Phonon Transport through Nanoscale Contact in Tip-Based Thermal Analysis of Nanomaterials

Cited 6 time in webofscience Cited 0 time in scopus
  • Hit : 245
  • Download : 39
Nanomaterials have been actively employed in various applications for energy and sustainability, such as biosensing, gas sensing, solar thermal energy conversion, passive radiative cooling, etc. Understanding thermal transports inside such nanomaterials is crucial for optimizing their performance for different applications. In order to probe the thermal transport inside nanomaterials or nanostructures, tip-based nanoscale thermometry has often been employed. It has been well known that phonon transport in nanometer scale is fundamentally different from that occurred in macroscale. Therefore, Fourier's law that relies on the diffusion approximation is not ideally suitable for describing the phonon transport occurred in nanostructures and/or through nanoscale contact. In the present study, the gray Boltzmann transport equation (BTE) is numerically solved using finite volume method. Based on the gray BTE, phonon transport through the constriction formed by a probe itself as well as the nanoscale contact between the probe tip and the specimen is investigated. The interaction of a probe and a specimen (i.e., treated as a substrate) is explored qualitatively by analyzing the temperature variation in the tip-substrate configuration. Besides, each contribution of a probe tip, tip-substrate interface, and a substrate to the thermal resistance are analyzed for wide ranges of the constriction ratio of the probe.
Publisher
MDPI AG
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

RADIATIVE HEAT-TRANSFER; FORCE MICROSCOPY; CONSTRICTIONS; NANOWIRES

Citation

NANOMATERIALS, v.7, no.8

ISSN
2079-4991
DOI
10.3390/nano7080200
URI
http://hdl.handle.net/10203/226305
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
000408759500006.pdf(574.99 kB)Download
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 6 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0