PN Junction Lab Demonstration: Asymmetric PN Junctions

11 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the simulation and analysis of a several PN junctions using PN Junction Lab, which is powered by PADRE. Several powerful analytic features of this tool are demonstrated.

3D Molecular Models

21 Jun 2007 | Animations | Contributor(s): Nicholas Vargo

This animation was created as part of the Children's Museum Nanotechnology Exhibit to give the viewer an idea of what objects look like at the nano-level. The molecules range from something as small as caffeine to major proteins and viruses.

Introduction to Scanning Tunneling Microscopy

20 Apr 2007 | Animations | Contributor(s): Hyung-Seok Hahm

This is a 60 second movie clip with an introduction to Scanning Tunneling Microscopy(STM). Design goals are - Give an idea of what STM looks like- Provide an overview of what STM does and how it worksProduced by Imran Sobh and Hyung-Seok HahmAs part of instructional materials by...

Crystal Viewer Demonstration: Bravais Lattices

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the exploration of several crystal structures using the Crystal Viewer tool. Several powerful features of this tool are demonstrated.

Band Structure Lab Demonstration: Bulk Strain

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck

This video shows an electronic structure calculation of bulk Si using Band Structure Lab. Several powerful features of this tool are demonstrated.

MOSFet Demonstration: MOSFET Device Simulation and Analysis

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the simulation and analysis of a MOSFET device using the MOSFet tool. Several powerful analytic features of this tool are demonstrated.

MOSCap Demonstration: MOS Capacitor Simulation

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the simulation of a MOS capacitor using the MOSCAP tool. Several powerful analytic features of this tool are demonstrated.

Crystal Viewer Demonstration: Various Crystal Systems

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the use of the Crystal Viewer Tool to visualize several crystal systems, including Si, GaAs, C60 Buckyball, and a carbon nanotube. Crystal systems are rotated in 3D, zoomed in and out, and the lattice style changes from sticks and balls to lines to spheres.

Crystal Viewer Demonstration: Bravais Lattices 2

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the exploration of several crystal structures using the Crystal Viewer tool. Several powerful features of this tool are demonstrated

Buckyball C60

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

A fullerene is any molecule composed entirely of carbon, and can take the form of hollow spheres, ellipsoids, or tubes. Spherical fullerenes (often referred to as "buckyballs") are one of the known structurally different form of carbon. C60 are the most common of buckyball structures. …

Operation of Scannig Tunneling Microscopy

20 Apr 2007 | Animations | Contributor(s): Hyung-Seok Hahm

This is a 60-second movie clip with a narration of how Scanning Tunneling Microscopy(STM) operates. Produced by Eric Meyer, Imran Sobh and Hyung-Seok Hahm Beckman InstituteUniversity of Illinois at Urbana-Champaign As part of instructional materials by National Center for Learning and Teaching in...

Periodic Potential Lab Demonstration: Standard Kroenig-Penney Model

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the simulation of a 1D square well using the Periodic Potential Lab. The calculated output includes plots of the allowed energybands, a table of the band edges and band gaps, plots of reduced and expanded dispersion relations, and plots comparing the dispersion relations to those...

Piece-Wise Constant Potential Barriers Tool Demonstration: Bandstructure Formation with Finite Superlattices

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck, Benjamin P Haley

This video shows the simulation and analysis of a systems with a series of potential barriers. Several powerful analytic features of Piece-wise Constant Potential Barrier Tool (PCPBT) are demonstrated.

Electronic band structure

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

In solid-state physics, the electronic band structure (or simply band structure) of a solid describes ranges of energy in which an electron is "forbidden" or "allowed". The band structure is also often called the dispersion or the E(k) relationship. It is a mathematical...

RTD with NEGF Demonstration: Basic RTD Asymmetric

03 Jun 2009 | Animations | Contributor(s): Gerhard Klimeck

This video shows the analysis of a 2 barrier Resonant Tunneling Diode (RTD) over 21 bias points using RTDLab. Several powerful features of this tool are demonstrated.

PN junction in forward bias

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

A PN junction is formed by joining p-type and n-type doped semiconductors together in very close contact. The p- and n-type semiconductors are conducting because of the available free carriers. However, because the carriers diffuse into the adjoining p and n regions by a process called...

Graphene nanoribbon bandstructure

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

Graphene nanoribbons (often abbreviated as GNR) are planar strips of graphene with a thickness of approximately one atom. Carbon atoms in graphene are sp2-hybridized with a carbon-carbon bond length of approximately 0.142 nm. As an electronic material, graphene exhibits many desirable properties,...

3D wavefunctions

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

In quantum mechanics the time-independent Schrodinger's equation can be solved for eigenfunctions (also called eigenstates or wave-functions) and corresponding eigenenergies (or energy levels) for a stationary physical system. The wavefunction itself can take on negative and positive values and...

Multi-walled Carbon Nanotubes and Mesothelioma: An ICON Backgrounder

19 Feb 2009 | Animations | Contributor(s): Kristen Kulinowski

Two studies published in the Journal of Toxicological Sciences and Nature Nanotechnology in 2008 have demonstrated that some multi-walled carbon nanotubes (MWCNT or MWNT) can induce in mice a response similar to that induced by certain asbestos fibers. At a first glance, certain MWCNT and...

How Semiconductors and Transistors Work

20 Nov 2005 | Animations | Contributor(s): John C. Bean

This animation shows how semiconductor crystals work and how they are used to make transistor switches.