Recent Submissions

  • Imidazole-containing triblock copolymers with a synergy of ether and imidazolium sites 

    Jangu, Chainika; Wang, Jing-Han Helen; Wang, Dong; Fahs, Gregory B.; Heflin, James R.; Moore, Robert B.; Colby, Ralph H.; Long, Timothy E. (The Royal Society of Chemistry, 2015-03-06)
    Reversible addition-fragmentation chain transfer (RAFT) polymerization enabled the synthesis of well-defined A-BC-A triblock copolymers containing a synergy of pendant ether and imidazolium sites. The soft central BC block ...
  • Upconverting nanocomposites dispersed in urea-containing acrylics 

    Inglefield, David Lott, Jr.; Merritt, Travis Robert; Magill, Brenden Archie; Long, Timothy E.; Khodaparast, Giti A. (The Royal Society of Chemistry, 2015-05-08)
    Lanthanide-doped upconverting nanoparticles (UCNPs) have the ability to convert low energy photons into high energy photons, making this material appealing for a variety of scientific pursuits, from solar energy conversion ...
  • Systematic Reverse Engineering of Network Topologies: A Case Study of Resettable Bistable Cellular Responses 

    Mondal, Debasish; Dougherty, Edward T.; Mukhopadhyay, Abhishek; Carbo, Adria; Yao, Guang; Xing, Jianhua (Public Library of Science, 2014-08-29)
    A focused theme in systems biology is to uncover design principles of biological networks, that is, how specific network structures yield specific systems properties. For this purpose, we have previously developed a reverse ...
  • Intervalenceband and plasmon optical absorption in heavily doped GaAs:C 

    Songprakob, Wantana; Zallen, Richard H.; Tsu, D. V.; Liu, W. K. (American Institute of Physics, 2002-01-01)
    By using direct numerical-solution techniques for the reflectance (R) and transmittance (T) equations of a multilayer structure, we have analyzed infrared R and T measurements on heavily doped p-type GaAs:C films grown by ...
  • Variational ground state for the periodic Anderson model 

    Bowen, Samuel P.; Mancini, Jay D. (American Institute of Physics, 1988-04-15)
    A variational calculation of the ground state of the Anderson lattice model is discussed. The calculation creates a finite Hamiltonian matrix for many_electron states, which are appropriate for the thermodynamic limit. A ...
  • The role of coulomb interactions in valence transition: Falicov_Kimball model 

    Bowen, Samuel P.; Lady, S. C. (American Institute of Physics, 1984)
    A nonperturbative method of Green function calculation is applied to the Falicov_Kimball model Hamiltonian. In an approximation to first order in the hopping matrix elements, self_consistent solutions for several thermal ...
  • Strongly correlated electron ground_state energy approximations for Anderson_like models 

    Mancini, Jay D.; Potter, Charles D.; Bowen, Samuel P. (American Institute of Physics, 1987-04-15)
    We report preliminary results of convergence properties for nonperturbative resolvent approximations to Anderson_like models of magnetic ions in metals. Our study is initially focused on the spin_ 1/2 Anderson model for ...
  • Improved morphology of polymer-fullerene photovoltaic devices with thermally induced concentration gradients 

    Drees, Martin; Davis, Richey M.; Heflin, James R. (American Institute of Physics, 2005-02-01)
    Gradient concentration profiles for efficient charge transfer and transport can be created in polymer-fullerene organic photovoltaics by thermally induced interdiffusion of an initial bilayer. Prior demonstrations with ...
  • Curie temperature of PdFe films 

    Long, Jerome R.; Mattozzi, Raymond W. (American Institute of Physics, 1984)
    Ferromagnetic ordering of giant moments formed by dilute Fe in Pd host bulk alloys has been the subject of many investigations, but thin films have had little attention. Thin films exhibit evidence of a spin glass phase ...
  • The influence of void space on antireflection coatings of silica nanoparticle self-assembled films 

    Yancey, S. E.; Zhong, W.; Heflin, James R.; Ritter, Alfred L. (American Institute of Physics, 2006-02-01)
    This study investigates the deposition by ionic self-assembly of alternating silica nanoparticle and poly(allyamine hydrochloride) layers with the goal to create a single-material antireflection coating. The condition that ...
  • Time resolved measurements of spin and carrier dynamics in InAs films 

