<i>Colloquium</i>: Phononics: Manipulating heat flow with electronic analogs and beyond

We discuss thermal rectification and thermoelectric energy conversion from the perspective of nonequilibrium statistical mechanics and dynamical systems theory. After preliminary considerations on the dynamical foundations of the phenomenological Fourier law in classical and quantum mechanics, we illustrate ways to control the phononic heat flow and design thermal diodes. Finally, we consider the coupled transport of heat and charge and discuss several general mechanisms for optimizing the figure of merit of thermoelectric efficiency.

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“…Possibilities to manipulate phonons and devise heat diodes, transistors, thermal logic gates and thermal memories are reviewed in Ref. [100].…”

Section: Building An Actual Thermal Rectifiermentioning

confidence: 99%

From Thermal Rectifiers to Thermoelectric Devices

Benenti

Casati

Mejía‐Monasterio

et al. 2016

Thermal Transport in Low Dimensions

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“…[15][16][17] Recently, there is a progress in managing phonons by nanostructured phononic crystals (PnCs) [18][19][20][21][22][23] which control heat by making use of phononic properties. It heralds the next technological revolution in phononics, such as thermal rectifiers, [15,[24][25][26][27][28][29] optomechanical crystals, [30,31] thermal cloaking, [32][33][34][35][36] thermoelectrics, [37][38][39][40][41] and thermocrystals. [18,21,22] When the characteristic size of nanostructured PnCs is closed to the wavelength of phonons, PnCs may manipulate the phonon band structures which lead to the phonon confinement.…”

Section: Introductionmentioning

confidence: 99%

Manipulating the temperature dependence of the thermal conductivity of graphene phononic crystal

Yang

et al. 2016

Nanotechnology

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By using non-equilibrium molecular dynamics simulations (NEMD), the modulation on temperature dependence of thermal conductivity of graphene phononic crystals (GPnCs) are investigated. It is found that the temperature dependence of thermal conductivity of GPnCs follows ~ T -α behavior. The power exponents (α) can be efficiently tuned by changing the characteristic size of GPnCs. The phonon participation ratio spectra and dispersion relation reveal that the long-range phonon modes are more affected in GPnCs with larger size of holes (L0). Our results suggest that constructing GPnCs is an effective method to manipulate the temperature dependence of thermal conductivity of graphene, which would be beneficial for developing GPnCs-based thermal management and signal processing devices.

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“…Considering the thermal conductivity of air (10 -2 W m -1 k -1 ) is much smaller than InAs NW (10 0 W m -1 k -1 ), _ Q ac is negligible [13,25,26]. _ Q c is the convective heat loss, which is given by A s h(T 1 -T 2 ), in which A s is the superficial area of NW, 1 \ h\10 is the convective heat transfer coefficient of air [27], T 1 and T 2 are the NW surface temperature and near-surface air temperature, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Diameter-dependent Thermal Conductivity of InAs Nanowires

et al. 2014

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In this work, we synthesized high-quality InAs nanowires by a convenient chemical vapor deposition method, and developed a simple laser heating method to measure the thermal conductivity of a single InAs nanowire in air. During the measurement, a focused laser was used to heat one end of a freely suspended nanowire, with its other end embedded into a carbon conductive adhesive. In order to obtain the thermal conductivity of InAs nanowires, the heat loss in the heat transfer process was estimated, which includes the heat loss through air conduction, the heat convection, and the radiation loss. The absorption ratio of the laser power in the InAs nanowire was calculated. The result shows that the thermal conductivity of InAs nanowires monotonically increases from 6.4 W m -1 K -1 to 10.5 W m -1 K -1 with diameters increasing from 100 nm to 190 nm, which is ascribed to the enhanced phonon-boundary scattering.

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Colloquium: Phononics: Manipulating heat flow with electronic analogs and beyond

Cited by 1,298 publications

References 139 publications

From Thermal Rectifiers to Thermoelectric Devices

From Thermal Rectifiers to Thermoelectric Devices

Manipulating the temperature dependence of the thermal conductivity of graphene phononic crystal

Synthesis and Diameter-dependent Thermal Conductivity of InAs Nanowires

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