| Issue |
EPJ Web Conf.
Volume 215, 2019
EOS Optical Technologies
|
|
|---|---|---|
| Article Number | 14003 | |
| Number of page(s) | 2 | |
| Section | Optofluidics (OF) – S05: Manipulation | |
| DOI | https://doi.org/10.1051/epjconf/201921514003 | |
| Published online | 10 September 2019 | |
https://doi.org/10.1051/epjconf/201921514003
Design Of An Optofluidic Device For The Measurement Of The Elastic Modulus Of Deformable Particles
1
Department of Chemical, Materials, and Manufacturing Engineering, University of Naples Federico II
2
Department of Mechanical and Aerospace Engineering, Princeton University
* e-mail: massimiliano.villone@unina.it
Published online: 10 September 2019
Suspensions carrying deformable inclusions are ubiquitous in nature and applications. Hence, high-throughput characterization of the mechanical properties of soft particles is of great interest. Recently, a non-invasive optofluidic technique has been developed for the measurement of the interfacial tension between two immiscible liquids [8]. We have adapted such technique to the case of soft solid beads, thus designing a non-invasive optofluidic device for the measurement of the mechanical properties of deformable particles from real-time optical imaging of their deformation.
The device consists of a cylindrical microfluidic channel with a cross-section reduction in which we make initially spherical soft beads flow suspended in a Newtonian carrier. By imaging the deformation of a particle in real time while it goes through the constriction, it is possible to get a measure of its elastic modulus through a theoretically derived-correlation. We provide both experimental and numerical validation of our device.
© The Authors, published by EDP Sciences, 2019
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