Ferrofluid microrobot driven by an adjustable magnetic tweezer for soft tissue mechanical measurement (opens in new tab)

Quantitative mapping of tissue mechanical properties is essential for understanding disease progression and guiding therapeutic interventions. However, conventional techniques are constrained by limited spatial coverage and poor mechanical compliance between rigid probes and soft biological tissues. Here, we report an adjustable magnetic tweezer microsystem that actuates a 1 mm vegetable oil–based ferrofluid droplet for in situ mechanical measurement with high spatial coverage and accuracy. T...