A5030664524- Micro and Nano Robotics
- Pickering emulsions and particle stabilization
- Cryospheric studies and observations
- Advanced battery technologies research
- Nonlinear Dynamics and Pattern Formation
- Winter Sports Injuries and Performance
- Orbital Angular Momentum in Optics
- Advanced Materials and Mechanics
- Transition Metal Oxide Nanomaterials
- Electrocatalysts for Energy Conversion
- Adventure Sports and Sensation Seeking
- Modular Robots and Swarm Intelligence
- Magnetic and Electromagnetic Effects
- Supercapacitor Materials and Fabrication
- Arctic and Antarctic ice dynamics
- Catalysis and Oxidation Reactions
John Brown University
2025
Brown University
2022-2024
Providence College
2024
Massachusetts Institute of Technology
2020-2023
Increasing redox reaction rates on carbon electrodes is an important step to reducing the cost of all-vanadium flow batteries (VRFBs). Biomass-derived activated carbons (ACs) hold promise as they may obviate need for post-synthetic modifications common conventional materials. While initial efforts have shown that these materials can enhance VRFB performance, wide selection potentially inexpensive feedstocks and synthesis routes lead a collection electrocatalytic with disparate physical,...
When particles are deposited at a fluid interface they tend to aggregate by capillary attraction minimize the overall potential energy of system. In this work, we embed floating millimetric disks with permanent magnets introduce competing repulsion effect and study their pattern formation in equilibrium. The pairwise landscape two is described short-range long-range (SALR) interaction potential, previously documented number microscopic condensed matter systems. Such interactions enable...
Abstract When a solid body floats at the interface of vibrating liquid bath, motion object generates outwardly propagating surface waves. We here demonstrate that chiral objects on fluid are set into steady rotation, with angular speed and direction rotation controlled by interplay between geometry driving parameters. Scaling laws simplified model wavefield reveal underlying physical mechanism while collapsing measurements velocity across Leveraging control over object’s we an asymmetric...
Liquid water within glacier ice and at the beds exerts a significant control on flow stability through number of processes, including altering rheology lubricating bed. Some this is generated as melt from regions rapid deformation, shear margins, due to heating by viscous dissipation. However, how much meltwater drained margins remains unclear. Here, we apply model that describes evolution temperature, melting, transport deforming estimate flux in glaciers. We temperate zones three Antarctic...
Chiral active particles are able to draw energy from the environment self-propel in form of rotation. We describe an experimental arrangement wherein chiral objects, spinners, floating on surface a vibrated fluid rotate due emitted capillary waves. observe that pairs spinners can assemble at quantized distances via mutually generated wavefield, phase synchronize and, some circumstances, globally about point midway between them. A mathematical model based wave-mediated interactions captures...
When particles are deposited at a fluid interface they tend to aggregate by capillary attraction minimize the overall potential energy of system. In this work, we embed floating millimetric disks with permanent magnets introduce competing repulsion effect and study their pattern formation in equilibrium. The pairwise landscape two is described short-range long-range (SALR) interaction potential, previously documented number microscopic systems. Such interactions enable variety equilibrium...
When a millimetric body is placed atop vibrating liquid bath, the relative motion between object and interface generates outward propagating waves with an associated momentum flux. Prior work has shown that isolated chiral objects, referred to as spinners, can thus rotate steadily in response their self-generated wavefield. Here, we consider case of two co-chiral spinners held at fixed spacing from one another but otherwise free interact hydrodynamically through shared fluid substrate. Two...
Liquid water within glacier ice and at the beds exerts a significant control on flow stability through number of processes, including altering rheology lubricating bed. Some this is generated as melt in regions rapid deformation, shear margins, due to heating by viscous dissipation. However, how much meltwater drained from margins remains unclear. Here, we apply model that describes evolution temperature, melting, transport deforming estimate flux glaciers. We derive analytical expressions...
Macroscopic objects supported by surface tension at the fluid interface can self-assemble through action of capillary forces arising from interfacial deformations. The resulting self-assembled structures are ordered but remain trapped in one potentially many metastable states energy landscape. This contrasts with microscopic colloidal self-assembly where thermal fluctuations excite transitions between geometrically distinct ground-state configurations. We herein utilize supercritical Faraday...
Redox flow batteries (RFBs) are promising technologies for grid-scale energy storage capable of meeting increasing demands, seamlessly integrating intermittent renewable sources into the electric grid, and improving overall grid reliability resilience. However, further cost reductions needed widespread adoption RFBs, thus necessitating advancement critical system components to improve RFB performance. In particular, porous carbon electrode plays a crucial role in RFBs by providing active...
When a solid body floats at the interface of vibrating liquid bath, relative motion between object and generates outwardly propagating surface waves. It has recently been demonstrated that millimetric objects with fore-aft mass asymmetry generate an associated asymmetric wavefield consequently self-propel in unidirectional motion. Harnessing this wave-powered mechanism propulsion, we here demonstrate chiral placed on fluid are set into steady, yet reversible, rotation, angular speed...