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Conquering Surface Plasmon Resonance Loss in Metallic Nanostructures
16 Oct 2007 | | Contributor(s):: Mikhail A. Noginov
We have observed the compensation of loss in metal by gain indielectric in the mixture of Ag aggregate and rhodamine 6G dye. Thedemonstrated six-fold enhancement of the Rayleigh scattering is the evidence of the enhancement of the localized surface plasmon (SP) resonance. In the attenuated total...
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Energy-level Alignment of Aryl Thiols Chemisorbed on Metal Surfaces: Implications for Molecular Electronic Junctions
27 Sep 2007 | | Contributor(s):: Roger D. van Zee
Charge-transport through the interface is a key part of the behavior of any electronic junction. One interface property important to molecular-electronic junctions is the energetic mismatch between the conductive levels of the molecule and the Fermi level of the contact material. This seminar...
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Renewable Energy from Synthetic Biology
25 Sep 2007 | | Contributor(s):: Jay D. Keasling
Jay Keasling, Co-Leader of The Helios Project, is the Director of the Physical Biosciences Division at Berkeley Lab, and a groundbreaking researcher in the new scientific field of synthetic biology. He is a UC Berkeley professor of Chemical and Bioengineering, and founder of Amyris...
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Toward Anticipatory Governance
25 Sep 2007 | | Contributor(s):: David Guston
The Center for Nanotechnology in Society at Arizona State University (CNS-ASU) is an NSF-funded center, created in October 2005, for research, education and outreach on the societal aspects of nano-scale science and engineering (NSE). CNS-ASU involves the collaboration of scores of faculty,...
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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...
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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...
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MCW07 Simple Models for Molecular Transport Junctions
13 Sep 2007 | | Contributor(s):: Misha Galperin, 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.
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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...
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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...
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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...
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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 systems,...
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MCW07 Modeling Charging-based Switching in Molecular Transport Junctions
23 Aug 2007 | | Contributor(s):: Sina Yeganeh, Misha Galperin, 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...
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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 evanescent...
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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.
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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...
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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...
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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...
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Victor Veselago Interview on Nanotechnology and Photonics
26 Jun 2007 | | Contributor(s):: Victor G. Veselago, Phillip Fiorini
Nanotechnology and photonics interview with Phillip Fiorini.
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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...
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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...