Models of electromagnetic properties of composite media

dc.contributor.advisor Nicola Bowler
dc.contributor.author Liu, Jin
dc.contributor.department Materials Science and Engineering
dc.date 2018-08-11T12:17:57.000
dc.date.accessioned 2020-06-30T02:44:31Z
dc.date.available 2020-06-30T02:44:31Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2012
dc.date.embargo 2013-06-05
dc.date.issued 2012-01-01
dc.description.abstract <p>Electromagnetic composite materials have</p> <p>attracted much interest in recent years, due to their desirable</p> <p>microwave and optical applications. One class of these is negative</p> <p>refractive index materials, or double negative materials, in which</p> <p>both permittivity and permeability of materials are simultaneously</p> <p>negative. Many exciting potential applications of double negative</p> <p>materials have been proposed, such as the perfect lens and the</p> <p>cloaking device. Here, a simple-cubic lattice of identical,</p> <p>homogeneous or coated non-metallic spherical particles embedded in a</p> <p>matrix is analyzed. One contribution of this work is the derivation</p> <p>of an analytical formula for the threshold dielectric loss angle of</p> <p>spherical inclusions, above which DNG behavior of the system is</p> <p>extinguished. In addition, analytical formulas are derived from</p> <p>which double negative bandwidth of a simple-cubic lattice of</p> <p>identical, magnetodielectric homogeneous or coated spheres can be</p> <p>determined.</p> <p>Another case of interest is nanocomposites, which commonly consist</p> <p>of nanoparticles embedded in a polymer matrix. These materials show</p> <p>superior dielectric or mechanical performance by taking advantage of</p> <p>the merits of their individual non-hybrid components. In one</p> <p>manifestation, diblock copolymers can be utilized to spatially</p> <p>separate nanoparticles by incorporating them in one block,</p> <p>preferentially, to form a long-range ordered structure. By designing</p> <p>this structure, the electromagnetic properties can be tailored for</p> <p>potential applications in novel devices. Here, molecular dynamics of</p> <p>polymer matrices and nanocomposites is analyzed by parametric</p> <p>modeling of their dielectric spectra, supporting design of a</p> <p>composite with desired electromagnetic properties.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/12695/
dc.identifier.articleid 3702
dc.identifier.contextkey 4186451
dc.identifier.doi https://doi.org/10.31274/etd-180810-2698
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/12695
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/26884
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/12695/Liu_iastate_0097E_12942.pdf|||Fri Jan 14 19:27:34 UTC 2022
dc.subject.disciplines Mechanics of Materials
dc.subject.keywords Composite
dc.subject.keywords Dielectric Properties
dc.subject.keywords Electromagnetic Properties
dc.subject.keywords Models
dc.title Models of electromagnetic properties of composite media
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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