Surface-engineered nanoscale diamond films enable remarkable enhancement in thermal conductivity and anisotropy

Liu, Xiangjun; Zhang, Gang; Zhang, Yong‐Wei

doi:10.1016/j.carbon.2015.07.061

Cited by 18 publications

(15 citation statements)

References 52 publications

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“…[3][4][5][6][7][8][9] For instance, diamond possesses the highest known lattice thermal conductivity in three-dimensional materials. 10,11 In terms of nanostructures, carbon nanotube has a thermal conductivity higher than 3000 W/Km, 12,13 which is the highest among all the one-dimensional materials. In the family of 2D materials, graphene possesses the highest reported thermal conductivity at room temperature, [14][15][16][17][18] which is 2-3 orders higher than that of other 2D materials, such as MoS 2 [19][20][21][22][23][24][25] and phosphorene.…”

Section: Introductionmentioning

confidence: 99%

“…Although the electronic properties of these carbon allotropes are notably different, for instance, sp 3 diamond is a wide band gap insulator while sp 2 graphene is a semimetal with extraordinarily high electron mobility; all of them have one common characteristic, i.e., the ultra-high thermal conductivity [3][4][5][6][7][8][9] . For instance, diamond possesses the highest known lattice thermal conductivity in three-dimensional materials 10,11 . In terms of nanostructures, carbon nanotube has a thermal conductivity higher than 3000W/Km 12,13 , which is the highest among all the one-dimensional materials.…”

Section: Introductionmentioning

confidence: 99%

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Superior lattice thermal conductance of single-layer borophene

et al. 2017

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By way of the non-equilibrium Green's function simulations and first-principles calculations, we report that borophene, a single layer of boron atoms that was fabricated recently, possesses an extraordinarily high lattice thermal conductance in the ballistic transport regime, which even exceeds graphene. In addition to the obvious reasons of light mass and strong bonding of boron atoms, the superior thermal conductance is mainly rooted in its strong structural anisotropy and unusual phonon transmission. For low-frequency phonons, the phonon transmission within borophene is nearly isotropic, similar to that of graphene. For highfrequency phonons, however, the transmission is one-dimensional, that is, all the phonons travel in one direction, giving rise to its ultra-high thermal conductance. The present study suggests that borophene is promising for applications in efficient heat dissipation and thermal management, and also an ideal material for revealing fundamentals of dimensionality effect on phonon transport in ballistic regime.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superior lattice thermal conductance of single-layer borophene

et al. 2017

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“…From lattice dynamic point of view, the key factor that determines the phonon transport across two connecting materials is the overlapping of phonon PDOS between them. [62,63,[73][74][75] The overlapping/similarity of PDOS two connecting materials can be quantitatively analyzed using cosine similarity measure [74] S = D(ω)D 0 (ω)dω…”

Section: Edge Contact By Covalent Bondsmentioning

confidence: 99%

Thermal properties of transition-metal dichalcogenide

Liu

Zhang

2018

Chinese Phys. B

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Beyond graphene, the layered transition metal dichalcogenides (TMDs) have gained considerable attention due to their unique properties. Herein, we review the lattice dynamic and thermal properties of monolayer TMDs, including their phonon dispersion, relaxation time, mean free path (MFP), and thermal conductivities. In particular, the experimental and theoretical studies reveal that the TMDs have relatively low thermal conductivities due to the short phonon group velocity and MFP, which poses a significant challenge for efficient thermal management of TMDs-based devices. Importantly, recent studies have shown that this issue could be largely addressed by connecting TMDs and other materials (such as metal electrode and graphene) with chemical bonds, and a relatively high interfacial thermal conductance (ITC) could be achieved at the covalent bonded interface. The ITC of MoS 2 /Au interface with chemical edge contact is more than 10 times higher than that with physical side contact. In this article, we review recent advances in the study of TMD-related ITC. The effects of temperature, interfacial vacancy, contact orientation, and phonon modes on the edge-contacted interface are briefly discussed.

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“…With the fast development of nanotechnology, nanostructured diamond has attracted a great deal of research interest due to a combination of several of its fascinating properties, such as high elastic modulus, high strength-to-weight ratio, chemical inertness, electrical insulation and ultrahigh thermal conductivity. 1,2 These properties have led to a wide range of emerging technological applications in the fields of thermal management, 3,4 highly thermal conductive filler in composites, [5][6][7] thermal energy storage, 8 antimicrobial coating, 9 drug delivery 10 and quantum technologies including quantum sensing, quantum communication and quantum computing. 11 Encouraged by the success of graphene, two-dimensional (2D) diamond, also called diamane, has emerged as one of the most attractive nanostructured diamonds.…”

Section: Introductionmentioning

confidence: 99%