Support

Support Options

Submit a Support Ticket

 

Tags: multiscale models

Description

Nanotechnology sometimes involves mixing something very small into a larger, more conventional system. For example, mixing carbon nanotubes into a conventional polymer gives it added strength. Or, using a carbon nanotube as the channel between two larger, source-drain contacts creates a transistor with improved channel mobility. But simulating such systems becomes a huge challenge. The smaller parts of the system must be solved with great accuracy–for example, by simulating each atom within a carbon nanotube. But the same approach can't possibly be applied to the larger system–for example, to each atom in the thousands of polymer molecules in a realistic sample–or the whole problem would be too big to solve!

Multi-scale methods attempt to solve the problem by stitching together smaller domains (where atomistic models apply) and larger domains (where continuum models apply) into a coherent solution.

Learn more about multi-scale methods from the resources on this site, listed below.

Resources (21-33 of 33)

  1. Hierarchical Physical Models for Analysis of Electrostatic Nanoelectromechanical Systems (NEMS)

    05 Jan 2006 | Online Presentations | Contributor(s): Narayan Aluru

    This talk will introduce hierarchical physical models and efficient computational techniques for coupled analysis of electrical, mechanical and van der Waals energy domains encountered in...

    http://nanohub.org/resources/850

  2. First Principles-based Atomistic and Mesoscale Modeling of Materials

    01 Dec 2005 | Online Presentations | Contributor(s): Alejandro Strachan

    This tutorial will describe some of the most powerful and widely used techniques for materials modeling including i) first principles quantum mechanics (QM), ii) large-scale molecular dynamics...

    http://nanohub.org/resources/434

  3. Bandstructure in Nanoelectronics

    01 Nov 2005 | Online Presentations | Contributor(s): Gerhard Klimeck

    This presentation will highlight, for nanoelectronic device examples, how the effective mass approximation breaks down and why the quantum mechanical nature of the atomically resolved material...

    http://nanohub.org/resources/381

  4. On the Reliability of Micro-Electronic Devices: An Introductory Lecture on Negative Bias Temperature Instability

    28 Sep 2005 | Online Presentations | Contributor(s): Muhammad A. Alam

    In 1930s Bell Labs scientists chose to focus on Siand Ge, rather than better known semiconductors like Ag2S and Cu2S, mostly because of their reliable performance. Their choice was rewarded with...

    http://nanohub.org/resources/193

  5. Modeling and Simulation of Sub-Micron Thermal Transport

    26 Sep 2005 | Online Presentations | Contributor(s): Jayathi Murthy

    In recent years, there has been increasing interest in understanding thermal phenomena at the sub-micron scale. Applications include the thermal performance of microelectronic devices,...

    http://nanohub.org/resources/192

  6. Parallel Computing for Realistic Nanoelectronic Simulations

    12 Sep 2005 | Online Presentations | Contributor(s): Gerhard Klimeck

    Typical modeling and simulation efforts directed towards the understanding of electron transport at the nanometer scale utilize single workstations as computational engines. Growing understanding...

    http://nanohub.org/resources/191

  7. Numerical Aspects of NEGF: The Recursive Green Function Algorithm

    14 Jun 2004 | Online Presentations | Contributor(s): Gerhard Klimeck

    Numerical Aspects of NEGF: The Recursive Green Function Algorithm

    http://nanohub.org/resources/165

  8. HPC and Visualization for multimillion atom simulations

    21 Jun 2005 | Online Presentations | Contributor(s): Gerhard Klimeck

    This presentation gives an overview of the HPC and visulaization efforts involving multi-million atom simulations for the June 2005 NSF site visit to the Network for Computational Nanotechnology.

    http://nanohub.org/resources/187

  9. Multiscale Modeling of the Mechanical Behavior of Polymer-Based Nanocomposites

    25 Mar 2004 | Online Presentations | Contributor(s): Catalin Picu

    Polymers filled with nanoscale fillers (carbon nanotubes or nanoparticles) exhibit enhanced properties compared with the neat polymer and with the polymer filled with micron-sized fillers at same...

    http://nanohub.org/resources/158

  10. Quantum Electromechanical Systems: Are we there yet?

    05 Feb 2004 | Online Presentations | Contributor(s): Andrew Cleland

    Electrons moving in a conductor can transfer momentum to the lattice via collisions with impurities and boundaries, giving rise to a fluctuating mechanical stress tensor. Driving electrons out of...

    http://nanohub.org/resources/151

nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.