On‐chip characterization of the viscoelasticity of complex fluids using microcantilevers
Résumé
Due to the need for a microrheometer monitoring the high‐frequency viscoelasticity
of soft matter in situ, we describe a cantilever‐based microrheometer to achieve this
purpose. The elastic and viscous moduli of complex fluids can be measured with an
acceptable accuracy over a high frequency bandwidth of 1‐100 kHz. Some preliminary data
on small samples (~10‐100 μL) of simple Newtonian and viscoelastic polymer and
surfactant solutions showed the ability to measure the dynamic moduli in the range of 0.01‐
10 kPa. This approach will provide a new way to characterize in situ, dynamic
microrheology of minute and trace materials and will advance the field of biorheology,
microfluidics, and polymer processing.
Origine : Fichiers produits par l'(les) auteur(s)
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