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Birck Nanotechnology Seminar Series

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

    21 Mar 2007 | Online Presentations | 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,...

  2. Computer Simulation of Nanoparticles, Viruses, and Electrical Power-Generating Bacteria

    20 Mar 2007 | Online Presentations | Contributor(s): Peter J. Ortoleva

    Models of cells and nanometer-scale biosystems are presented that clarify their physico-chemical characteristics and allow for computer- aided design of therapeutic and nanotechnical devices. Multiscale techniques are used to obtain rigorous, coarse-grained equations for the migration and...

  3. Dendrimer-Templated Catalyst for Controlled Growth of Single-Wall Carbon Nanotubes by Plasma-Enhanced CVD

    20 Feb 2007 | Online Presentations | Contributor(s): Placidus Amama

    Carbon nanotubes (CNTs) are an important class of materials with several technological applications because they possess unparalleled properties in terms of ballistic electrical conductivity, thermal conductivity, tensile strength, and sensitivity to chemical and biological agents. To exploit...

  4. Electron Emission from Nanoscale Carbon Materials

    15 May 2007 | Online Presentations | Contributor(s): Timothy S Fisher

    Prior studies on electron emission show possibly beneficial effects ofnanoscale phenomena on energy-conversion characteristics. For example,recent work has shown that the electric field around a nanoscale fieldemission device can increase the average energy of emitted electrons. Weconsider here...

  5. Introduction to X-ray Photoelectron Spectroscopy and XPS Application for Biologically Related Objects

    14 Feb 2007 | Online Presentations | Contributor(s): Dmitry Zemlyanov

    X-ray Photoelectron Spectroscopy (XPS), which is known as Electron Spectroscopy for Chemical Analysis (ESCA), is a powerful research tool for the study of the surface of solids. The technique becomes widely used for studies of the properties of atoms, molecules, solids, and surfaces. The main...

  6. "Ab Initio" Theory of Novel Micro and Nanolasers

    19 May 2008 | Online Presentations | Contributor(s): A. Douglas Stone

    While the laser is one of the most important inventions of the past century and one of the most interesting and controllable non-linear systems in physics, there is surprisingly little predictive theory of lasing properties. Predicting lasing thresholds and output power far above threshold in...

  7. Plasmonic Metamaterials: Unusual Optics and Applications

    28 Feb 2008 | Online Presentations | Contributor(s): Igor Smolyaninov

    Surface plasmon-polaritons (or plasmons) are collective excitations of the conduction electrons and the electromagnetic field on the surface of such good metals as gold and silver. Near the frequency of surface plasmon resonance plasmons may perceive regular dielectrics as negative index...

  8. Hexagonal Prism Blue Diode Laser Using Whispering Gallery Mode (WGM) Resonances

    23 Oct 2007 | Online Presentations | Contributor(s): Sangho Kim

    Semiconductor lasers have many important applications, including communication technologies, optical storage, printing, and molecular detection. The range of applications could be broadened significantly if the lasers could be made smaller and with lower threshold currents. Today’s in-plane...

  9. Highly Efficient Thermal Transport: The Application of Carbon Nanotube Array Interfaces

    01 Feb 2007 | Online Presentations | Contributor(s): Baratunde A. Cola

    Carbon nanotubes (CNTs) have received much attention in recent years for their extraordinary properties that through careful engineering may be leverage for the development of numerous advantageous applications. However, to date, only few CNT based applications exist in the market place. So when...

  10. Linear and Nonlinear Optical Devices Based on Slow Light Propagation: Figures of Merit

    19 May 2008 | Online Presentations | Contributor(s): Jacob B. Khurgin

    Performance of optical delay lines and nonlinear devices based on slow wave propagation in photonic crystal waveguides in the presence of higher order dispersion is analyzed and compared with other slow light schemes, such as coupled resonators, media with electromagnetically-induced...

  11. Ripples and Warping of Graphene: A Theoretical Study

    08 Jun 2010 | Online Presentations | Contributor(s): Umesh V. Waghmare

    We use first-principles density functional theory based analysis to understand formation of ripples in graphene and related 2-D materials. For an infinite graphene, we show that ripples are linked with a low energy branch of phonons that exhibits quadratic dispersion at long wave-lengths. Many...

  12. Silicon Spintronics

    04 Jun 2008 | Online Presentations | Contributor(s): Ian Appelbaum

    "Electronics" uses our ability to control electrons with electric fields via interaction with their fundamental charge. Because we can manipulate the electric fields within semiconductors, they are the basis for microelectronics, and silicon (Si) is the most widely-used semiconductor for...

  13. X-ray Diffraction and Reflectivity Analysis of Thin Films and Nanomaterials

    29 Dec 2009 | Online Presentations | Contributor(s): Mauro Sardela

    A review of x-ray analysis techniques applied to the characterization of nanomaterials will be presented with focus on x-ray lab source instrumentation similar to the facilities available at the Birck Nanotechnology Center. Practical aspects of data acquisition and interpretation using x-ray...

  14. Transmission of images with subwavelength resolution to distances of several wavelengths in microwave, terahertz and infrared ranges

    08 Apr 2008 | Online Presentations | Contributor(s): Pavel Belov

    The resolution of conventional imaging systems is restricted by thediffraction limit: the details smaller than half-wavelength of radiationcannot be resolved. Using novel engineered media with extreme opticalanisotropy and their waveguiding properties it is possible to overcomethe classical...

  15. Understanding Deformation Processes in Nanocrystalline Metals Through the Use of Real-time Electron Microscopy Techniques

    03 May 2007 | Online Presentations | Contributor(s): Eric Stach

    It is has long been known that the grain size of a material has a substantial effect on its mechanical strength, through the well-established Hall-Petch relationship. In the past decade or so, there has been a resurgence of interest in this topic resulting from the ability to create metals with...

