Tags: quantum dots

Description

Quantum dots have a small, countable number of electrons confined in a small space. Their electrons are confined by having a tiny bit of conducting material surrounded on all sides by an insulating material. If the insulator is strong enough, and the conducting volume is small enough, then the confinement will force the electrons to have discrete (quantized) energy levels. These energy levels can influence the device behavior at a macroscopic scale, showing up, for example, as peaks in the conductance. Because of the quantized energy levels, quantum dots have been called "artificial atoms." Neighboring, weakly-coupled quantum dots have been called "artificial molecules."

Learn more about quantum dots from the many resources on this site, listed below. More information on Quantum dots can be found here.

Online Presentations (21-40 of 54)

  1. MCW07 Physics of Contact Induced Current Asymmetry in Transport Through Molecules

    25 Feb 2008 | Online Presentations | Contributor(s): Bhaskaran Muralidharan, Owen D. Miller, Neeti Kapur, Avik Ghosh, Supriyo Datta

    We first outline the qualitatively different physics involved in the charging-induced current asymmetries in molecular conductors operating in the strongly coupled (weakly interacting)...

    https://nanohub.org/resources/3073

  2. Finite Size Scaling and Quantum Criticality

    02 Jan 2008 | Online Presentations | Contributor(s): Sabre Kais

    In statistical mechanics, the finite size scaling method provides a systematic way to extrapolate information about criticality obtained from a finite system to the thermodynamic limit. For...

    https://nanohub.org/resources/3526

  3. NanoElectronic MOdeling: NEMO

    20 Dec 2007 | Online Presentations | Contributor(s): Gerhard Klimeck

    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 computational...

    https://nanohub.org/resources/3707

  4. Engineering Nanomedical Systems

    16 Nov 2007 | Online Presentations | Contributor(s): James Leary

    This tutorial will cover general problems and approaches to the design of engineered nanomedical systems. An example to be covered is the engineering design of programmable multilayered...

    https://nanohub.org/resources/3539

  5. Engineering at the nanometer scale: Is it a new material or a new device?

    06 Nov 2007 | Online Presentations | Contributor(s): Gerhard Klimeck

    This seminar will overview NEMO 3D simulation capabilities and its deployment on the nanoHUB as well as an overview of the nanoHUB impact on the community.

    https://nanohub.org/resources/3504

  6. KIST/PU Multi-Component, Multi-Functional Nanomedical Systems for Drug/Gene Delivery

    23 Oct 2007 | Online Presentations | Contributor(s): James Leary

    In this brief paper we describe some of our recent efforts to construct multi-component, multi-functional nanomedical systems for delivery of therapeutic genes. We first describe the general...

    https://nanohub.org/resources/3380

  7. MCW07 Simple Models for Molecular Transport Junctions

    13 Sep 2007 | Online Presentations | Contributor(s): Misha Galperin, Abraham Nitzan, Mark A. 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.

    https://nanohub.org/resources/3072

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

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

    The integration of thin (< 100 nm) metal films with micro-scale optical waveguides provides a route to controlled spatial excitation of cellular fluorescence within a biochip...

    https://nanohub.org/resources/3121

  9. What Can the TEM Tell You About Your Nanomaterial?

    26 Feb 2007 | Online Presentations | Contributor(s): Eric Stach

    In this tutorial, I will present a brief overview of the ways that transmission electron microscopy can be used to characterize nanoscale materials. This tutorial will emphasize what TEM does...

    https://nanohub.org/resources/2359

  10. Atomistic Alloy Disorder in Nanostructures

    26 Feb 2007 | Online Presentations | Contributor(s): Gerhard Klimeck

    Electronic structure and quantum transport simulations are typically performed in perfectly ordered semiconductor structures. Bands and modes are defined resulting in quantized conduction and...

    https://nanohub.org/resources/2350

  11. Surprises on the nanoscale: Plasmonic waves that travel backward and spin birefringence without magnetic fields

    08 Jan 2007 | Online Presentations | Contributor(s): Daniel Neuhauser

    As nanonphotonics and nanoelectronics are pushed down towards the molecular scale, interesting effects emerge. We discuss how birefringence (different propagation of two polarizations) is...

    https://nanohub.org/resources/2256

  12. Nanoparticles in Biology and Materials: Engineering the Interface through Synthesis

    29 Jan 2007 | Online Presentations | Contributor(s): Vincent Rotello

    Monolayer-protected nanoparticles provide versatile tools for nanotechnology. In our research, we use these nanoparticles as building blocks for the creation of functional magnetic and...

    https://nanohub.org/resources/2312

  13. Nanotechnology and Occupational Safety and Health: What are the Issues, What do we know, and What is NIOSH Doing

    21 Nov 2006 | Online Presentations | Contributor(s): Chuck L Geraci

    Nanotechnology and Occupational Safety and Health: What are the Issues, What do we know, and What is NIOSH Doing

    https://nanohub.org/resources/2008

  14. NEMO 3D: Intel optimizations and Multiple Quantum Dot Simulations

    03 Aug 2006 | Online Presentations | Contributor(s): Anish Dhanekula, Gerhard Klimeck

    NEMO-3D is a nanoelectronic modeling tool that analyzes the electronic structure of nanoscopic devices. Nanoelectronic devices such as Quantum Dots (QDs) can contain millions of atoms,. Therefore,...

    https://nanohub.org/resources/1673

  15. Nanotubes and Nanowires: One-dimensional Materials

    17 Jul 2006 | Online Presentations | Contributor(s): Timothy D. Sands

    What is a nanowire? What is a nanotube? Why are they interesting and what are their potential applications? How are they made? This presentation is intended to begin to answer these questions...

    https://nanohub.org/resources/1639

  16. Engineering Nanomedical Systems

    06 Mar 2006 | Online Presentations | Contributor(s): James Leary

    This tutorial discusses general problems and approaches to the design of engineered nanomedical systems. One example given is the engineering design of programmable multilayered nanoparticles...

    https://nanohub.org/resources/1093

  17. Molecular Transport Structures: Elastic Scattering, Vibronic Effects and Beyond

    13 Feb 2006 | Online Presentations | Contributor(s): Mark A. Ratner, Abraham Nitzan, Misha Galperin

    Current experimental efforts are clarifying quite beautifully the nature of charge transport in so-called molecular junctions, in which a single molecule provides the channel for current flow...

    https://nanohub.org/resources/1018

  18. A Gentle Introduction to Nanotechnology and Nanoscience

    13 Feb 2006 | Online Presentations | Contributor(s): Mark A. Ratner

    While the Greek root nano just means dwarf, the nanoscale has become a giant focus of contemporary science and technology. We will examine the fundamental issues underlying the excitement...

    https://nanohub.org/resources/1021

  19. Active Photonic Nanomaterials: From Random to Periodic Structures

    06 Feb 2006 | Online Presentations | Contributor(s): Hui Cao

    Active photonic nanomaterials, which have high gain or large nonlinearity, are essential to the development of nanophotonic devices and circuits. In this talk, I will provide a review of our...

    https://nanohub.org/resources/1012

  20. Designing Nanocomposite Materials for Solid-State Energy Conversion

    10 Nov 2005 | Online Presentations | Contributor(s): Timothy D. Sands

    New materials will be necessary to break through today's performance envelopes for solid-state energy conversion devices ranging from LED-based solid-state white lamps to thermoelectric...

    https://nanohub.org/resources/832