Browsing Center for Organic Photonics and Electronics (COPE) by Title
Now showing items 222-241 of 397
-
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
(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
(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
(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
(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
(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
(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
(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 ... -
New Materials for High-Efficiency Organic Light-Emitting Devices (OLEDs) and Solid-State Lighting (SSL)
(Georgia Institute of Technology, 2013-03-12)Fluorescent and phosphorescent organic/organometallic materials are receiving intense interest as emitters in electroluminescent organic light-emitting diodes (OLEDs) for displays and solid-state lighting (SSL). The ... -
A new method for the calculation of the dispersion of nonperiodic photonic crystal waveguides
(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
(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. ... -
New Polymerization Methods for Plastic Electronics
(2015-03-13)Conjugated polymers have received a lot of attention since they combine the best features of metals or semiconductors with those of synthetic polymers. For instance, solar cells based on poly(2,7-carbazole) and ... -
Next-generation microvia and global wiring technologies for SOP
(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
(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
(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
(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
(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
(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
(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
(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 ... -
Nucleation time of nanoscale water bridges
(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 ...