Now showing items 212-231 of 376

    • N,N-Dimethyl-N'-[(1E,2E)-3-(4-nitrophenyl)prop-2-enylidene]benzene-1,4-diamine and N,N-dimethyl-4-[(1E,3E)-4-(4-nitrophenyl)buta-1,3-dienyl]-1-naphthylamine 

      Nesterov, Volodymyr V.; Suina, Andrea; Antipin, Mikhail Yu; Timofeeva, Tatiana V.; Barlow, Stephen; Marder, Seth R. (Georgia Institute of TechnologyInternational Union of Crystallography, 2003-11)
      Syntheses and X-ray structural investigations have been carried out for the two title compounds, viz. C(17)H(17)N(3)O(2), (I), and C(22)H(20)N(2)O(2), (II). The molecular skeleton of (I) is slightly non-planar; the dihedral ...
    • Nanomaterial transfer using hot embossing for flexible electronic devices 

      Allen, Ashante; Sunden, Erik Oscar; Cannon, Andrew; Graham, Samuel; King, William P. (Georgia Institute of TechnologyAmerican Institute of Physics, 2006-02-26)
      We demonstrate hot embossing to pattern carbon nanotubes (CNTs) on flexible substrates. Patterns of CNTs grown on both microtextured and flat silicon templates were transferred into polymer substrates, with good replication ...
    • Nanoscopic friction as a probe of local phase transitions 

      Szoszkiewicz, Robert; Riedo, Elisa (Georgia Institute of TechnologyAmerican Institute of Physics, 2005-07)
      We study nanoscopic friction forces between an atomic force microscope tip and a glass sample. We show how and why it is possible to tune friction forces in a predictable way by changing either the sample temperature, or ...
    • The nature of singlet excitons in oligoacene molecular crystals 

      Yamagata, H.; Norton, J.; Hontz, E.; Olivier, Y.; Beljonne, David; Brédas, Jean-Luc; Silbey, R. J.; Spano, F. C. (Georgia Institute of TechnologyAmerican Institute of Physics, 2011-03)
      A theory for polarized absorption in crystalline oligoacenes is presented, which includes Frenkel exciton coupling, the coupling between Frenkel and charge-transfer (CT) excitons, and the coupling of all neutral and ionic ...
    • Near net-shape/net-dimension ZrC/W-based composites with complex geometries via rapid prototyping and Displacive Compensation of Porosity 

      Lipke, David W.; Zhang, Yunshu; Liu, Yajun; Church, Benjamin C.; Sandhage, Kenneth H. (Georgia Institute of TechnologyElectrochemical Society, 2010-08)
      ZrC/W-based composite:. with complex shapes have been fabricated by combining rapid prototyping methods for synthesizing porous WC preforms with the shape/dimension-preserving, reactive infiltration-based Displacive ...
    • Negative tone molecular resists using cationic polymerization: Comparison of epoxide and oxetane functional groups 

      Lawson, Richard A.; Noga, David E.; Younkin, Todd R.; Tolbert, Laren M.; Henderson, Clifford L. (Georgia Institute of TechnologyAmerican Vacuum Society, 2009-11)
      Two molecular resists with a common molecular glass core were synthesized and characterized to compare the differences between epoxide (oxirane) and oxetane functional groups for use in high resolution negative tone molecular ...
    • Nematic biaxiality in a bent-core material 

      Yoon, Hyung Guen; Kang, Shin-Woong; Dong, Ronald Y.; Marini, Alberto; Suresh, Kattera A.; Srinivasarao, Mohan; Kumar, Satyendra (Georgia Institute of TechnologyAmerican Physical Society, 2010-05)
      The results of a recent investigation of the nematic biaxiality in a bent-core mesogen _A131_ are in apparent disagreement with earlier claims. Samples of mesogen A131 used in the two studies were investigated with polarized ...
    • A new method for the calculation of the dispersion of nonperiodic photonic crystal waveguides 

      Jafarpour, Aliakbar; Reinke, Charles M.; Adibi, Ali; Xu, Yong; Lee, Reginald K. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2004-08)
      We present a new method for the calculation of the dispersion diagrams of general nonuniform waveguides. The method is based on the spatial Fourier transform (SFT) of the electromagnetic field distribution along the ...
    • A new method for wideband characterization of resonator-based sensing platforms 

      Munir, Farasat; Wathen, Adam; Hunt, William D. (Georgia Institute of TechnologyAmerican Institute of Physics, 2011-03)
      A new approach to the electronic instrumentation for extracting data from resonator-based sensing devices (e.g., microelectromechanical, piezoelectric, electrochemical, and acoustic) is suggested and demonstrated here. ...
    • Next-generation microvia and global wiring technologies for SOP 

