Tags: diffusion

Resources (21-40 of 41)

  1. Lecture 3: Resistance-Ballistic to Diffusive

    28 Jul 2011 | | Contributor(s):: Mark Lundstrom

    The resistance of a ballistic conductor and concepts, such as the quantumcontact resistance, are introduced and discussed. The results are then generalized to treat transport all the way from the ballistic to diffusive regimes.

  2. Lecture 2: Quantum of Conductance: Resistance and uncertainty

    08 Sep 2010 |

  3. Nanotechnology Animation Gallery

    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 available Featured nanoHUB tools: Band Structure Lab. Carrier...

  4. Diffusion of holes and electrons

    15 Apr 2010 | | Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck

    Diffusion is a process of particles distributing themselves from regions of high- to low- concentrations. In semi-classical electronics these particles are the charge carriers (electrons and holes). The rate at which a carrier can diffuse is called diffusion constant with units of cm2/s. The...

  5. Illinois ECE 440: Diffusion and Energy Band Diagram Homework

    28 Jan 2010 | | Contributor(s):: Mohamed Mohamed

    This homework covers Diffusion of Carriers, Built-in Fields and Metal semiconductor junctions.

  6. Lecture 9: Dynamic Properties

    05 Jan 2010 | | Contributor(s):: Ashlie Martini

    Topics:Time correlation functionsEinstein relationsGreen-Kubo relations

  7. The Virtual Kinetics of Materials Laboratory

    09 Sep 2009 | | Contributor(s):: Alex Bartol, R. Edwin Garcia, David R. Ely, Jon Guyer, Luis Enrique Sotelo Martin

    web interface to develop, modify, and execute FiPy, Gibbs, and other python-based applications

  8. Illinois ECE 440 Solid State Electronic Devices, Lecture 16-17: Diffusion

    20 Oct 2009 | | Contributor(s):: Eric Pop

    So far:•Energy bands, Doping, Fermi levels•Drift (~n*v), diffusion (~dn/dx)•Einstein relationship (D/μ = kT/q)•“Boring” semiconductor resistors (either n- or p-type)•Majority/minority carriers with illuminationToday, our first “useful” device:•The P-N junction diode in equilibrium (external...

  9. Illinois ECE 440 Solid State Electronic Devices, Lecture 14-15: Diffusion with Recombination

    08 Oct 2009 | | Contributor(s):: Eric Pop

    •Diffusion with recombination•The diffusion length (distance until they recombine)

  10. Illinois ECE 440 Solid State Electronic Devices, Lecture 13: Diffusion

    01 Oct 2009 | | Contributor(s):: Eric Pop

    ECE 440: Lecture 13Diffusion Current

  11. Drift Diffusion Lab: First-Time User Guide

    13 Jun 2009 | | Contributor(s):: Saumitra Raj Mehrotra, Benjamin P Haley

    This first-time user guide provides introductory material to Drift Diffusion Lab on nanoHUB. It includes a tour of the Rappture interface, which notes key inputs and typical outputs. It also provides an introduction to concepts of drift and diffusion in a semiconductor. We discuss the default...

  12. ECE 606 Lecture 17: Hall Effect, Diffusion

    24 Feb 2009 | | Contributor(s):: Muhammad A. Alam

    Outline:Measurement of mobilityHall Effect for determining carrier concentrationPhysics of diffusionConclusions

  13. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 6: Diffusion in Solids

    19 Nov 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Diffusion in SolidsISSUES TO ADDRESS... How does diffusion occur? How can the rate of diffusion be predicted forsome simple cases? How does diffusion depend on structure and temperatureContent Diffusion- Steady and Non-Steady State Simple Diffusion Inter-diffusion Self-diffusion...

  14. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 4: Structures via Diffusion

    28 Sep 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Structures via DiffractionGoals Define basic ideas of diffraction (using x-ray, electrons, or neutrons, which, although they are particles, they can behave as waves) and show how to determine: Crystal Structure Miller Index Planes and Determine the Structure Identify cell symmetry Learning...

  15. Computational Nanoscience, Lecture 21: Quantum Monte Carlo, part II

    15 May 2008 | | Contributor(s):: Jeffrey C Grossman, Elif Ertekin

    This is our second lecture in a series on Quantum Monte Carlo methods. We describe the Diffusion Monte Carlo approach here, in which the approximation to the solution is not restricted by choice of a functional form for the wavefunction. The DMC approach is explained, and the fixed node...

  16. MuGFET

    17 Jan 2008 | | Contributor(s):: SungGeun Kim, Gerhard Klimeck, Sriraman Damodaran, Benjamin P Haley

    Simulate the nanoscale multigate-FET structures (finFET and nanowire) using drift diffusion approaches

  17. Nanotechnology Research Opportunities within the Forest Products Industry

    28 Apr 2008 | | Contributor(s):: Robert J. Moon

    This talk will provide an overview of research opportunities withinforest products industry. There will be a general description of theanatomical and chemical structure of wood, their connection to wood's anisotropic properties and how nanotechnology research can be applied to provide unique...

  18. Lecture 20: Diffusion - Part2

    23 Apr 2008 | | Contributor(s):: Paul R Selvin

    Diffusion and bacteria moving, power consumed by bacteria, Introduction to Reynolds number, Where Bacteria Live, How E. Coli move and swim,

  19. Lecture 17: Diffusion - Part 1

    15 Apr 2008 | | Contributor(s):: Paul R Selvin

    Diffusion, Directed motors, Thermal motion, nerve synapse, Efficiency of Diffusion

  20. BJT Lab

    06 Feb 2008 | | Contributor(s):: Saumitra Raj Mehrotra, Abhijeet Paul, Gerhard Klimeck, Dragica Vasileska, Gloria Wahyu Budiman

    This tool simulates a Bipolar Junction Transistor (BJT) using a 2D mesh. Powered by PADRE.