scholarly journals Size effects in energy transport between thermal contacts mediated by nanoparticles

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
George Y. Panasyuk ◽  
Kirk L. Yerkes ◽  
Timothy J. Haugan
Keyword(s):  
Size Effects ◽  
Energy Transport ◽  
Thermal Contacts

Pump-Probe Experimental Study of Phonon Reflectivity at an Interface and Phonon Relaxation Time

2005 ◽  
Author(s):  
Ronggui Yang ◽  
Xiaoyuan Chen ◽  
Aaron Schmidt ◽  
Gang Chen
Keyword(s):  
Heat Transfer ◽  
Thermal Management ◽  
Thermal Transport ◽  
Size Effects ◽  
Energy Transport ◽  
Quantum Size Effects ◽  
Pump Probe ◽  
Sensor Development ◽  
Quantum Size ◽  
Phonon Relaxation Time

Heat transfer in nanostructures differs significantly from that in macrostructures because of classical and quantum size effects on energy carriers, i.e., phonons, electrons, and photons [1–3]. Understanding thermal transport in nanostructures is of fundamental importance to a variety of technologies, including thermal management of nanoelectronics and optoelectronics, energy conversion, nanofabrication, and sensor development. A better understanding of the energy transport at nanoscale calls for both simulations and experimental techniques on thermal transport in nanostructures.

Size Effects in Quasi-Static Energy Transport for Microscopic Quantum Systems

2014 ◽  
Vol 1704 ◽  
Author(s):  
George Y. Panasyuk ◽  
Timothy J. Haugan ◽  
Kirk L. Yerkes
Keyword(s):  
Size Effects ◽  
Energy Transport ◽  
Finite Size ◽  
Temporal Variations ◽  
Quantum Systems ◽  
Short Time Scale ◽  
Fourier’S Law ◽  
Static Energy ◽  
A Chain ◽  
Fourier's Law

ABSTRACTWe consider finite size effects on energy transfer between nanoparticles mediated by quantum systems. The nanoparticles are considered as heat reservoirs with a finite number of modes. An expression for the quasi-static energy transport between the heat reservoirs having a finite mode frequency spacing Δ is derived. The resulting equations describing long-term (t ≥1/Δ) relaxation for the mode temperatures and the average temperatures of the nanoparticles are solved. The solutions depend on small number of measurable parameters and show unusual peculiarities in their temporal variations. As is shown, Fourier’s law in a chain of identical subsystems (nanoparticles) can be validated only on a short time scale. For a larger times, when t ∼ 1/Δ, the temperatures of different modes deviate from each other, thus preventing thermal equilibrium in each subsystem, and the validity of Fourier’s law cannot be established.

Energy, transport, and consumption in the Industrial Revolution

2019 ◽  
Vol 42 ◽  
Author(s):  
Joseph A. Tainter ◽  
Temis G. Taylor
Keyword(s):  
Mass Production ◽  
Industrial Revolution ◽  
Energy Transport ◽  
Underlying Assumption

Abstract We question Baumard's underlying assumption that humans have a propensity to innovate. Affordable transportation and energy underpinned the Industrial Revolution, making mass production/consumption possible. Although we cannot accept Baumard's thesis on the Industrial Revolution, it may help explain why complexity and innovation increase rapidly in the context of abundant energy.

Search for quantum size effects in ultrathin epitaxial metallic films

1991 ◽  
Vol 16 (6) ◽  
pp. 623-638 ◽  
Author(s):  
P.A. Badoz ◽  
F. Arnaud d'Avitaya ◽  
E. Rosencher
Keyword(s):  
Size Effects ◽  
Quantum Size Effects ◽  
Metallic Films ◽  
Quantum Size

Cluster size effects revisited

1995 ◽  
Vol 92 ◽  
pp. 205-225 ◽  
Author(s):  
J Jortner
Keyword(s):  
Size Effects ◽  
Cluster Size
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