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Axial and Radial Heat Transfer in a Surface Phonon Polariton (SPhP) Crystal.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Axial and Radial Heat Transfer in a Surface Phonon Polariton (SPhP) Crystal./
作者:	Adewuyi, Olalekan Sunday.
面頁冊數:	1 online resource (145 pages)
附註:	Source: Dissertation Abstracts International, Volume: 78-09(E), Section: B.
Contained By:	Dissertation Abstracts International78-09B(E).
標題:	Mechanical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9781369713589

Axial and Radial Heat Transfer in a Surface Phonon Polariton (SPhP) Crystal.
Adewuyi, Olalekan Sunday.

Axial and Radial Heat Transfer in a Surface Phonon Polariton (SPhP) Crystal. - 1 online resource (145 pages)

Source: Dissertation Abstracts International, Volume: 78-09(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

Surface phonon polaritons (SPhP) are coupled states of polar atomic vibrations (optical phonons) and electromagnetic waves. These surface states are restricted to the interfaces of the material and do not generally participate in energy transport beyond the interface. However, for certain small-scale geometries of polar materials, the SPhP can participate in such a way that energy transport is significantly increased, particularly for the mid-infrared thermal radiation temperatures predicted by Wien's law (around room temperature). This dissertation theoretically shows the dramatic effect of SPhP energy transport at room temperature in a nanoscale silicon dioxide particle chain, that is an ideal one-dimensional SPhP crystal.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369713589Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Axial and Radial Heat Transfer in a Surface Phonon Polariton (SPhP) Crystal.
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245 1 0 $a Axial and Radial Heat Transfer in a Surface Phonon Polariton (SPhP) Crystal.
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300 $a 1 online resource (145 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 78-09(E), Section: B.
500 $a Adviser: James S. Hammonds.
502 $a Thesis (Ph.D.) $c Howard University $d 2016.
504 $a Includes bibliographical references
520 $a Surface phonon polaritons (SPhP) are coupled states of polar atomic vibrations (optical phonons) and electromagnetic waves. These surface states are restricted to the interfaces of the material and do not generally participate in energy transport beyond the interface. However, for certain small-scale geometries of polar materials, the SPhP can participate in such a way that energy transport is significantly increased, particularly for the mid-infrared thermal radiation temperatures predicted by Wien's law (around room temperature). This dissertation theoretically shows the dramatic effect of SPhP energy transport at room temperature in a nanoscale silicon dioxide particle chain, that is an ideal one-dimensional SPhP crystal.
520 $a In this work, near order-of-magnitude thermal conductance enhancements in silicon dioxide-based SPhP crystal bounded by thermal reservoirs boundaries were predicted. Results show that these enhancements are caused by an increase in the density of SPhP modes on silicon dioxide nanoparticle chains. The model that was developed shows that conduction depends inversely on the resistance to radiation flow and directly depends on the resistance provided by the nanoparticles in the chain, since nanoparticle resistance physically involves the transfer of radiation energy to the lattice through a dissipation process. This is because the background SPhP modes established in the gap between thermal boundaries are dissipated and conducted along the nanoparticle chain. The geometry and optical properties of the nanoparticle chains are tuned to resonate with the background modes, resulting in an increase in SPhP density of states and the thermal energy conducted along the nanoparticle chain. It was also shown that the temperature, dielectric constant, distance between and the size of nanoparticles could be tuned to minimize the resistance to phonon polariton flow, or increase the current flow rate in order to cause an increase in thermal energy conducted along the nanoparticle chain. Fluctuation dissipation theorem was used to estimate the resistance to radiation imposed by the dielectric system, and to determine the resistance provided by the nanoparticle chain to convert radiation energy to lattice vibrations. The predicted results are general and can be extended to 3D arrays of silicon dioxide nanoparticles. The theoretical predictions in this work are validated by recent thermal conductivity measurements of silicon dioxide nanoparticle beds observed in Tervo el al. "High thermal conductivity in polaritonic SiO2 nanoparticle beds", Material Horizon(2016) and demonstrate a path to highly tunable, and greatly enhanced thermal conductance properties not currently available in natural materials.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Mechanical engineering. $3 557493
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Howard University. $b Mechanical Engineering. $3 1178876
773 0 $t Dissertation Abstracts International $g 78-09B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10193190 $z click for full text (PQDT)