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Applied Physics Letters / Volume 98 / Issue 12 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 98, 121902 (2011); http://dx.doi.org/10.1063/1.3567537 (3 pages)

Mechanical properties of ultralow-dielectric-constant mesoporous amorphous silica structures: Effects of pore morphology and loading mode

M. Rauf Gungor1, James J. Watkins1,2, and Dimitrios Maroudas1

1Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-3110, USA
2Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003-3110, USA

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(Received 1 December 2010; accepted 25 February 2011; published online 21 March 2011)

We report results for the dependence of the mechanical properties of ordered mesoporous silica structures on the pore diameter based on molecular-dynamics simulations. We examine structures with spherical pores arranged in a simple cubic lattice and cylindrical pores arranged in a square lattice subjected to uniaxial tension and compression; for the structures with cylindrical pores, both radial and axial loading is studied with respect to the pore orientation. Our analysis provides a unifying explanation to the observed mechanical response based on the mechanical loading effects on the pore wall thickness.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

amorphous state, compressibility, mesoporous materials, molecular dynamics method, permittivity, silicon compounds

PACS

  • 77.22.Ch

    Permittivity (dielectric function)

  • 61.43.Gt

    Powders, porous materials

  • 61.43.Bn

    Structural modeling: serial-addition models, computer simulation

  • 62.20.F-

    Deformation and plasticity

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3567537

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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