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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.
Nanotubes and Nanowires: One-dimensional Materials
5.0 out of 5 stars
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...
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...
Molecular Transport Structures: Elastic Scattering, Vibronic Effects and Beyond
4.5 out of 5 stars
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...
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...
Active Photonic Nanomaterials: From Random to Periodic Structures
0.0 out of 5 stars
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...
Quantum-dot Cellular Automata (QCA) - Memory Cells
03 Feb 2006 | Animations | Contributor(s): John C. Bean
Scientists and engineers are looking for completely different ways of storing and analyzing information. Quantum-dot Cellular Automata are one possible solution. In computers of the future,...
Quantum-dot Cellular Automata (QCA) - Logic Gates
An earlier animation described how "Quantum-dot Cellular Automata" (QCAs) could serve as memory cells and wires. This animation contnues the story by describing how QCAs can be made into MAJORITY,...
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
VolQD: Graphics Hardware Accelerated Interactive Visual Analytics of Multi-million Atom Nanoelectronics Simulations
13 Dec 2005 | Online Presentations | Contributor(s): Wei Qiao
In this work we present a hardware-accelerated direct volume rendering
system for visualizing multivariate wave functions in semiconducting
quantum dot (QD) simulations. The simulation...
Atomic Force Microscopy
4.0 out of 5 stars
01 Dec 2005 | Online Presentations | Contributor(s): Arvind Raman
Atomic Force Microscopy (AFM) is an indispensible tool in nano science for the fabrication, metrology, manipulation, and property characterization of nanostructures. This tutorial reviews some of...
Quantum Dot Lab
12 Nov 2005 | Tools | Contributor(s): Prasad Sarangapani, James Fonseca, Daniel F Mejia, James Charles, Woody Gilbertson, Tarek Ahmed Ameen, Hesameddin Ilatikhameneh, Andrew Roché, Lars Bjaalie, Sebastian Steiger, David Ebert, Matteo Mannino, Hong-Hyun Park, Tillmann Christoph Kubis, Michael Povolotskyi, Michael McLennan, Gerhard Klimeck
Compute the eigenstates of a particle in a box of various shapes including domes, pyramids and multilayer structures.
Designing Nanocomposite Thermoelectric Materials
08 Nov 2005 | Online Presentations | Contributor(s): Timothy D. Sands
This tutorial reviews recent strategies for designing high-ZT nanostructured materials, including superlattices, embedded quantum dots, and nanowire composites. The tutorial highlights the...
Bandstructure in Nanoelectronics
01 Nov 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
This presentation will highlight, for nanoelectronic device examples, how the effective mass approximation breaks down and why the quantum mechanical nature of the atomically resolved material...
Nanoparticle Synthesis and Assembly for Biological Sensing
25 Oct 2005 | Online Presentations | Contributor(s): Gil Lee
Nanoparticles have unique physical and chemical properties that make them very useful for
biological and chemical sensing. For example, colloidal gold has been used as an optical transducer...
Semiconductor Interfaces at the Nanoscale
17 Oct 2005 | Online Presentations | Contributor(s): David Janes
The trend in downscaling of electronic devices and the need to add functionalities such as sensing and nonvolatile memory to existing circuitry dictate that new approaches be developed for device...
Plasmonic Nanophotonics: Coupling Light to Nanostructure via Plasmons
03 Oct 2005 | Online Presentations | Contributor(s): Vladimir M. Shalaev
The photon is the ultimate unit of information because it packages data in a signal of zero mass and has unmatched speed. The power of light is driving the photonicrevolution, and information...
Parallel Computing for Realistic Nanoelectronic Simulations
12 Sep 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
Typical modeling and simulation efforts directed towards the understanding of electron transport at the nanometer scale utilize single workstations as computational engines. Growing understanding...
21 Jul 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
Quantum Dots are man-made artificial atoms that confine electrons to a small space. As such, they have atomic-like behavior and enable the study of quantum mechanical effects on a length scale...
Nanomaterials: Quantum Dots, Nanowires and Nanotubes
15 Jul 2005 | Online Presentations | Contributor(s): Timothy D. Sands
What is a quantum dot? What is a nanowire? What is a nanotube? Why are these interesting and what are their potential applications? How are they made? This presentation is intended to begin to...
HPC and Visualization for multimillion atom simulations
21 Jun 2005 | Online Presentations | 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.