Tags: computational chemistry

Online Presentations (1-13 of 13)

  1. Calculating Resonances Using a Complex Absorbing Potential

    14 Mar 2008 | Online Presentations | Contributor(s): Robin Santra

    The Siegert (or Gamow) wave function associated with a resonance state is exponentially divergent at large distances from the scattering target. A complex absorbing potential (CAP) provides a...

    http://nanohub.org/resources/4143

  2. Chemistry of Transition Metal Alloy Nanoparticles with Desired Phase Properties

    20 Jun 2011 | Online Presentations | Contributor(s): Lichang Wang

    In this presentation, I will discuss the results of two alloy nanoparticles, PtAu and PtVFe. I will also present the synergetic results of unraveling PtVFe nanoparticles by coupling computational...

    http://nanohub.org/resources/11434

  3. Computational Mathematics: Role, Impact, Challenges

    20 Dec 2007 | Online Presentations | Contributor(s): Juan C. Meza

    This presentation was one of 13 presentations in the one-day forum, "Excellence in Computer Simulation," which brought together a broad set of experts to reflect on the future of...

    http://nanohub.org/resources/3701

  4. Dynamics of Quantum Fluids: Path integral and Semiclassical Methods

    22 May 2008 | Online Presentations | Contributor(s): Nancy Makri

    The interplay of many-body nonlinear interactions and quantum mechanical effects such as zero-point motion or identical particle exchange symmetries lead to intriguing phenomena in low-temperature...

    http://nanohub.org/resources/4584

  5. Dynamics on the Nanoscale: Time-domain ab initio studies of quantum dots, carbon nanotubes and molecule-semiconductor interfaces

    01 Feb 2008 | Online Presentations | Contributor(s): Oleg Prezhdo

    Device miniaturization requires an understanding of the dynamical response of materials on the nanometer scale. A great deal of experimental and theoretical work has been devoted to characterizing...

    http://nanohub.org/resources/3951

  6. Energy and Nanoscience A More Perfect Union

    29 Mar 2009 | Online Presentations | Contributor(s): Mark A. Ratner

    Huge problems of energy and sustainability confront the science/engineering community, mankind, and our planet. The energy problem comes in many dimensions, including supply, demand, conservation,...

    http://nanohub.org/resources/6554

  7. Exploring Physical and Chemical control of molecular conductance: A computational study

    01 Feb 2008 | Online Presentations | Contributor(s): Barry D. Dunietz

    http://nanohub.org/resources/3945

  8. Finite Size Scaling and Quantum Criticality

    09 May 2007 | Online Presentations | Contributor(s): Sabre Kais

    The study of quantum phase transitions, which are driven by quantum fluctuations as a consequence of Heisenberg's uncertainty principle, continues to be of increasing interest in the fields...

    http://nanohub.org/resources/2663

  9. Ionic Selectivity in Channels: complex biology created by the balance of simple physics

    05 Jun 2008 | Online Presentations | Contributor(s): Bob Eisenberg

    An important class of biological molecules—proteins called ionic channels—conduct ions (like Na+ , K+ , Ca2+ , and Cl− ) through a narrow tunnel of fixed charge (‘doping’). Ionic...

    http://nanohub.org/resources/4726

  10. MCW07 Electronic Level Alignment at Metal-Molecule Contacts with a GW Approach

    05 Sep 2007 | Online Presentations | Contributor(s): Jeffrey B. Neaton

    Most recent theoretical studies of electron transport in single-molecule junctions rely on a Landauer approach, simplified to treat electron-electron interactions at a mean-field level within...

    http://nanohub.org/resources/3094

  11. MCW07 Modeling Charging-based Switching in Molecular Transport Junctions

    05 Sep 2007 | Online Presentations | Contributor(s): Sina Yeganeh, Misha Galperin, Mark A. Ratner

    We will discuss several proposed explanations for the switching and negative differential resistance behavior seen in some molecular junctions. It is shown that a proposed polaron model is...

    http://nanohub.org/resources/3076

  12. Perspectives on Computational Quantum Chemistry

    20 Dec 2007 | Online Presentations | Contributor(s): Martin P. Head-Gordon

    This presentation was one of 13 presentations in the one-day forum, "Excellence in Computer Simulation," which brought together a broad set of experts to reflect on the future of...

    http://nanohub.org/resources/3726

  13. The basics of quantum Monte Carlo

    18 Jun 2007 | Online Presentations | Contributor(s): Lucas Wagner, Jeffrey C Grossman, Jeffrey B. Neaton

    Quantum Monte Carlo is a highly accurate method to approximately solve the Schrodinger equation. I explain quantum Monte Carlo in a way that should be accessible to someone who is somewhat...

    http://nanohub.org/resources/2816