Tags: quantum dots

More tags

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.

Teaching Materials (1-14 of 14)

  1. Cadmium Selenide Synthesis, Characterization and Modeling

    Teaching Materials | 22 Oct 2021 | Contributor(s):: Shelby Hatch, Evan R. Trivedi, Baudilio Tejerina, George C. Schatz

    This is a combined experiment/computational lab in which cadmium selenide quantum dot nanoparticles are synthesized, their spectra are studied, and the results are modeling using the CNDO/INDO semiempirical electronic structure code. Synthesis and Size Dependent Properties of CdSe Quantum...

  2. MODULE 4 - Quantum Mechanics: "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic

    Teaching Materials | 15 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry

    The last and final module in the "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans, studies basic concepts in quantum mechanics such as quantum dots, band gap theory of solids, waves vs. particles, and the photoelectric effect. The activity for this module...

  3. MODULE 1 - Graphene: "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic

    Teaching Materials | 13 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry

    The first module in "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans, explores the material, graphene, how it was discovered, and the unique properties that it has. The activity paired with this lesson plan re-creates the famous "sticky-tape"...

  4. MODULE 2 - Sizes: "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic

    Teaching Materials | 13 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry

    The next installment of Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans delves into the concept of size and how materials and their properties may change at the macro-, micro-, and nanoscale. Activities include viewing images from a microscope to determine...

  5. Quantum Dots: Real-world Particles in a Box

    Teaching Materials | 15 Jan 2020 | Contributor(s):: Joyce Allen, NNCI Nano

    The purpose of this activity is to show that nanosize particles of a given substance often exhibit different properties and behavior than macro or micro size particles of the same material. The property studied in this activity is the absorption and reflection of light which is based on energy...

  6. Turning Fruit Juice into Graphene Quantum Dots

    Teaching Materials | 06 Jan 2020 | Contributor(s):: John Gomm, NNCI Nano

    Graphene, a sub-nanometer thick sheet made of carbon, was isolated just over a decade ago (2004), yet swiftly won the Nobel Prize for Geim and Novoselov in 2010 for its properties of high strength, conductivity, and transparency. Students will replicate the procedure used to isolate graphene...

  7. Synthesis and Characterization of CdSe Qunatum Dots

    Teaching Materials | 11 Jan 2017 | Contributor(s):: Nicholas Blake, NNCI Nano

    In this laboratory, students will study how surfactant-based chemistry can be used to synthesize CdSe quantum dots and study how the size of the quantum dots can be controlled by varying reaction time. The laboratory will  demonstrate how the color of these quantum dots can be connected to...

  8. Quantum Dot Lab: First-Time User Guide

    Teaching Materials | 08 Feb 2011 | Contributor(s):: SungGeun Kim, Lynn Zentner

    This first-time user guide introduces the quantum dot lab tool. It includes an explanation of the input/output interface and the relationship between inputs and outputs of the quantum dot lab.NCN@Purdue[1] Gerhard Klimeck, Introduction to Quantum Dot Lab: https://www.nanohub.org/resources/4194[2]...

  9. Quantum dot - Design a laser

    Teaching Materials | 09 Nov 2010 | Contributor(s):: SungGeun Kim

    This document is a real-life problem for the quantum dot lab tool. Basic knowledge on the operation principle of a quantum dot laser is needed to solve this test. The test requires the tested person to be familar with the quantum dot lab tool.

  10. Test for Quantum Dot Lab tool

    Teaching Materials | 09 Nov 2010 | Contributor(s):: SungGeun Kim, Saumitra Raj Mehrotra

    This test is aimed at self-learning students or instructors who may be engaged in teaching classes related to the quantum dot lab tool.The level of this test should not be difficult for a student who has gone through "the general tutorial to quantum dots,""the introductory tutorial to the quantum...

  11. Nanotechnology Animation Gallery

    Teaching Materials | 22 Apr 2010 | Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck

    Animations and visualization are generated with various nanoHUB.org tools to enable insight into nanotechnology and nanoscience. Click on image for detailed description and larger image download. Additional animations are also...

  12. Illinois ABE 446 Lecture 3: Quantum Dots and Polymers

    Teaching Materials | 11 Feb 2010 | Contributor(s):: Kaustubh Bhalerao

  13. Introduction to Coulomb Blockade Lab

    0.0 out of 5 stars 

    Teaching Materials | 31 Mar 2008 | Contributor(s):: Bhaskaran Muralidharan, Xufeng Wang, Gerhard Klimeck

    The tutorial is based on the Coulomb Blockade Lab available online at Coulomb Blockade Lab. Students are introduced to the concepts of level broadening and charging energies in artificial atoms (single quantum dots) and molecules (coupled quantum dots).A tutorial level introduction to the...

  14. 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.