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

    15 Sep 2007 | Online Presentations | 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...

  17. Nanotechnology: Considerations for Facility Design

    21 May 2007 | Online Presentations | Contributor(s): John Weaver

    The growing area of study broadly termed nanotechnology provides a new set of challenges to the facility designer. While evolutionary changes in the quality of clean spaces occur, it is the collaborative nature of this field that requires revolutionary changes in facility design. The main...

  18. Surface Characterization Studies of Carbon Materials: SS-DNA, SWCNT, Graphene, HOPG

    16 Feb 2010 | Online Presentations | Contributor(s): Dmitry Zemlyanov

    In this presentation examples of surface characterization studies of carbon specimens will be presented. (1) In particularly, the systematic XPS (X-ray photoelectron spectroscopy) characterization of graphene grown on the SiC surface will be reported. This work demonstrates a use for XPS to...

  19. 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 of condensed matter and atomic and molecular physics. In this field we have established an analogy between...

  20. Electric and Magnetic Properties of Multiferroic Oxide Thin Films and Heterostructures

    20 Oct 2010 | Online Presentations | Contributor(s): Pedro Antonio Prieto

    Outline:

    • Introduction
    • Preparation methods for oxide thin films
    • Oxide thin films and heterostructures
    • Multiferroic materials
    • BiFeO3, YMnO3, BiMnO3 thin films and FE/FM...

    • Nanotechnology Activities in Colombia: A Perspective From the Excellence Center for Novel Materials

      11 Oct 2010 | Online Presentations | Contributor(s): Pedro Antonio Prieto

      I will present the current state of R & D in the fields of condensed matter, novel materials, and nanotechnology in Colombia. I will initially consider Latin America and the Caribbean (LAC) to then visualize individual developments, as well as those for the region as a whole in these fields of...

    • Transformative Power Semiconductor Technologies to Impact 21st Century Energy Economy, and Space and Defense Electronics

      22 Sep 2010 | Online Presentations | Contributor(s): Krishna Shenai

      This talk will focus on advanced power semiconductor materials, devices, circuits and systems that are needed in order to address this daunting challenge. Specifically we will discuss emerging silicon and wide bandgap materials and power devices, heterogeneous chip-scale power integration,...

    • TiCN/TiNbCN Multilayer System with Enhanced Tribological Properties

      20 Oct 2010 | Online Presentations | Contributor(s): Pedro Antonio Prieto

      Improvement in the mechanical properties of hard coatings such monolayer (TiN, CrN, AlCN, WC-Co, TiCN) [1], has been achieved using compositional gradient WC/C layer, or multilayered type [transition metal/transition carbide]n, [transition metal/transition nitride]n, [TiCN/ZrCN]n, among...

    • Control of Spin Precession in a Datta-Das Transistor Structure

      11 Apr 2011 | Online Presentations | Contributor(s): Hyun Cheol Koo

      Transistors Switch onto Spin

      spin fet transistor
      Using the spin of an electron in addition to, or instead of, the charge properties is believed to have many benefits in terms of speed, power-cost, and integration density over conventional electronic circuits. At the heart of the...

    • The Elusive Spin Transistor

      11 Apr 2011 | Online Presentations | Contributor(s): Supriyo Datta

      This presentation is a short introductory tutorial on spin-transistors.

    • Disordered Photonics

      11 Apr 2014 | Online Presentations | Contributor(s): Hui Cao

      Most of the research in the field of photonics has focused on understanding and mitigating the effects of disorder which are often detrimental. For certain applications, however, intentionally introducing disorder can actually improve the device performance, e.g., in photovoltaics optical...

    • Optical Multi-Dimensional Coherent Spectroscopy of Semiconductor Nanostructures

      08 Apr 2014 | Online Presentations | Contributor(s): Steven Cundiff

      I will give an introduction to optical two-dimensional coherent spectroscopy and then present our use of it to study optical resonances in semiconductor nanostructures. In quantum wells, our results show that many-body effects dominate the light-matter interaction for excitons in semiconductors...

    • Engineered Defects in Wide Band-gap Semiconductors for Single-spin Sensing and Computation

      26 Mar 2014 | Online Presentations | Contributor(s): Abram Falk

      Using infrared light at near-telecom wavelengths, I will show that spin states in silicon carbide exhibit long quantum coherence times that persist up to room temperature. I will also discuss new strategies for generating coherent spin interactions at the nanoscale using defects in inequivalent...

    • Active Nanophotonics: From Coherent Control of Quantum Emitters to Plasmonic Nanolasers

      28 Apr 2014 | Online Presentations | Contributor(s): Ken Shih

      Light-matter interaction at nanometer scale is emerging as one of the most exciting fields in nanoscience. In combination with the advanced materials synthesis technique to tailor novel low-dimensional electronic systems, new doors are open toward design and realization of nanophotonic devices...

    • Coherent Nonlinear Optics, Backward Waves and Negative Spatial Dispersion

      16 May 2014 | Online Presentations | Contributor(s): Alexander K. Popov

      Extraordinary frequency-converting nonlinear-optical propagation processes associated with backward electromagnetic and elastic waves are described. Particular realizations of negative spatial dispersion which enable such waves are investigated.

    • Ongoing Transformation of Computational Nanophotonics

      18 May 2014 | Online Presentations | Contributor(s): Alexander V. Kildishev

      Computational nanophotonics is one of the central tools of the science of light and photonic device engineering. It plays a crucial role in enabling optical technologies ranging from bio-sensing to quantum information processing. Up to the present, a plethora of various methods and commercial...

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