      Sundaram, Venky; Tummala, Rao R.; Liu, Fuhan; Kohl, Paul A.; Li, Jun; Bidstrup-Allen, Sue Ann; Fukuoka, Yoshitaka (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2004-05)
      As microsystems continue to move toward higher speed and microminiaturization, the demand for interconnection density both on the IC and the package levels increases tremendously. The 2002 ITRS roadmap update identifies ...
    • Nitrogen- and Boron-Doped Carbon Nanotube Electrodes in a Thermo-Electrochemical Cell 

      Salazar, Pablo F.; Kumar, Satish; Cola, Baratunde A. (Georgia Institute of TechnologyElectrochemical Society, 2012)
      We explore the prospects of using doped carbon nanotube (CNT) electrodes to increase the output power of thermo-electrochemical cells (TECs). CNT buckypaper electrodes doped with nitrogen and boron were characterized using ...
    • Nonequilibrium heat flows through a nanorod sliding across a surface 

      Popov, Alexander V.; Viehman, Douglas C.; Hernandez, Rigoberto (Georgia Institute of TechnologyAmerican Institute of Physics, 2011-03)
      The temperature-ramped irreversible Langevin equation [A. V. Popov and R. Hernandez, J. Chem. Phys. 134, 244506 (2007)] has been seen to describe the nonequilibrium atomic oscillations of a nanorod dragged across a surface. ...
    • Nonionic photoacid generator behavior under high-energy exposure sources 

      Lawson, Richard A.; Noga, David E.; Tolbert, Laren M.; Henderson, Clifford L. (Georgia Institute of TechnologySociety of Photo-optical Instrumentation Engineers (SPIE), 2009-10)
      A series of nonionic photoacid generators (PAGs) are synthesized and their acid generation efficiency measured under deep ultraviolet (DUV) and electron beam exposures. The acid generation efficiency is determined with an ...
    • Nonlinear finite-difference time-domain method for the simulation of anisotropic, chi((2)), and chi((3)) optical effects 

      Reinke, Charles M.; Jafarpour, Aliakbar; Momeni, Babak; Soltani, Mohammad; Khorasani, Sina; Adibi, Ali; Xu, Yong; Lee, Reginald K. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers ; Optical Society of America, 2006-01)
      A two-dimensional (2-D) finite-difference timedomain (FDTD) code for the study of nonlinear optical phenomena, in which both the slowly varying and the rapidly varying components of the electromagnetic fields are considered, ...
    • Nonlinear optical properties of induced transmission filters 

      Owens, Daniel T.; Fuentes-Hernandez, Canek; Hales, Joel M.; Perry, Joseph W.; Kippelen, Bernard (Georgia Institute of TechnologyOptical Society of America, 2010-08)
      The nonlinear optical (NLO) properties of induced transmission filters (ITFs) based on Ag are experimentally determined using white light continuum pump-probe measurements. The experimental results are supported using ...
    • Nonlinear Viscoelastic Dynamics of Nanoconfined Wetting Liquids 

      Li, Tai-De; Riedo, Elisa (Georgia Institute of TechnologyAmerican Physical Society, 2008-03)
      The viscoelastic dynamics of nanoconfined wetting liquids is studied by means of atomic force microscopy. We observe a nonlinear viscoelastic behavior remarkably similar to that widely observed in metastable complex ...
    • Nucleation time of nanoscale water bridges 

      Szoszkiewicz, Robert; Riedo, Elisa (Georgia Institute of TechnologyAmerican Physical Society, 2005-09)
      Water capillaries bind together grains of sand. They also can bind an atomic force microscope tip to a substrate. The kinetics of capillary condensation at the nanoscale is studied here using friction force microscopy. At ...
    • Nucleation time of nanoscale water bridges 

      Szoszkiewicz, Robert; Riedo, Elisa (Georgia Institute of TechnologyAmerican Physical Society, 2007-03)
      Water capillaries bind together grains of sand. They also can bind an atomic force microscope tip to a substrate. The kinetics of capillary condensation at the nanoscale is studied here using friction force microscopy. At ...
    • Object localization in the presence of a strong heterogeneous background in fluorescent tomography 

      Mohajerani, Pouyan; Eftekhar, Ali Asghar; Adibi, Ali (Georgia Institute of TechnologyOptical Society of America, 2008-06)
      We propose a method for object localization in fluorescent tomography (FT) in the presence of a highly heterogeneous background. Existing approaches typically assume a homogeneous background distribution; thus, they are ...
    • Observation of large parity-change-induced dispersion in triangular-lattice photonic crystal waveguides using phase sensitive techniques 

      Huang, Jiandong; Reinke, Charles M.; Jafarpour, Aliakbar; Momeni, Babak; Soltani, Mohammad; Adibi, Ali (Georgia Institute of TechnologyAmerican Institute of Physics, 2006-02)
      We experimentally studied W1 triangular-lattice photonic crystal waveguides (PCWs) fabricated on semiconductor-on-insulator substrates using phase-sensitive lock-in techniques. In addition to the improved signal-to-noise ...