Rotational and translational microrheology from shape-anisotropic particles

In this work, we report measurements of the mean squared angular and translational displacements of a colloidal dumbbell immersed in a viscoelastic fluid using digital microscopy. From the mean squared displacements, we obtain the mechanical properties of the media. Both, angular and translational m...

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Bibliographic Details
Published inJournal of physics. Condensed matter Vol. 34; no. 33; pp. 334002 - 334008
Main Authors Arauz-Lara, José Luis, Ramírez-Saíto, Ángeles, Haro-Pérez, Catalina
Format Journal Article
LanguageEnglish
Published England IOP Publishing 17.08.2022
Subjects
dumbbells
polymer solutions
rotational microrheology
videomicroscopy
dumbbell
videomicroscopy
polymer solution
rotational microrheology
confined systems
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Summary:In this work, we report measurements of the mean squared angular and translational displacements of a colloidal dumbbell immersed in a viscoelastic fluid using digital microscopy. From the mean squared displacements, we obtain the mechanical properties of the media. Both, angular and translational motions provide the same viscoelastic complex modulus and agree with that obtained from the translational motion of a spherical probe particle.
Bibliography:JPCM-120045.R2
ObjectType-Article-1
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ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ac768b