Quantifying local stiffness and forces in soft biological tissues using droplet optical microcavities.

ABSTRACT: Mechanical properties of biological tissues fundamentally underlie various biological processes and noncontact, local, and microscopic methods can provide fundamental insights. Here, we present an approach for quantifying the local mechanical properties of biological materials at the microscale, based on measuring the spectral shifts of the optical resonances in droplet microcavities. Specifically, the developed method allows for measurements of deformations in dye-doped oil droplets embedded in soft materials or biological tissues with an error of only 1 nm, which in turn enables measurements of anisotropic stress inside tissues as small as a few pN/μm². Furthermore, by applying an external strain, Young's modulus can be measured in the range from 1 Pa to 35 kPa, which covers m

SUBMITTER: Pirnat G 

PROVIDER: S-EPMC10823245 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature