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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 33 results (feed)

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

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    28 Sep 2005 | Online Presentations | Contributor(s): Muhammad 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 the …

    http://nanohub.org/resources/193

  2. Nano-Scale Device Simulations Using PROPHET

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    20 Jan 2006 | Online Presentations | Contributor(s): Yang Liu, Robert Dutton

    These two lectures are aimed to give a practical guide to the use of a general device simulator (PROPHET) available on nanoHUB. PROPHET is a partial differential equation (PDE) solver that offers …

    http://nanohub.org/resources/973

  3. Nano-Scale Device Simulations Using PROPHET-Part I: Basics

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    20 Jan 2006 | Online Presentations | Contributor(s): Yang Liu, Robert Dutton

    Part I covers the basics of PROPHET, including the set-up of simulation structures and parameters based on pre-defined PDE systems.

    http://nanohub.org/resources/974

  4. Understanding Phonon Dynamics via 1D Atomic Chains

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    04 Apr 2006 | Online Presentations | Contributor(s): Timothy S Fisher

    Phonons are the principal carriers of thermal energy in semiconductors and insulators, and they serve a vital role in dissipating heat produced by scattered electrons in semiconductor devices. …

    http://nanohub.org/resources/1186

  5. Towards Multi-Scale Modeling of Carbon Nanotube Transistors

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    20 Sep 2006 | Publications | Contributor(s): Jing Guo, Supriyo Datta, Mark Lundstrom, M. P. Anantram

    Multiscale simulation approaches are needed in order to address scientific and technological questions in the rapidly developing field of carbon nanotube electronics. In this paper, we describe …

    http://nanohub.org/resources/1818

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