Tags: crystals

Resources (21-40 of 45)

  1. Crystal Structures - Packing Efficiency Exercise

    15 Jun 2010 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck

    Consider the most efficient way of packing together equal-sized spheres and stacking close-packed atomic planes in three dimensions. For example, if plane A lies beneath plane B, there are two possible ways of placing an additional atom on top of layer B. If an additional layer was placed...

  2. Crystal Structures

    08 Jun 2010 | Contributor(s):: David K. Ferry, Dragica Vasileska, Gerhard Klimeck

    In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a basis, a set of atoms arranged in a particular way, and a lattice. The basis is located upon the points of a lattice spanned by lattice vectors, which is an...

  3. Crystal Directions and Miller Indices

    08 Jun 2010 | Contributor(s):: David K. Ferry, Dragica Vasileska, Gerhard Klimeck

    Miller indices are a notation system in crystallography for planes and directions in crystal lattices. In particular, a family of lattice planes is determined by three integers, l, m, and n, the Miller indices. They are written (lmn) and denote planes orthogonal to a direction (l,m,n) in the...

  4. 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...

  5. Buckyball C60

    16 Apr 2010 | | 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. …

  6. Illinois ECE 440: Introduction to Crystal Properties Homework

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

    This homework Assignment covers basic introduction to Material Properties and Crystal Structures.

  7. X-ray Diffraction and Reflectivity Analysis of Thin Films and Nanomaterials

    29 Dec 2009 | | Contributor(s):: Mauro Sardela

    A review of x-ray analysis techniques applied to the characterization of nanomaterials will be presented with focus on x-ray lab source instrumentation similar to the facilities available at the Birck Nanotechnology Center. Practical aspects of data acquisition and interpretation using x-ray...

  8. ME 597 Lecture 1: Introduction to Basic Quantum Mechanics

    01 Sep 2009 | | Contributor(s):: Ron Reifenberger

    Note: This lecture has been revised since its original presentation.Topics:Introduction to Basic Quantum MechanicsEnergy States in Periodic Crystals

  9. Band Structure Lab Demonstration: Bulk Strain

    12 Jun 2009 | | 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.

  10. 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.

  11. Crystal Viewer Demonstration: Bravais Lattices 2

    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

  12. Crystal Viewer Demonstration: Various Crystal Systems

    12 Jun 2009 | | 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.

  13. ABINIT: First-Time User Guide

    09 Jun 2009 | | Contributor(s):: Benjamin P Haley

    This first-time user guide provides an introduction to using ABINIT on nanoHUB. We include a very brief summary of Density Functional Theory along with a tour of the Rappture interface. We discuss the default simulation (what happens if you don't change any inputs, and just hit "simulate") as...

  14. Crystal Viewer Tool: First-Time User Guide

    01 Jun 2009 | | Contributor(s):: Abhijeet Paul, Benjamin P Haley, Gerhard Klimeck

    This first-time user guide is an introduction to the Crystal Viewer Tool lab. It provides basic definitions, including a definition of crystals. Any suggestions for changes and corrections are welcomed.

  15. 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...

  16. ECE 606 Lecture 2: Geometry of Periodic Crystals

    28 Jan 2009 | | Contributor(s):: Muhammad A. Alam

    Outline:Volume & surface issues for BCC, FCC, Cubic latticesImportant material systemsMiller indices ConclusionsHelpful software tool: Crystal Viewer in the ABACUS tool suite.

  17. ECE 606 Lecture 1: Introduction

    28 Jan 2009 | | Contributor(s):: Muhammad A. Alam

    Outline:Course information Current flow in semiconductors Types of material systems Classification of crystals

  18. 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

  19. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 3: Crystallographic Points, Directions, and Planes

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

    Crystallographic Points, Directions, and PlanesIssues to Address...How to define points, directions, planes, as well aslinear, planar, and volume densitiesDefine basic terms and give examples of each: Points (atomic positions) Vectors (defines a particular direction - plane normal) Miller...

  20. Illinois ECE 440 Solid State Electronic Devices, Lecture 2: Crystal Lattices

    14 Aug 2008 | | Contributor(s):: Eric Pop

    Crystal Lattices:Periodic arrangement of atomsRepeated unit cells (solid-state)Stuffing atoms into unit cellsDiamond (Si) and zinc blende (GaAs)crystal structuresCrystal planesCalculating densities