Now showing items 1-20 of 196

    • The three-way switch operation of Rac1/RhoA GTPase-based circuit controlling amoeboid-hybrid-mesenchymal transition 

      Huang, Bin; Lu, Mingyang; Jolly, Mohit Kumar; Tsarfaty, Ilan; Onuchic, José; Ben-Jacob, Eshel (9/23/2014)
      Metastatic carcinoma cells exhibit at least two different phenotypes of motility and invasion - amoeboid and mesenchymal. This plasticity poses a major clinical challenge for treating metastasis, while its underlying ...
    • Can Gap Tuning Schemes of Long-Range Corrected Hybrid Functionals Improve the Description of Hyperpolarizabilities? 

      Garza, Alejandro J.; Osman, Osman I.; Asiri, Abdullah M.; Scuseria, Gustavo E. (9/2/2014)
      Long-range corrected hybrid density functionals (LC-DFT), with range separation parameters optimally tuned to obey Koopmans' theorem, are used to calculate the first-order hyperpolarizabilities of prototypical charge-transfer ...
    • Equilibrium at the edge and atomistic mechanisms of graphene growth 

      Artyukhov, Vasilii I.; Liu, Yuanyue; Yakobson, Boris I. (9/18/2012)
      The morphology of graphene is crucial for its applications, yet an adequate theory of its growth is lacking: It is either simplified to a phenomenological-continuum level or is overly detailed in atomistic simulations, ...
    • Transport mechanism in granular Ni deposited on carbon nanotubes fibers 

      Salvato, M.; Lucci, M.; Ottaviani, I.; Cirillo, M.; Tamburri, E.; Orlanducci, S.; Terranova, M.L.; Notarianni, M.; Young, C.C.; Behabtu, N.; Pasquali, M. (9/12/2012)
      We investigate the transport properties of granular nickel electrodeposited on carbon nanotube fibers by measuring the electrical resistance and the current voltage characteristics as a function of the temperature. The ...
    • Structure of RNA 3'-phosphate cyclase bound to substrate RNA 

      Desai, Kevin K.; Bingman, Craig A.; Cheng, Chin L.; Phillips, George N. Jr.; Raines, Ronald T. (8/26/2014)
      RNA 3′-phosphate cyclase (RtcA) catalyzes the ATP-dependent cyclization of a 3′-phosphate to form a 2′,3′-cyclic phosphate at RNA termini. Cyclization proceeds through RtcA–AMP and RNA(3′)pp(5′)A covalent intermediates, ...
    • How the interplay between mechanical and non-mechanical interactions affects multiple kinesin dynamics 

      Uppulury, Karthik; Efremov, Artem K.; Driver, Jonathan W.; Jamison, D. Kenneth; Diehl, Michael R.; Kolomeisky, Anatoly B. (8/2/2012)
      Intracellular transport is supported by enzymes called motor proteins that are often coupled to the same cargo and function collectively. Recent experiments and theoretical advances have been able to explain certain behaviors ...
    • Plasmonic Polymers Unraveled Through Single Particle Spectroscopy 

      Slaughter, Liane S.; Wang, Lin-Yung; Willingham, Britain A.; Olson, Jana M.; Swanglap, Pattanawit; Dominguez-Medina, Sergio; Link, Stephan (8/13/2014)
      Plasmonic polymers are quasi one-dimensional assemblies of nanoparticles whose optical responses are governed by near-field coupling of localized surface plasmons. Through single particle extinction spectroscopy correlated ...
    • Competing mechanisms and scaling laws for carbon nanotube scission by ultrasonication 

      Pagani, Guido; Green, Micah J.; Poulin, Philippe; Pasquali, Matteo (7/17/2012)
      Dispersion of carbon nanotubes (CNTs) into liquids typically requires ultrasonication to exfoliate individuals CNTs from bundles. Experiments show that CNT length drops with sonication time (or energy) as a power law t?m. ...
    • Paintable Battery 

      Singh, Neelam; Galande, Charudatta; Miranda, Andrea; Mathkar, Akshay; Gao, Wei; Reddy, Arava Leela Mohana; Vlad, Alexandru; Ajayan, Pulickel M. (6/28/2012)
      If the components of a battery, including electrodes, separator, electrolyte and the current collectors can be designed as paints and applied sequentially to build a complete battery, on any arbitrary surface, it would ...
    • Bulk induced phase transition in driven diffusive systems 

      Wang, Yu-Qing; Jiang, Rui; Kolomeisky, Anatoly B.; Hu, Mao-Bin (6/24/2014)
      This paper studies a weakly and asymmetrically coupled three-lane driven diffusive system. A non-monotonically changing density profile in the middle lane has been observed. When the extreme value of the density profile ...
    • Photobleaching Lifetimes of Cyanine Fluorophores Used for Single Molecule Förster Resonance Energy Transfer in the Presence of Various Photoprotection Systems 

