43 citations · 74 across the 12 of their papers we have counts for
12 papers
Coupled self-charging and self-propulsion of evaporating sessile droplets
Nitish Singh, Aaron D. Ratschow, Syed N. R. Kazmi +1
Evaporating sessile water droplets universally deposit surface charges while simultaneously becoming self-charged---a phenomenon that remains under-appreciated despite its potentia…
How Spontaneous Electrowetting and Surface Charge affect Drop Motion
Chirag Hinduja, Benjamin Leibauer, Rishi Chaurasia +5
Water drops sliding on hydrophobic surfaces spontaneously separate charges at their rear. It is unclear how this charge separation affects the contact angles of a sliding drop. We…
Mechanisms in Slide Electrification of Liquid and Frozen Drops on Hydrophobic Surfaces
Rutvik Lathia, Benjamin Leibauer, Aaron D. Ratschow +2
The microscopic and fundamental origin of slide electrification, where droplets of water move across insulating surfaces accumulating and depositing electrical charges, is still de…
Spontaneous Coulomb fissions of drops on lubricated surfaces
Marcus Lin, Peng Zhang, Aaron D. Ratschow +3
Charged water drops are more widespread than commonly acknowledged. For example, raindrops typically carry charges of order Q ~ 1 pC, while routine pipetting in the laboratory prod…
Contact line friction of bubbles
Xicheng Bao, Aaron D. Ratschow, Xiaoteng Zhou +9
Contact line friction (CLF) of bubbles is ubiquitous, from bubbles on a beer glass to H2 bubbles sliding over electrodes in electrolysis. However, a fundamental understanding of CL…
Bipolar surface charging by evaporating water droplets
Nitish Singh, Aaron D. Ratschow, Nabeel Aslam +1
Surface charging is a ubiquitous phenomenon with important consequences. On one hand, surface charging underpins emerging technologies such as triboelectric nanogenerators; on the…
Electrostatics slows down the breakup of liquid bridges on solid surfaces
Salar Jabbary Farrokhi, Aaron D. Ratschow, Steffen Hardt
We experimentally study the breakup of water-glycerol liquid bridges on non-conductive surfaces and find that spontaneous charge deposition at the receding contact line, slide elec…
Convection can enhance the capacitive charging of porous electrodes
Aaron D. Ratschow, Alexander J. Wagner, Mathijs Janssen +1
Charge transport in porous electrodes is foundational for modern energy storage technologies like supercapacitors, fuel cells, and batteries. Supercapacitors in particular rely sol…
Gate Electrodes Enable Tunable Nanofluidic Particle Traps
Philippe M. Nicollier, Aaron D. Ratschow, Francesca Ruggeri +4
The ability to control the location of nanoscale objects in liquids is essential for fundamental and applied research from nanofluidics to molecular biology. To overcome their rand…
How charges separate when surfaces are dewetted
Aaron D. Ratschow, Lisa S. Bauer, Pravash Bista +3
Charge separation at moving three-phase contact lines is observed in nature as well as technological processes. Despite the growing number of experimental investigations in recent…
Surface charge deposition by moving drops reduces contact angles
Xiaomei Li, Aaron D. Ratschow, Steffen Hardt +1
Slide electrification - the spontaneous charge separation by sliding water drops - can lead to an electrostatic potential of 1 kV and change drop motion substantially. To find out,…
Resonantly-driven nanopores can serve as nanopumps
Aaron D. Ratschow, Doyel Pandey, Benno Liebchen +2
Inducing transport in electrolyte-filled nanopores with dc fields has led to influential applications ranging from nanosensors to DNA sequencing. Here we use the Poisson-Nernst-Pla…