Tags: research seminar

Resources (141-160 of 326)

  1. Chamaeleo: Toward Self-Managing Service-Oriented Applications

    17 Sep 2007 | | Contributor(s):: Brahim Medjahed

    Service-oriented computing is slated to shape modern societies in vital areas such as healthcare, government, science, business, and finance. It utilizes services as the building blocks for developing collaborative applications, known as service-oriented applications (SOAs), distributed within...

  2. Introduction of MEMS Activity at Nano/Micro System Engineering Lab., Kyoto University

    15 Sep 2007 | | Contributor(s):: OSAMU TABATA

    We are aiming at the realization of microsystems and nanosystems with novel and unique functions by integrating functional elements in different domains such as mechanics, electronics, chemistry, optics and biotechnology. These micro/nano systems are expected to be novel machines, which will...

  3. MCW07 Simple Models for Molecular Transport Junctions

    13 Sep 2007 | | Contributor(s):: , Abraham Nitzan, Mark Ratner

    We review our recent research on role of interactions in molecular transport junctions. We consider simple models within nonequilibrium Green function approach (NEGF) in steady-state regime.

  4. MCW07 Conductance Switching in Fluorene/TiO2 Molecular Heterojunctions

    13 Sep 2007 | | Contributor(s):: Richard L.McCreery

    Molecular junctions consisting of a monolayer of fluorene and 10 nm of TiO2 between conducting contacts exhibit a memory effect upon positive polarization of the of the TiO2 for a few milliseconds. The junction conductance increases for a period of several minutes, but can be “erased” by a...

  5. MCW07 Molecular Electronics and the Bottom-up View of Electronic Conduction

    12 Sep 2007 | | Contributor(s):: Supriyo Datta

    Molecular electronics is commonly associated with the bottom-up approach to nanofabrication. My objective in this talk is to point out how it also leads to a bottom-up view of electronic conduction completely different from the standard top-down approach that starts from large conductors and...

  6. MCW07 Silicon Based Nanopore Sensors for Detection of DNA Molecules

    11 Sep 2007 | | Contributor(s):: Samir Iqbal, Demir Akin, Rashid Bashir

    Solid-state nanopores have emerged as possible candidates for next-generation DNA sequencing devices. In this talk, we will review our recent work in development of solid-state nanopore channels that are selective towards single strand DNA (ssDNA). Nanopores functionalized with a 'probe' of...

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

    05 Sep 2007 | | 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 density functional theory (DFT). While this framework has proven relatively accurate for certain...

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

    23 Aug 2007 | | Contributor(s):: Sina Yeganeh, , Mark 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 successful in predicting both hysteresis and NDR behavior, and the model is elaborated with image charge...

  9. Micro-scaled Biochips with Optically Active Surfaces for Near and Far-field Analysis of Cellular Fluorescence

    31 Aug 2007 | | Contributor(s):: Huw Summers

    The integration of thin (< 100 nm) metal films with micro-scaleoptical waveguides provides a route to controlled spatialexcitation of cellular fluorescence within a biochip platform.Surface bound electron-plasma oscillations (surface plasmon waves)interact with photons to produce an...

  10. HCIS-15 Lecture: Nanodevices and Maxwell’s Demon

    23 Jul 2007 | | Contributor(s):: Supriyo Datta

    The 15th International Conference onNonequilibrium Carrier Dynamics in Semiconductors (HCIS-15) lecture.This 30 minute lecture coversroughly the same material as Lecture 1 of Concepts of Quantum Transport.

  11. SPMW A fresh look to amplitude-modulation AFM: Force minimization, interaction measurement, and the quest for high resolution

    05 Jan 2007 | | Contributor(s):: Udo D. Schwarz

    Frequency modulation atomic force microscopy (FM-AFM) has been able to deliver high-resolution atomic-scale images in ultrahigh vacuum for over one decade. In addition, there have been recent reports where atomic resolution has been achieved in air and liquids using FM-AFM [1]. Achieving...

  12. Amine Linked Single Molecule Circuits: Systematic Measurements & Understanding

    02 Jul 2007 | | Contributor(s):: Mark S Hybertsen

    Formation and function of well-defined linkages between organic molecules and metallic electrodes has been a key issue in the field of molecular electronics. We recently discovered that the conductance of single molecule junctions formed using gold-amine linkages can be measured reliably and...

  13. Some Remarks to Electrodynamics of Materials with Negative Refraction

    26 Jun 2007 | | Contributor(s):: Victor G. Veselago

    The negative refraction coefficient n < 0 can be introduced for isotropic materials with anti-parallel directions of phase and group velocities. If some of material can be described by negative n it will have also negative values of both (electrical ε and magnetic μ) permeabilities. In materials...

  14. Victor Veselago Interview on Nanotechnology and Photonics

    26 Jun 2007 | | Contributor(s):: Victor G. Veselago, Phillip Fiorini

    Nanotechnology and photonics interview with Phillip Fiorini.

  15. Selective Silicon Epitaxy Seen at the Nanometer Scale

    14 Jun 2007 | | Contributor(s):: Matthew Mark Sztelle

    The presenter introduces NEMS (nanoelectromechanical systems) and STM (Scanning Tunneling Microscopy and continues to present material on Selective Silicon Epitaxy seen at the Nanometer ScaleMatthew M. Sztelle is a Research Assistant in the Scanning Tunneling Microscopy Group at the Beckman...

  16. Piezoelectric Transducers: Strain Sensing and Energy Harvesting (and Frequency Tuning)

    15 Jun 2007 | | Contributor(s):: Toshikazu Nishida

    Acoustic pressure or mechanical force sensing via piezoelectric coupling is closely related to the harvesting of electrical energy from acoustical and mechanical energy sources. In this talk, mesoscale and microscale piezoelectric transducers for acoustic and vibrational sensing and energy...

  17. Dripping, Jetting, Drops and Wetting: the Magic of Microfluidics

    13 Jun 2007 | | Contributor(s):: David A. Weitz

    This talk will discuss some of the new opportunities That arises by precisely controlling fluid flow and mixing using microfluidicdevices. I describe studies to elucidate mechanisms of drop formation and use these to create new fluid structures that are difficult to achieve with my other method....

  18. On the Cross Roads of Biology and Nanotechnology – Selective DNA Nanopore Sensors

    21 Mar 2007 | | Contributor(s):: Samir Iqbal

    The ability to manipulate and identify the properties of singlebiological molecules with the potential of characterizing biologicalprocesses at the most fundamental levels can significantly facilitaterapid diagnostics and therapeutics. Fabrication of solid-statedevices investigating bacteria,...

  19. Charge Transfer Across an Energy Transducing Integral Membrane Protein Complex

    31 May 2007 | | Contributor(s):: William A. Cramer

    The cytochrome bc complexes of the mitochondrial respiratory and photosynthetic electron transport chains are hetero-oligomeric integral membrane proteins. These proteins are responsible for most of the energy transduction and transport activities across biological membranes. Such complexes...

  20. SPMW AFM at Video Rate and Beyond

    16 May 2007 | | Contributor(s):: Mervyn Miles

    The particular advantages that atomic force microscopy (AFM) has over other types of microscopy are well-known, but it has the one major disadvantage of low imaging rates in conventional instruments in which each image requires typically a minute or more to collect. This has two major...