Browsing Center for Organic Photonics and Electronics (COPE) by Title
Now showing items 68-87 of 397
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Deep in vivo two-photon imaging of blood vessels with a new dye encapsulated in pluronic nanomicelles
(Georgia Institute of TechnologySociety of Photo-Optical Instrumentation Engineers, 2011-03)The purpose of this work was to validate the use of Pluronic fluorescent nanomicelles for in vivo two-photon imaging of both the normal and the tumor vasculature. The nanomicelles were obtained after encapsulating a ... -
Density fitting and Cholesky decomposition approximations in symmetry-adapted perturbation theory: Implementation and application to probe the nature of π-π interactions in linear acenes
(Georgia Institute of TechnologyAmerican Institute of Physics, 2010-05)Density fitting (DF) approximations have been used to increase the efficiency of several quantum mechanical methods. In this work, we apply DF and a related approach, Cholesky decomposition (CD), to wave function-based ... -
Density fitting of intramonomer correlation effects in symmetry-adapted perturbation theory
(Georgia Institute of TechnologyAmerican Institute of Physics, 2010-07)Symmetry-adapted perturbation theory (SAPT) offers insight into the nature of intermolecular interactions. In addition, accurate energies can be obtained from the wave function-based variant of SAPT provided that intramonomer ... -
Density-functional approaches to noncovalent interactions: A comparison of dispersion corrections (DFT-D), exchange-hole dipole moment (XDM) theory, and specialized functionals
(Georgia Institute of TechnologyAmerican Institute of Physics, 2011-06)A systematic study of techniques for treating noncovalent interactions within the computationally efficient density functional theory (DFT) framework is presented through comparison to benchmarkquality evaluations of binding ... -
Design and demonstration of compact, wide bandwidth coupled-resonator filters on a silicon-on-insulator platform
(Georgia Institute of TechnologyOptical Society of America, 2009-02)We design and fabricate a compact third-order coupled-resonator filter on the silicon-on-insulator platform with focused application for on-chip optical interconnects. The filter shows a large flat bandwidth (3dB 3.3nm), ... -
Development of improved photosensitive polycarbonate systems for the fabrication of microfluidic devices
(Georgia Institute of TechnologyAmerican Vacuum Society, 2003-11)A technique was recently developed for the fabrication of microfluidic devices that involves using thermally sacrificial polymeric materials in conjunction with other conventional microelectronic processes. This method ... -
The diagonal Born-Oppenheimer correction beyond the Hartree-Fock approximation
(Georgia Institute of TechnologyAmerican Institute of Physics, 2003-03)We report on evaluation of the diagonal Born–Oppenheimer correction (DBOC) to the electronic energy with Hartree–Fock (HF) and conventional correlated wave functions for general molecular systems. Convergence of both HF ... -
Diffusion in a nonequilibrium binary mixture of hard spheres swelling at different rates
(Georgia Institute of TechnologyAmerican Institute of Physics, 2009-07)The nonequilibrium dynamics of a probe in a driven binary mixture of effective hard-sphere particles has been measured computationally in molecular dynamics simulations so as to obtain a better understanding of the energy ... -
Dihedral-angle information entropy as a gauge of secondary structure propensity
(Georgia Institute of TechnologyBiophysical Society, 2006-12)Protein structural information can be uncovered using an information-theory-based entropy and auxiliary functions by taking advantage of high-quality correlation plots between the dihedral angles around a residue and those ... -
Dimensional considerations in achieving large quality factors for resonant silicon cantilevers in air
(Georgia Institute of TechnologyAmerican Institute of Physics, 2009-01)This work aims to provide guidelines for designing rectangular silicon cantilever beams to achieve maximum quality factors for the fundamental flexural resonance at atmospheric pressure. The methodology of this work is ... -
Direct imaging through scattering media by use of efficient third-harmonic generation in organic materials
(Georgia Institute of TechnologyOptical Society of America, 2004-11)We report on real-time, time-gated, direct imaging through scattering media with an attenuation of 14 mean-free paths by use of third-harmonic generation in the eye-safe and telecommunication-compatible near-IR spectral ... -
Direct photopatterning of metal oxide structures using photosensitive metallorganics
(Georgia Institute of TechnologyElectrochemical Society, 2004)A novel process employing photosensitive metallorganic precursor materials is used to pattern thin-film mixed-metal oxide structures. In this process a photosensitive metallorganic precursor is coated onto a silicon substrate ... -
Direct writing and characterization of poly(p-phenylene vinylene) nanostructures
(Georgia Institute of TechnologyAmerican Institute of Physics, 2009-12)We report the use of thermochemical nanolithography to convert a precursor polymer film to poly(p-phenylene vinylene) with sub-100 nm spatial resolution, in ambient conditions. The local thermochemical conversion is verified ... -
Disorder effects in the electronic properties of organic solar cells
(Georgia Institute of Technology, 2012-11-02)Bulk heterojunction organic solar cells have a complex physical structure made up of nanoscale domains of donors and acceptors, each of which is a disordered material. Understanding the electronic properties has proved ... -
Dispersion multiplexing with broadband filtering for miniature spectrometers
(Georgia Institute of TechnologyOptical Society of America, 2007-01)We replace the traditional grating used in a dispersive spectrometer with a multiplex holographic grating to increase the spectral range sensed by the instrument. The multiplexed grating allows us to measure three different, ... -
Dissipating the Langevin equation in the presence of an external stochastic potential
(Georgia Institute of TechnologyAmerican Institute of Physics, 2005-03)In the Langevin formalism, the delicate balance maintained between the fluctuations in the system and their corresponding dissipation may be upset by the presence of a secondary, space-dependent stochastic force, particularly ... -
Dynamic optical correlation using localized holography
(Georgia Institute of TechnologyOptical Society of America, 2007-03)A new technique for optical correlation using gated holographic recording is demonstrated. Several persistent holograms are localized within separate slices as close as 33 μm apart along the crystal. Individual holograms ... -
Dynamic, Reversible and Hybrid Materials: Properties and Applications
(Georgia Institute of Technology, 2014-03-13)Dynamic systems that can undergo reversible processes are of great interest for the development of new materials, sensors, and biolabels. The talk will illustrate some of the recent results on soft structures based on metal ... -
Effect of an external electric field on the charge transport parameters in organic molecular semiconductors
(Georgia Institute of TechnologyAmerican Institute of Physics, 2003-12)Internal reorganization energies and interchain transfer integrals are two key parameters governing the charge-transport properties of organic semiconducting materials. Here, in order to model some aspects of device operation ... -
Effect of phosphonic acid surface modifiers on the work function of indium tin oxide and on the charge injection barrier into organic single-layer diodes
(Georgia Institute of TechnologyAmerican Institute of Physics, 2009)We investigate the use of several phosphonic acid surface modifiers in order to increase the indium tin oxide (ITO) work function in the range of 4.90–5.40 eV. Single-layer diodes consisting of ITO/modifier/N,N′-diphenyl ...