Tags: research seminar

Online Presentations (241-260 of 309)

  1. Organic Electronics Part II: Electric Field Modulation

    28 Jul 2005 | | Contributor(s)::

    A solid state platform has been designed and fabricated that allows characterization of candidate organic semiconductor materials used in organic field-effect transistors (OFET). A systematic experimental protocol has been outlined that allows the separation of contribution of contact resistance...

  2. Synthetic and Processing Strategies to New Molecular and Polymeric...

    28 Jul 2005 | | Contributor(s):: ,

    Recent achievements in the design and synthesis of new arene/heteroaromatic oligomers/molecules functionalized with a variety of phenacyl, alkylcarbonyl, and perfluoroalkylcarbonyl will be presented. These organic semiconductors exhibit low-lying LUMOs allowing efficient electron...

  3. Novel Magnetic Materials for Biomolecular Diagnostics

    28 Jul 2005 | | Contributor(s):: Gil Lee, David Janes, Sugata Bhattacharya, Kyung Jae Jeong, ,

    Paramagnetic particles have emerged as important tools for cell sorting,protein separation, and single molecule measurements. The particles used inthese applications must meet the following requirements: uniform in size,highly paramagnetic, stable in physiological salt buffer, functionizable,and...

  4. Probing Silicon-Based Molecular Electronics with Scanning Tunneling Microscopy

    29 Jul 2005 | | Contributor(s)::

    In recent years, substantial progress has occurred in the field of molecular electronics [1]. In this paper, charge transport through molecule-semiconductor junctions is probed with ultra-high vacuum (UHV) scanning tunneling microscopy (STM). The presence of the semiconductor band gap enables...

  5. Electrical Conduction through dsDNA-Molecule with Nanoscale Break Junctions

    28 Jul 2005 | | Contributor(s):: Ajit Kumar Mahapatro, Kyung Jae Jeong, Sugata Bhattacharya, Gil Lee, David Janes

    Measuring the electrical conductivity through a specific strand of DNA is of great interest to the nano-science and engineering community. This work focuses on the electrical conduction through 15 base-pair, double helix oligo-nucleotides with various sequences. The current-voltage...

  6. Basic Electronic Properties of DNA

    28 Jul 2005 | | Contributor(s):: M. P. Anantram

  7. Measurement of Single Molecule Conductance using STM-Based Break Junctions

    28 Jul 2005 | | Contributor(s)::

    We have measured single molecule conductance using a combined STM- and conducting AFM-based break junction method. The method works in aqueous solutions, which is suitable for biologically relevant molecules such as DNA and peptides, and also allows us to control electron transport through redox...

  8. DNA Charge Motion: Regimes and Behaviors

    28 Jul 2005 | | Contributor(s):: Mark Ratner

    Because DNA is a quasi-one-dimensional species, and because each base is a pi-type chromphore, it was long ago suggested that DNA could conduct electricity. This has become a widely investigated area, and remains of interest for fundamental science and for applications. We will discuss a very...

  9. Tuning of Electronic Properties of Organic Semiconductors...

    27 Jul 2005 | | Contributor(s)::

    Intrinsic conducting polymers are key components in organic electronic devices. These materials are also known to be sensitive toward a variety of gases and vapors, which can be exploited by incorporation as chemical sensitive element in a nanoscale sensing system. The molecular interaction...

  10. Organic Electronics Part I: Chemical Modulation

    27 Jul 2005 | | Contributor(s)::

    Organic semiconductors (OS) have been in the center of attention in at least two areas: in chemical ,sensors and in molecular electronics. Although the chemistry and physics governing them is the same their performance characteristics are apparently measured on different scales. Electrochemical...

  11. Nanofactories - In - Situ Production of Therapeutic Genes...

    27 Jul 2005 | | Contributor(s):: James Leary

  12. A New Terahertz Heterodyne Detector Based on Single-Walled Carbon Nanotubes

    27 Jul 2005 | | Contributor(s)::

    We present non-invasive methods for improving the sensitivity of label-free biosensors that offer the advantage of rapid and real-time detection but suffer from relatively low sensitivity. We present detection of cancer markers using the Quartz Crystal Microbalance and demonstrate that 2...

  13. Sensitivity Amplification in Biosensors using Nanoparticles and Enzymatic Macromolecules

    27 Jul 2005 | | Contributor(s):: Cagri Savran

    We present non-invasive methods for improving the sensitivity of label-free biosensors that offer the advantage of rapid and real-time detection but suffer from relatively low sensitivity. We present detection of cancer markers using the Quartz Crystal Microbalance and demonstrate that 2...

  14. Fine Tuning Microcantilever Vibrations for Ultrasensitive Analyte Mass Detection

    27 Jul 2005 | | Contributor(s):: Arvind Raman

    Microcantilever based biochemical sensing has shown tremendous promise for ultrasenstive detection in both liquid and ambient conditions. However improving the sensitivity, reliability and robustness of these sensors so they can achieve their potential needs substantial efforts in (a) chemical...

  15. A Novel Diagnostic Assay Based On Nanomechanics

    28 Jul 2005 | | Contributor(s)::

    Micro-fabricated silicon cantilevers arrays offer a novel label-free approach where ligand-receptor binding interactions occurring on the sensor generate nanomechanical signals like bending or a change in mass that is optically detected in-situ. We report the detection of multiple unlabelled...

  16. Scientific Software Development

    29 Jun 2005 | | Contributor(s):: Clemens Heitzinger

    The development of efficient scientific simulation codes poses a wide range of problems. How can we reduce the time spent in developing and debugging codes while still arriving at efficient programs? What happens when our codes must interact with existing tools? In recent years, higher-level...

  17. NCN Cyberinfrastructure Overview

    21 Jun 2005 | | Contributor(s):: Gerhard Klimeck

    Presentation of the NCN cyberinfrastructure to the June 2005 NSF review team. The nanoHUB development over 12 months will be presented in a broad overview.

  18. HPC and Visualization for multimillion atom simulations

    21 Jun 2005 | | Contributor(s):: Gerhard Klimeck

    This presentation gives an overview of the HPC and visulaization efforts involving multi-million atom simulations for the June 2005 NSF site visit to the Network for Computational Nanotechnology.

  19. Nanoelectronics: The New Frontier?

    18 Apr 2005 | | Contributor(s):: Mark Lundstrom

    After forty years of advances in integrated circuit technology, microelectronics is undergoing a transformation to nanoelectronics. Modern day MOSFETs now have channel lengths of only 50 nm, and billion transistor logic chips have arrived. Moore’s Law continues, but the end of MOSFET scaling is...

  20. NCN Overview

    06 Apr 2005 | | Contributor(s):: Mark Lundstrom

    This presentation is an overview of the Network for Computational Nanotechnology (NCN) presented at the first NCN Student Conference in April 2005. It is intended to give students an understanding of the NCN's vision and mission.