Now showing items 1-20 of 38

    • Adaptive fluid-infused porous films with tunable transparency and wettability 

      Yao, Xi; Hu, Yuhang; Grinthal, Alison Elizabeth; Wong, Tak-Sing; Mahadevan, Lakshminarayanan; Aizenberg, Joanna (Nature Publishing Group, 2013)
      Materials that adapt dynamically to environmental changes are currently limited to two-state switching of single properties, and only a small number of strategies that may lead to materials with continuously adjustable ...
    • Bacillus spores as building blocks for stimuli-responsive materials and nanogenerators 

      Chen, Xi; Mahadevan, Lakshminarayanan; Driks, Adam; Sahin, Ozgur (Nature Publishing Group, 2014)
    • Cellular Hydraulics Suggests a Poroelastic Cytoplasm Rheology 

      Moeendarbary, E.; Valon, L.; Fritzsche, M.; Harris, A. R.; Moulding, D. A.; Thrasher, A. J.; Stride, E.; Mahadevan, Lakshminarayanan; Charras, G. T. (Nature Publishing Group, 2013-01-07)
      The cytoplasm represents the largest part of the cell by volume and hence its rheology sets the rate at which cellular shape change can occur. Recent experimental evidence suggests that cytoplasmic rheology can be described ...
    • Chemical and Physical Determinants of Cell Migration 

      Prentice Mott, Harrison Valentine (2014-06-20)
      The phenomenon of directed cell motion in response to external directional cues has drawn significant interest for more than a century, with the first recorded observations of bacterial chemotaxis at the end of the 19th ...
    • Collective Dynamics in Physical and Social Networks 

      Isakov, Alexander (2016-05-03)
      We study four systems where individual units come together to display a range of collective behavior. First, we consider a physical system of phase oscillators on a network that expands the Kuramoto model to include ...
    • Control of Shape and Size of Nanopillar Assembly by Adhesion-Mediated Elastocapillary Interaction 

      Kang, Sung; Pokroy, Boaz; Mahadevan, Lakshminarayanan; Aizenberg, Joanna (American Chemical Society (ACS), 2010)
      Control of self-organization of nanofibers into regular clusters upon evaporation-induced assembly is receiving increasing attention due to the potential importance of this process in a range of applications including ...
    • Digital Instability of a Confined Elastic Meniscus 

      Biggins, John S.; Saintyves, Baudouin; Wei, Zhiyan; Bouchaud, Elisabeth; Mahadevan, Lakshminarayanan (Proceedings of the National Academy of Sciences, 2013)
      Thin soft elastic layers serving as joints between relatively rigid bodies may function as sealants, thermal, electrical, or mechanical insulators, bearings, or adhesives. When such a joint is stressed, even though perfect ...
    • Discovering Communities through Friendship 

      Morrison, Gregory C.; Mahadevan, Lakshminarayanan (Public Library of Science, 2012)
      We introduce a new method for detecting communities of arbitrary size in an undirected weighted network. Our approach is based on tracing the path of closest‐friendship between nodes in the network using the recently ...
    • Discrete Differential Geometry and Physics of Elastic Curves 

      McCormick, Andrew Grady (2013-10-17)
      We develop a general computational model for a elastic rod which allows for extension and shear.
    • Dynamics of evaporative colloidal patterning 

      Kaplan, Cihan Nadir; Wu, Ning; Mandre, Shreyas; Aizenberg, Joanna; Mahadevan, Lakshminarayanan (AIP Publishing, 2015)
      Drying suspensions often leave behind complex patterns of particulates, as might be seen in the coffee stains on a table. Here, we consider the dynamics of periodic band or uniform solid film formation on a vertical plate ...
    • The Dynamics of Sperm Cooperation in a Competitive Environment 

      Fisher, Heidi; Giomi, L.; Hoekstra, Hopi E.; Mahadevan, Lakshminarayanan (The Royal Society, 2014)
      Sperm cooperation has evolved in a variety of taxa and is often considered a response to sperm competition, yet the benefit of this form of collective movement remains unclear. Here we use fine-scale imaging and a minimal ...
    • Elastic Platonic Shells 

      Yong, Ee; Nelson, David R.; Mahadevan, Lakshminarayanan (American Physical Society, 2013)
      On microscopic scales, the crystallinity of flexible tethered or cross-linked membranes determines their mechanical response. We show that by controlling the type, number, and distribution of defects on a spherical elastic ...
    • Elastohydrodynamics of a sliding, spinning and sedimenting cylinder near a soft wall 

      Salez, Thomas; Mahadevan, Lakshminarayanan (Cambridge University Press (CUP), 2015)
      We consider the motion of a fluid-immersed negatively buoyant particle in the vicinity of a thin compressible elastic wall, a situation that arises in a variety of technological and natural settings. We use scaling arguments ...
    • Embracing Compliance and Instabilities to Achieve Function in Mechanical Metamaterials and Devices 

      Overvelde, Johannes (2016-04-26)
      The use of soft materials has led to the development of soft devices that have the potential to be more robust, adaptable, and safer for human interaction than traditional rigid systems. State-of-the-art developments push ...
    • Evolution of Spur-Length Diversity in Aquilegia Petals Is Achieved Solely Through Cell-Shape Anisotropy 

      Puzey, Joshua Robert; Gerbode, S. J.; Hodges, S. A.; Kramer, Elena M.; Mahadevan, Lakshminarayanan (The Royal Society, 2012)
      The role of petal spurs and specialized pollinator interactions has been studied since Darwin. Aquilegia petal spurs exhibit striking size and shape diversity, correlated with specialized pollinators ranging from bees to ...
    • Excitable Patterns in Active Nematics 

      Giomi, Luca; Mahadevan, Lakshminarayanan; Chakraborty, Bulbul; Hagan, Michael (American Physical Society, 2011)
      We analyze a model of mutually propelled filaments suspended in a two-dimensional solvent. The system undergoes a mean-field isotropic-nematic transition for large enough filament concentrations, and the nematic order parameter ...
    • Feedback-Induced Phase Transitions in Active Heterogeneous Conductors 

      Ocko, Samuel A; Mahadevan, Lakshminarayanan (American Physical Society (APS), 2015)
      An active conducting medium is one where the resistance (conductance) of the medium is modified by the current (flow) and in turn modifies the flow, so that the classical linear laws relating current and resistance, e.g., ...
    • Flagellar dynamics of a connected chain of active, polar, Brownian particles 

      Chelakkot, R.; Gopinath, A.; Mahadevan, Lakshminarayanan; Hagan, Marianne L (The Royal Society, 2013)
      We show that active, self-propelled particles that are connected together to form a single chain that is anchored at one end can produce the graceful beating motions of flagella. Changing the boundary condition from a clamp ...
    • Fluid-driven fingering instability of a confined elastic meniscus 

      Biggins, John S.; Wei, Z; Mahadevan, Lakshminarayanan (IOP Publishing, 2015)
      When a fluid is pumped into a cavity in a confined elastic layer, at a critical pressure, destabilizing fingers of fluid invade the elastic solid along its meniscus (Saintyves B. et al., Phys. Rev. Lett., 111 (2013) 047801). ...
    • Gait and speed selection in slender inertial swimmers 

      Gazzola, Mattia; Argentina, Médéric; Mahadevan, Lakshminarayanan (Proceedings of the National Academy of Sciences, 2015)
      Inertial swimmers use flexural movements to push water and generate thrust. We quantify this dynamical process for a slender body in a fluid by accounting for passive elasticity and hydrodynamics and active muscular force ...