Sökning: "Graphene Mechanics"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Graphene Mechanics.

  1. 1. Theory and Application of the Mechanics of Graphene Sheets

    Författare :Juan Atalaya; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Graphene; Elasticity Theory; Nonlinear Dynamics and NEM-based Mass Spectrometry.;

    Sammanfattning : Starting from an atomistic approach, I derive a hierarchy of successively more simplified continuum elasticity descriptions for modeling the mechanical properties of suspended graphene sheets. It is shown that graphene sheets with clamped edges have an intrinsic nonlinear mechanical response due to a variable tension induced by stretching. LÄS MER

  3. 2. NONLINEAR MECHANICS OF GRAPHENE AND MASS-LOADING INDUCED DEPHASING IN NANORESONATORS

    Författare :Juan Atalaya; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dephasing in Nanomechanical Resonators; Nonlinear Dynamics; Graphene Mechanics;

    Sammanfattning : I summarize the results of my research in the subjects of nonlinear mechanics of grapheneresonators, mass-loading induced dephasing in nanomechanical resonators and spintronicsbasedmesoscopic heat engines for cooling the fundamental flexural mode of a CNT resonator.This thesis consists of three parts. LÄS MER

  4. 3. Computational studies of graphene and single walled carbon nanotube growth and carbonaceous polymeric nanocomposites

    Författare :Shayesteh Haghighatpanah; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Graphene; functionalization; carbon nanotube; Monte Carlo; tight binding; polyacrylonitrile; polyethylene; molecular mechanics; molecular dynamics.;

    Sammanfattning : Graphene and single walled carbon nanotube (SWNT) has attracted a lot of attention in different fields of science due to its unique electrical, mechanical, and optical properties. Controlling the growth of graphene and SWNT is a very topical subject and critical for producing material with desired properties since their properties are highly dependent on their atomic structure and it is often desirable that the material contains very few or (if possible) no defects. LÄS MER

  5. 4. On error controlled atomistic-to-continuum modeling with application to graphene monolayers

    Författare :Arash Memarnahavandi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quasi-Continuum; stress-free; atomistic-to-continuum; homogenization; adaptivity;

    Sammanfattning : In order to consider virtual materials, i.e. materials that are not manufactured yet, it can be advantageous to model physical phenomena on a lower length scale than the macroscopic one. In such a case, homogenization (or coarse-graining) can be a useful tool. LÄS MER

  7. 5. Modelling of Molecular-Scale Nanoelectromechanical Systems

    Författare :Caroline Huldt; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; shuttle; mesoscopic; NEMS; graphene; multiscale; DFTB; DFT;

    Sammanfattning : Nanoelectromechanical systems (NEMS) couple electronic and mechanical degrees of freedom in a nanoscopic structure. The small size introduces many atomistic and quantum mechanical features which on the one hand open up for interesting new features and possibilities but on the other hand make it very difficult to formulate quantitative predictions. LÄS MER