    Kini, Rajeev N.; Nontapot, Kanokwan; Khodaparast, Giti A.; Welser, Roger E.; Guido, Louis J. (American Institute of Physics, 2008-03-15)
    We report time resolved measurements of spin and carrier relaxation in InAs films with carrier densities of 1.3 x 10(16) and 1.6 x 10(16) cm(-3) grown on (001) and (111) GaAs, respectively. We used standard pump-probe and ...
  • On the possible correlation between dark conductivity, photoconductivity, and photorefractivity in dye-doped nematic liquid crystals 

    Klysubun, Prapong; Indebetouw, Guy J. (American Institute of Physics, 2002-09-01)
    The dc conductivity of dye-doped nematic liquid crystal cells exhibits a characteristic transition from a cubic current-voltage relationship at applied voltages smaller than about 1 V to a linear one at voltages larger ...
  • Transient and steady state photorefractive responses in dye-doped nematic liquid crystal cells 

    Klysubun, Prapong; Indebetouw, Guy J. (American Institute of Physics, 2002-02-01)
    The photorefractive response of several dye-doped nematic liquid crystal samples is studied experimentally. Particular attention is given to the observation and modeling of the multiexponential dynamics of the photorefractive ...
  • A revised diagrammatic technique for the degenerate Anderson model 

    Lee, T. K.; Zhang, F. C. (American Institute of Physics, 1984)
    The Goldstone diagrammatic technique developed by Keiter and Kimball for single impurity Anderson model is reformulated. Instead of having the self_energy functions defined on the real axis as the Brillouin_Wigner theory, ...
  • Photoluminescence lineshape and dynamics of localized excitonic transitions in InAsP epitaxial layers 

    Merritt, T. R.; Meeker, M. A.; Magill, B. A.; Khodaparast, Giti A.; McGill, S.; Tischler, J. G.; Choi, S. G.; Palmstrom, C. J. (American Institute of Physics, 2014-05-21)
    The excitonic radiative transitions of InAsxP1-x (x = 0.13 and x = 0.40) alloy epitaxial layers were studied through magnetic field and temperature dependent photoluminescence and time-resolved photoluminescence spectroscopy. ...
  • Spin-filtering effect in the transport through a single-molecule magnet Mn-12 bridged between metallic electrodes 

    Barraza-Lopez, Salvador; Park, Kyungwha; Garcia-Suarez, Victor; Ferrer, Jaime (American Institute of Physics, 2009-04-01)
    Electronic transport through a single-molecule magnet Mn-12 in a two-terminal setup is calculated using the nonequilibrium Green's function method in conjunction with density-functional theory. A single-molecule magnet ...
  • Synthesis and characterization of Co2FeAl nanowires 

    Sapkota, Keshab R.; Gyawali, Parshu; Forbes, Andrew; Pegg, Ian L.; Philip, John (American Institute of Physics, 2012-06-15)
    We report the growth and characterization of Co2FeAl nanowires. Nanowires are grown using electrospinning method and the diameters range from 50 to 500 nm. These nanowires exhibit cubic crystal structure with a lattice ...
  • Magnetic tricritical behavior of ethylammonium tetrachlorocuprate 

    Long, Jerome R.; Haines, Donald N.; Drumheller, John E. (American Institute of Physics, 1988-04-15)
    In order to investigate the prediction by Tuthill that a tricritical point may exist in the phase diagram of spin_flop antiferromagnets with intermediate anisotropy, an experimental reexamination of the phase diagram of ...
  • Photoinduced spin-polarized current in InSb-based structures 

    Frazier, Matthew; Cates, Jonathan G.; Waugh, Justin A.; Heremans, Jean J.; Santos, Michael B.; Liu, Xifan; Khodaparast, Giti A. (American Institute of Physics, 2009-11-15)
    We demonstrate the observation of spin-polarized photocurrent in InSb films grown on GaAs and InP substrates and InSb quantum wells where a nonequilibrium spin population has been achieved by using circularly polarized ...
  • Resistivity and galvanomagnetic coefficients of iron group metallic glasses with chromium substitutions 

    Long, Jerome R.; Hadjipanayis, George C.; Sellmyer, David J. (American Institute of Physics, 1982)
    Magnetic field and temperature dependences of the electrical resistivities and Hall resistivities were measured for the metallic glass ferromagnets Fe13Ni60Cr5Si10B12, Fe37Ni36Cr5Si10B12, Fe81B13.5Si3.5C2, and Fe5Co75Si15B5. ...

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