      Cooper, David; Uhm, Heui; Tauzin, Lawrence J.; Poddar, Nitesh; Landes, Christy F. (6/17/2013)
      We investigated various photoprotection system combinations to find the combination that optimally extended the photobleach lifetime of a Cy3/Cy5 smFRET pair attached to a DNA hairpin in a single-molecule environment. We ...
    • Development of Morphogen Gradients with Spatially Varying Degradation Rates 

      Teimouri, Hamid; Bozorgui, Behnaz; Kolomeisky, Anatoly B. (2016)
      Successful biological development via spatial and temporal regulations of cell differentiation relies on the action of multiple signaling molecules that are known as morphogens. It is now well established that biological ...
    • Structural and Optical Properties of Discrete Dendritic Pt Nanoparticles on Colloidal Au Nanoprisms 

      Leary, Rowan K.; Kumar, Anjli; Straney, Patrick J.; Collins, Sean M.; Yazdi, Sadegh; Dunin-Borkowski, Rafal E.; Midgley, Paul A.; Millstone, Jill E.; Ringe, Emilie (2016)
      Catalytic and optical properties can be coupled by combining different metals into nanoscale architectures where both the shape and composition provide fine-tuning of functionality. Here, discrete, small Pt nanoparticles ...
    • High Chromaticity Aluminum Plasmonic Pixels for Active Liquid Crystal Displays 

      Olson, Jana; Manjavacas, Alejandro; Basu, Tiyash; Huang, Da; Schlather, Andrea E.; Zheng, Bob; Halas, Naomi; Nordlander, Peter; Link, Stephan (2016)
      Chromatic devices such as flat panel displays could, in principle, be substantially improved by incorporating aluminum plasmonic nanostructures instead of conventional chromophores that are susceptible to photobleaching. ...
    • Impacts of biochar concentration and particle size on hydraulic conductivity and DOC leaching of biochar-sand mixtures 

      Liu, Zuolin; Dugan, Brandon; Masiello, Caroline A.; Barnes, Rebecca T.; Gallagher, Morgan E.; Gonnermann, Helge (2016)
      The amendment of soil with biochar can sequester carbon and alter hydrologic properties by changing physical and chemical characteristics of soil. To understand the effect of biochar amendment on soil hydrology, we measured ...
    • Collective dynamics of processive cytoskeletal motors 

      McLaughlin, R. Tyler; Diehl, Michael R.; Kolomeisky, Anatoly B. (2016)
      Major cellular processes are supported by various biomolecular motors that usually operate together as teams. We present an overview of the collective dynamics of processive cytokeletal motor proteins based on recent ...
    • New Model for Understanding Mechanisms of Biological Signaling: Direct Transport via Cytonemes 

      Teimouri, Hamid; Kolomeisky, Anatoly B. (2016)
      Biological signaling is a crucial natural process that governs the formation of all multicellular organisms. It relies on efficient and fast transfer of information between different cells and tissues. It has been presumed ...
    • Experiments towards size and dopant control of germanium quantum dots for solar applications 

      Oliva-Chatelain, Brittany L.; Barron, Andrew R. (2016)
      While the literature for the doping of silicon quantum dots (QDs) and nanocrystals (NCs) is extensive, reports of doping their germanium analogs are sparse. We report a range of attempts to dope Ge QDs both during and ...
    • Adsorption and Unfolding of a Single Protein Triggers Nanoparticle Aggregation 

      Dominguez-Medina, Sergio; Kisley, Lydia; Tauzin, Lawrence J.; Hoggard, Anneli; Shuang, Bo; Indrasekara, A. Swarnapali D.S.; Chen, Sishan; Wang, Lin-Yung; Derry, Paul J.; Liopo, Anton; Zubarev, Eugene R.; Landes, Christy F.; Link, Stephan (2016)
      The response of living systems to nanoparticles is thought to depend on the protein corona, which forms shortly after exposure to physiological fluids and which is linked to a wide array of pathophysiologies. A mechanistic ...
    • Periodic, Quasi-periodic and Chaotic Dynamics in Simple Gene Elements with Time Delays 

      Suzuki, Yoko; Lu, Mingyang; Ben-Jacob, Eshel; Onuchic, José N. (2016)
      Regulatory gene circuit motifs play crucial roles in performing and maintaining vital cellular functions. Frequently, theoretical studies of gene circuits focus on steady-state behaviors and do not include time delays. In ...