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I am interested in the non-equilibrium properties of soft matter. I use experiments, simulations, and the ideas of nonlinear dynamics to study the emergent properties of gels, suspensions, fluids, chemical reactions, and other systems.
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Self-oscillating gels: We study the behavior of gels that change shape in response to chemical waves occurring entirely within the gel. |
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Moving drops with light: We show a new technique for moving drops with a laser beam that uses the non-equilibrium configurations of the charge distribution. This technique obviates the need for complicated photolithography and multiplexing need in other techniques such as electrowetting-on-dielectrics (EWOD). |
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Coupled chemical reactions: We study the interaction of spiral waves in the Belousov–Zhabotinsky reaction using a video feedback method. We find the emergence of new behaviors such as bound pairs with quantized orbits. |
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Drop impact: We study the dynamics of splashing using high speed X-ray imaging and numerical simulations. We find transitions in the number of jets that explain why splashes for different parameters exhibit different size distributions. |
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Faraday waves in Non-Newtonian fluids: We studied the appearance of soliton-like structures in non-Newtonian fluids subjected to vibration. |
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Seed dispersal |
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Vibrated sessile drops |
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Contact line deposits |