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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.

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  1. Coulomb Blockade Simulation

    Tools | 05 Jul 2006 | Contributor(s):: Xufeng Wang, Bhaskaran Muralidharan, Gerhard Klimeck

    Simulate Coulomb Blockade through Many-Body Calculations in a single and double quantum dot system

  2. Introduction to Quantum Dot Lab

    4.5 out of 5 stars 

    Online Presentations | 31 Mar 2008 | Contributor(s):: Sunhee Lee, Hoon Ryu, Gerhard Klimeck

    The nanoHUB tool "Quantum Dot Lab" allows users to compute the quantum mechanical "particle in a box" problem for a variety of different confinement shapes, such as boxes, ellipsoids, disks, and pyramids. Users can explore, interactively, the energy spectrum and orbital...

  3. Quantum Dot Spectra, Absorption, and State Symmetry: an Exercise

    0.0 out of 5 stars 

    Teaching Materials | 30 Mar 2008 | Contributor(s):: Gerhard Klimeck

    The tutorial questions based on the Quantum Dot Lab v1.0 available online at Quantum Dot Lab. Students are asked to explore the various different quantum dot shapes, optimize the intra-band absorption through geometry variations, and consider the concepts of state symmetry and eigenstates.

  4. Nanoelectronic Modeling: Multimillion Atom Simulations, Transport, and HPC Scaling to 23,000 Processors

    5.0 out of 5 stars 

    Online Presentations | 07 Mar 2008 | Contributor(s):: Gerhard Klimeck

    Future field effect transistors will be on the same length scales as “esoteric” devices such as quantum dots, nanowires, ultra-scaled quantum wells, and resonant tunneling diodes. In those structures the behavior of carriers and their interaction with their environment need to be fundamentally...

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

    0.0 out of 5 stars 

    Online Presentations | 25 Feb 2008 | Contributor(s):: Bhaskaran Muralidharan, owen 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) self-consistent field (SCF) and the weakly coupled (strongly interacting) Coulomb Blockade (CB) regimes. The CB...

  6. Path Integral Monte Carlo

    0.0 out of 5 stars 

    Tools | 13 Dec 2007 | Contributor(s):: John Shumway, Matthew Gilbert

    Tool Description

  7. Development of a Nanoelectronic 3-D (NEMO 3-D ) Simulator for Multimillion Atom Simulations and Its Application to Alloyed Quantum Dots

    0.0 out of 5 stars 

    Papers | 14 Jan 2008 | Contributor(s):: Gerhard Klimeck, Timothy Boykin

    Material layers with a thickness of a few nanometers are common-place in today’s semiconductordevices. Before long, device fabrication methods will reach a point at which the other two devicedimensions are scaled down to few tens of nanometers. The total atom count in such deca-nanodevices is...

  8. Finite Size Scaling and Quantum Criticality

    0.0 out of 5 stars 

    Online Presentations | 02 Jan 2008 | 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 quantum systems, the finite size corresponds not to the spatial dimension but to the number of elements in...

  9. NanoElectronic MOdeling: NEMO

    0.0 out of 5 stars 

    Online Presentations | 20 Dec 2007 | 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 science and engineering.Novel nanoelectronic devices such as quantum dots, nanowires, and ultra-scaled...

  10. Engineering Nanomedical Systems

    5.0 out of 5 stars 

    Online Presentations | 16 Nov 2007 | 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 nanoparticles (PMNP) to control a multi-sequence process of targeting to rare cells in-vivo, re-targeting to...

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

    0.0 out of 5 stars 

    Online Presentations | 06 Nov 2007 | 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.

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

    0.0 out of 5 stars 

    Online Presentations | 23 Oct 2007 | 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 philosophy of our approach. Then we describe three specific aspects of the overall construction in simple...

  13. MCW07 Simple Models for Molecular Transport Junctions

    0.0 out of 5 stars 

    Online Presentations | 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.

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

    0.0 out of 5 stars 

    Online Presentations | 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...

  15. Quantum Dot Lab Learning Module: An Introduction

    5.0 out of 5 stars 

    Online Presentations | 02 Jul 2007 | Contributor(s):: James K Fodor, Jing Guo

    THIS MATERIAL CORRESPONDS TO AN OLDER VERSION OF QUANTUM DOT LAB THAN CURRENTLY AVAILABLE ON nanoHUB.org.

  16. Quantum dots

    Q&A|Open | Responses: 1

    What I want to do is building an aluminum quantum dot coupled to aluminum leads to observe Coulomb Blockade. To form the tunnel barriers we oxidize the Al in a plasma without any detailed...

    https://nanohub.org/answers/question/2

  17. Quantum Dot - synthesis routes

    0.0 out of 5 stars 

    Downloads | 03 Apr 2007 | Contributor(s):: Saurabh Madaan

    A brief survey of synthesis routes of quantum dots, with more emphasis on epitaxial and colloidal approaches.

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

    0.0 out of 5 stars 

    Online Presentations | 26 Feb 2007 | 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 well, as well where difficulties arise. In particular, I will discuss in an overview manner how...

  19. Atomistic Alloy Disorder in Nanostructures

    4.5 out of 5 stars 

    Online Presentations | 26 Feb 2007 | 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 discrete states. But what if the material is fundamentally disordered? What if the disorder is at the...

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

    5.0 out of 5 stars 

    Online Presentations | 08 Jan 2007 | 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 manifested and could be useful in the future for two systems: coherent plasmonic transport of near-field...