Satarupa Dutta

Technische Universität Darmstadt | TU · Center of Smart Interfaces (CSI)

A method of active transport of a droplet from a carrier liquid to a target liquid is proposed with the aid of electric field. Numerical investigations shed light on the dynamics associated with the active migration of a water droplet across the interface of two weakly conducting oils via application of electric field. With the aid of two model ter...

Experimental investigations with high-speed imaging reveal that two unequal sized oppositely charged droplets suspended in an insulating oil can come in contact in an asymmetric manner under an electric field. The approaching poles of the droplets undergo asymmetric “cone–cone” to “cone–groove” deformations during noncoalescence under an electric f...

The electric field induced motion of a charged water droplet suspended in a low‐dielectric oil medium is exploited to evaluate the rheological properties of the suspending medium. The time‐periodic electrophoretic motions of the droplet between the electrodes decorated in a polymeric micro‐well is translated into a proof‐of‐concept microfluidic pro...

Oscillatory motions of charged particles inside a liquid medium have been explored under the influence of an electric field emulating field-induced particle-laden fluid flows. The properties of the surrounding fluid are found to play key roles in the kinetics of such a particle aggregation process. While the weakly conducting or insulating liquids...

The ratio of protein to creatinine (PCR) in urine is a measure of kidney health of a human body. We report the development of a point-of-care (POC) kidney function test (KFT) kit, which is composed of a paper-based PCR sensor, an opto-electrochemical measurement unit, a display, and a facility to transfer data to a smartphone. For the total protein...

Application of an electric field across the pressure-driven stratified flow of a pair of miscible fluids inside a microchannel manifests interesting electrohydrodynamic (EHD) instabilities. Experiments uncover distinctive instability regimes with an increase in electric field Rayleigh number (Raψ) – a linear-onset regime, a time-periodic nonlinear...

A transmittance based system /kit for point-of-care quantification of biomarker samples comprising: a stage supporting a detection unit, an optical transmittance unit and a signal processing unit. The detection unit comprising reactive substrate is capable of undergoing a specific biomarker sample interactive reaction and generating a quantifiable...