Graphene thermal flux transistor

Shafranjuk, Serhii

doi:10.1039/c6nr07246a

Cited by 10 publications

(5 citation statements)

References 86 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are two main approaches to low-dimensional nanoscale thermal engineering: phononics engineering [15] and hot carrier manipulation. In the field of graphene phononics, ideas such as gate tunability cooling [14] and defect engineering have been investigated [16,17]. Complementary to that, our work explores the mechanism of hot carrier resonant cooling by localized defects.…”

mentioning

confidence: 95%

Resonant electron-lattice cooling in graphene

et al. 2018

View full text Add to dashboard Cite

Controlling energy flows in solids through switchable electron-lattice cooling can grant access to a range of interesting and potentially useful energy transport phenomena. Here we discuss a tunable electron-lattice cooling mechanism arising in graphene due to phonon emission mediated by resonant scattering on defects in a crystal lattice, which displays an interesting analogy to the Purcell effect in optics. In that, the electron-phonon cooling rate is enhanced due to hot carrier trapping at resonant defects. Resonant dependence of this process on carrier energy translates into gate-tunable cooling rates, exhibiting strong enhancement of cooling that occurs when the carrier energy is aligned with the electron resonance of the defect.

show abstract

mentioning

confidence: 95%

Resonant electron-lattice cooling in graphene

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Negative differential thermal conductivity is needed to have thermal transistors (see also [45]). Thermal transistors are a very active topic nowadays, with a variety of physical realizations [130][131][132][133][134][135][136][137].…”

Section: Negative Differential Thermal Conductivity Thermal Transistorsmentioning

confidence: 99%

Non-Equilibrium Thermodynamics of Heat Transport in Superlattices, Graded Systems, and Thermal Metamaterials with Defects

Jou

Restuccia

2023

Entropy

View full text Add to dashboard Cite

In this review, we discuss a nonequilibrium thermodynamic theory for heat transport in superlattices, graded systems, and thermal metamaterials with defects. The aim is to provide researchers in nonequilibrium thermodynamics as well as material scientists with a framework to consider in a systematic way several nonequilibrium questions about current developments, which are fostering new aims in heat transport, and the techniques for achieving them, for instance, defect engineering, dislocation engineering, stress engineering, phonon engineering, and nanoengineering. We also suggest some new applications in the particular case of mobile defects.

show abstract

“…Unfortunately, such a 2D carbon nanostructure is an undesirable thermoelectric material (ZT B 0.05 at room temperature), 12 mainly due to its extremely high thermal conductance (over 3000 W mK À1 for suspended samples at room temperature). [13][14][15][16] To overcome this drawback, various technologies have been proposed to reduce the thermal conductance and enhance the thermoelectric performance of graphene, including defect engineering, [17][18][19][20][21][22] isotopic doping, 23,24 and introduction of periodic sub-lattice structures. [25][26][27][28][29] These strategies provide a feasible way to enhance the thermoelectric properties of graphene and promote the study of other carbon-based nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the thermoelectric performance of gamma-graphyne nanoribbons by introducing edge disorder

Cui

Ouyang

et al. 2018

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Structure disorder especially edge disorder is unavoidable during the fabrication of nanomaterials. In this paper, using the non-equilibrium Green's function method, we investigate the influence of edge disorder on the thermoelectric performance of gamma(γ)-graphyne nanoribbons (GYNRs). Our results show that the high Seebeck coefficient in pristine γ-GYNR could still be preserved although edge disorder is introduced into the structure. Meanwhile, in these edge-disordered nanoribbons the suppression of thermal conductance including electronic and phononic contributions outweighs the reduction of electronic conductance. These two positive effects combine together, and finally boost the thermoelectric conversion efficiency of γ-GYNRs. The thermoelectric figure of merit ZT in the edge-disordered γ-GYNRs (the length and width are about 55.68 and 1.41 nm) could approach 2.5 at room temperature, and can even reach as high as 4.0 at 700 K, which is comparable to the efficiency of conventional energy conversion methods. The findings in this paper indicate that the edge-disordered γ-GYNRs are a promising candidate for efficient thermoelectric energy conversion and thermal management of nanodevices.

show abstract

Graphene thermal flux transistor

Cited by 10 publications

References 86 publications

Resonant electron-lattice cooling in graphene

Resonant electron-lattice cooling in graphene

Non-Equilibrium Thermodynamics of Heat Transport in Superlattices, Graded Systems, and Thermal Metamaterials with Defects

Enhancing the thermoelectric performance of gamma-graphyne nanoribbons by introducing edge disorder

Contact Info

Product

Resources

About