipsoid could be resolved from scattering morphology as well or better than using bright-field microscopy. The integrated scattering intensity, which will be used for determining the separation distance, was also found to be a sensitive function of particle orientation. A procedure for interpreting these confounding effects was developed that in principle would uniquely determine the separation distance, the azimuthal angle, and the polar angle. Tracking these three quantities is necessary for calculating the potential energy landscape sampled by a colloidal ellipsoid.

Item URL in elib:https://elib.dlr.de/137239/
Document Type:Article
Title:Developing Scattering Morphology Resolved Total Internal Reflection Microscopy (SMR-TIRM) for Orientation Detection of Colloidal Ellipsoids
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Rashidi, AidinChemical and Biomolecular Engineering Department, Case Western Reserve University,UNSPECIFIED
Domínguez-Medina, SergioChemical and Biomolecular Engineering Department, Case Western Reserve University,https://orcid.org/0000-0002-0463-8488
Yan, JiaruiChemical and Biomedical Engineering, Cleveland State UniversityUNSPECIFIED
Efremenko, Dmitry S.dmitry.efremenko (at) dlr.dehttps://orcid.org/0000-0002-7449-5072
Vasilyeva, Alina A.Rosenheim HochschuleUNSPECIFIED
Doicu, A.Adrian.Doicu (at) dlr.deUNSPECIFIED
Wriedt, ThomasUniversität BremenUNSPECIFIED
Wirth, Christopher L.Chemical and Biomolecular Engineering Department, Case Western Reserve University,https://orcid.org/0000-0003-3380-2029
Date:25 October 2020
Journal or Publication Title:Langmuir
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:36
DOI :10.1021/acs.langmuir.0c02482
Page Range:pp. 13041-13050
Publisher:American Chemical society (ACS)
ISSN:0743-7463
Status:Published
Keywords:total internal reflection microscopy, electromagnetic scattering, colloidal particles, scattering morphology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Optical remote sensing
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Efremenko, Dr Dmitry
Deposited On:09 Nov 2020 11:21
Last Modified:01 Dec 2021 03:00

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