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Graphene is a one-atom-thick planar sheet of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. The term Graphene was coined as a combination of graphite and the suffix -ene by Hanns-Peter Boehm, who described single-layer carbon foils in 1962. Graphene is most easily visualized as an atomic-scale chicken wire made of carbon atoms and their bonds. The crystalline or "flake" form of graphite consists of many graphene sheets stacked together.
Learn more about quantum dots from the many resources on this site, listed below. More information on Graphene can be found here.
Ripples and Warping of Graphene: A Theoretical Study
08 Jun 2010 | | Contributor(s):: Umesh V. Waghmare
We use first-principles density functional theory based analysis to understand formation of ripples in graphene and related 2-D materials. For an infinite graphene, we show that ripples are linked with a low energy branch of phonons that exhibits quadratic dispersion at long wave-lengths. Many...
13 May 2010 | | Contributor(s):: Chanaka Suranjith Rupasinghe, Mufthas Rasikim
ninithi which is a free and opensource modelling software, can be used to visualize and analyze carbon allotropes used in nanotechnology. You can generate 3-D visualization of Carbon nanotubes, Fullerenes, Graphene and Carbon nanoribbons and analyze the band structures of nanotubes and graphene.
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...
Graphene nanoribbon bandstructure
17 Apr 2010 | | 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...
Surface Characterization Studies of Carbon Materials: SS-DNA, SWCNT, Graphene, HOPG
16 Feb 2010 | | Contributor(s):: Dmitry Zemlyanov
In this presentation examples of surface characterization studies of carbon specimens will be presented. (1) In particularly, the systematic XPS (X-ray photoelectron spectroscopy) characterization of graphene grown on the SiC surface will be reported. This work demonstrates a use for XPS to...
Lecture 4: Graphene: An Experimentalist's Perspective
12 Feb 2010 | | Contributor(s):: Joerg Appenzeller
ECE 656 Lecture 27: Scattering of Bloch Electrons
13 Nov 2009 | | Contributor(s):: Mark Lundstrom
Outline:Umklapp processesOverlap integralsADP Scattering in graphene
Lecture 5: NEGF Simulation of Graphene Nanodevices
23 Sep 2009 | | Contributor(s):: Supriyo Datta
2009 NCN@Purdue Summer School: Electronics from the Bottom Up
22 Sep 2009 | | Contributor(s):: Supriyo Datta, Mark Lundstrom, Muhammad A. Alam, Joerg Appenzeller
The school will consist of two lectures in the morning on the Nanostructured Electronic Devices: Percolation and Reliability and an afternoon lecture on Graphene Physics and Devices. A hands on laboratory session will be available in the afternoons.
Low Bias Transport in Graphene: An Introduction (lecture notes)
22 Sep 2009 | | Contributor(s):: Mark Lundstrom, tony low, Dionisis Berdebes
These notes complement a lecture with the same title presented by Mark Lundstrom and Dionisis Berdebes, at the NCN@Purdue Summer School, July 20-24, 2009.
Colloquium on Graphene Physics and Devices
22 Sep 2009 | | Contributor(s):: Joerg Appenzeller, Supriyo Datta, Mark Lundstrom
This short course introduces students to graphene as a fascinating research topic as well as to develop their skill in problem solving using the tools and techniques of electronics from the bottom up.
Lecture 6: Graphene PN Junctions
22 Sep 2009 | | Contributor(s):: Mark Lundstrom
Outline:IntroductionElectron optics in grapheneTransmission across NP junctionsConductance of PN and NN junctionsDiscussionSummary
Lecture 3: Low Bias Transport in Graphene: An Introduction
18 Sep 2009 | | Contributor(s):: Mark Lundstrom
Outline:Introduction and ObjectivesTheoryExperimental approachResultsDiscussionSummaryLecture notes are available for this lecture.
ECE 656 Lecture 4: Density of States - Density of Modes
14 Sep 2009 | | Contributor(s):: Mark Lundstrom
Outline:Density of states Example: graphene Density of modes Example: graphene Summary
Crystal Viewer Demonstration: Bravais Lattices
12 Jun 2009 | | 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.
Crystal Viewer Demonstration: Bravais Lattices 2
This video shows the exploration of several crystal structures using the Crystal Viewer tool. Several powerful features of this tool are demonstrated
Crystal Viewer Demonstration: Various Crystal Systems
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.
ECE 659 Lecture 33: Thermoelectricity
16 Apr 2009 | | Contributor(s):: Supriyo Datta
Carrier Statistics Lab: First-Time User Guide
09 Mar 2009 | | Contributor(s):: Abhijeet Paul, Gerhard Klimeck, Benjamin P Haley, Saumitra Raj Mehrotra
This first-time user guide is an introduction to the Carrier Statistics Lab . It provides basic definitions, guidance on how to run the tool, and suggested exercises to help users get accustomed to the idea of distribution functions as well as how these functions are used in determining the...
Assembly for Nanotechnology Survey Courses
05 Nov 2008 | | Contributor(s):: Gerhard Klimeck, Dragica Vasileska
Educational Tools for Classroom and Homework use to introduce nanotechnology concepts