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Rheological properties of viscoelastic drops on superamphiphobic substrates

Harrold, Victoria C.; Paven, Maxime; Vollmer, Doris; Sharp, James S.

Authors

Victoria C. Harrold

Maxime Paven

Doris Vollmer

James S. Sharp



Abstract

The rheological properties of microliter sized drops of polymer solutions were investigated using measurements of their mechanical vibrational response. Drops were suspended on superamphiphobic substrates and vibrated by the application of a short mechanical impulse. Surface vibrations were monitored by refracting laser light through the drops and focusing the refracted light onto the surface of a photodiode. Time dependent variations in the photodiode output were Fourier transformed to obtain the frequency and spectral width of the mechanical resonances of the drops. These quantities were related to the frequency dependent shear storage and loss moduli (G′ and G″, respectively) using a simple theoretical model. The resulting rheological properties were found to be in agreement with microrheology measurements of the same solutions. Drop vibration therefore provides a fast and accurate method of quantifying the rheological properties of single drops.

Journal Article Type Article
Publication Date Apr 1, 2016
Journal Langmuir
Print ISSN 0743-7463
Electronic ISSN 1520-5827
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 32
Issue 16
APA6 Citation Harrold, V. C., Paven, M., Vollmer, D., & Sharp, J. S. (2016). Rheological properties of viscoelastic drops on superamphiphobic substrates. Langmuir, 32(16), https://doi.org/10.1021/acs.langmuir.6b00779
DOI https://doi.org/10.1021/acs.langmuir.6b00779
Publisher URL http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.6b00779
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Langmuir, copyright © American Chemical Society after peer review. To access the final edited and published work see http://pubs.acs.org/doi...21/acs.langmuir.6b00779

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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