Thermomechanical analysis of two-dimensional boron monolayers

Tsafack, Thierry; Yakobson, Boris I.

doi:10.1103/physrevb.93.165434

Cited by 57 publications

(50 citation statements)

References 36 publications

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“…the ballistic thermal transport of δ 6 borophene. [91] The results of phonon thermal conductance agreed well with that from Zhou et al [34] Li et al studied the quantum lattice thermal conductance of C-borophane. [37] Interestingly, the B-H group is isoelectronic with C and its mass is also similar to C. It was found that hydrogenation only slightly decreases the thermal conductance of δ 6 borophene while hydrogenation can obviously reduce the thermal conductance of graphene.…”

Section: Ballistic Thermal Transport Of Borophenesupporting

confidence: 83%

“…Furthermore, the interaction force strength between boron atoms in the armchair direction is about 30 times of that in the zigzag direction, showing stronger thermal transport anisotropy than other 2D materials. Tasfack and Yakobson also studied the ballistic thermal transport of δ 6 borophene . The results of phonon thermal conductance agreed well with that from Zhou et al…”

Section: Thermal Transport Of Borophenesupporting

confidence: 79%

“…Tsafack and Yakobson also calculated the ballistic thermal transport of several borophene sheets, such as δ 6 , δ 5 , α, and χ 3 phases. [91] The phonon thermal conductance and electron thermal conductance of δ 6 and χ 3 borophene are anisotropic while those of δ 5 and α borophene were isotropic at high temperature, which is derived from the vacancy arrangement along different directions. The phonon thermal conductances of α, δ 5 , and χ 3 borophene sheets were significantly lower than that of graphene and the electron thermal conductance of all borophene sheets were obviously higher than that of graphene.…”

Section: Ballistic Thermal Transport Of Borophenementioning

confidence: 96%

“…This is the highest thermal conductance among all reported 2D materials. Tsafack and Yakobson also calculated the ballistic thermal transport of several borophene sheets, such as δ 6 , δ 5 , α, and χ 3 phases . The phonon thermal conductance and electron thermal conductance of δ 6 and χ 3 borophene are anisotropic while those of δ 5 and α borophene were isotropic at high temperature, which is derived from the vacancy arrangement along different directions.…”

Section: Thermal Transport Of Borophenementioning

confidence: 99%

See 3 more Smart Citations

2D Boron Sheets: Structure, Growth, and Electronic and Thermal Transport Properties

Gao

Cheng

et al. 2019

Adv Funct Materials

144

101

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The structures of boron clusters, such as flat clusters and fullerenes, resemble those of carbon. Various two‐dimensional (2D) borophenes have been proposed since the production of graphene. The recent successful fabrication of borophene sheets has prompted extensive researches, and some unique properties are revealed. In this review, the recent theoretical and experimental progress on the structure, growth, and electronic and thermal transport properties of borophene sheets is summarized. The history of prediction of boron sheet structures is introduced. Existing with a mixture of triangle lattice and hexagonal lattice, the structures of boron sheets have peculiar characteristics of polymorphism and show significant dependence on the substrate. Due to the unique structure and complex BB bonds, borophene sheets have many interesting electronic and thermal transport properties, such as strong nonlinear effect, strong thermal transport anisotropy, high thermal conductance in the ballistic transport and low thermal conductivity in the diffusive transport. The growth mechanism and synthesis of borophene sheets on different metal substrates are also presented. The successful prediction and synthesis will shed light on the exploration of new novel materials. Besides, the outstanding and peculiar properties of borophene make them tempting platform for exploring novel physical phenomena and extensive applications.

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Section: Ballistic Thermal Transport Of Borophenesupporting

confidence: 83%

Section: Thermal Transport Of Borophenesupporting

confidence: 79%

Section: Ballistic Thermal Transport Of Borophenementioning

confidence: 96%

Section: Thermal Transport Of Borophenementioning

confidence: 99%

See 2 more Smart Citations

2D Boron Sheets: Structure, Growth, and Electronic and Thermal Transport Properties

Gao

Cheng

et al. 2019

Adv Funct Materials

144

101

View full text Add to dashboard Cite

show abstract

“…Recently, borophene came into researchers' sight because of its unique position close to carbon and it is the lightest Xenes. The polymorphism and anisotropic structure of borophene lead to many attractive properties, including the optical transparency, metallicity, phonon‐mediated superconductivity, photoluminescence in visible region (≈626 nm), efficient thermal transport, mechanical flexibility, etc. When considering its photothermal application, there is a drawback of weak absorption with extinction coefficient of ≈2.5 L g −1 cm −1 , making the application of photothermal evaporation full of challenge.…”

Section: Photothermal Evaporationmentioning

confidence: 99%

Solar‐Inspired Water Purification Based on Emerging 2D Materials: Status and Challenges

et al. 2020

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Water shortage and the energy crisis are two major global challenges in this century. The solution for water crisis should be based on a sustainable energy source. Solar‐inspired water purification is an efficient and green technology for tackling the water challenge using abundant and clean solar energy through photothermal evaporation‐induced water production, photoinduced antimicrobial treatment, and photocatalytic degradation of organic contaminants. 2D nanomaterials draw significant attention for their use these three water‐purification methods because of their large surface area, broadband and strong absorption in the solar spectral range, and efficient photothermal and photocatalytic transformation. Herein, the recent development of 2D nanomaterials applied in photothermal evaporation, photoinduced antimicrobial treatment, and photocatalytic capability is comprehensively overviewed. Various strategies in enhancing the light‐absorption and light‐conversion efficiency for different 2D nanomaterials are presented. The challenges and perspectives of these 2D nanomaterials are further discussed for practical water purification. This Review highlights these green energy–driven water‐purification methods based on emerging 2D materials.

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Boron Nanosheets for Efficient All‐Optical Modulation and Logic Operation

Guo

Shao

et al. 2019

Advanced Optical Materials

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As the left neighbor of carbon in the periodic table, boron is very similar to carbon in electronic properties and strong bonding characters, and both undertake important roles in living organisms. [8][9][10][11] However, due to the unique trivalent electronic configuration, boron is among the most chemically versatile elements, which shows polymorphism in low-dimensional structures and thus richer properties, such as high-temperature superconductivity, high carrier mobility, massless Dirac fermions, superhardness, to name a few. [12][13][14][15][16][17][18][19][20][21] Although the 2D form borophene has recently been experimentally realized by several groups under ultrahigh-vacuum conditions and by another one with chemical vapor deposition (CVD), [12,15,22,23] the related researches of borophene are still mainly concentrated on theoretical predictions and computational calculations. [13,20,21,[24][25][26][27][28] Experimental work is largely lagged behind, which, to a large extent, is due to its chemical and structural complexities and thus challenging synthesis. [13,14] On the other hand, up to now, most of 2D boron-related researches are on the electronic and mechanical properties by theoretical methods, let alone experimental study of its optical properties and related applications. According to several recent theoretical predictions, 2D boron bears fascinating features that are totally different from other 2D materials, such as thicknessdependent transparency and visible/near-infrared plasmons. [26,27] Here, based on liquid-exfoliated boron nanosheets, for the first time, we demonstrate an all-optical phase shifter at the telecommunication band that is mediated by the efficient photo-thermal response in boron nanosheets. The constructed phase shifter shows an order of magnitude faster response speed and higher modulation efficiency compared with other 2D material-based similar devices. Consequently, a high-efficiency and stable allfiber, all-optical modulator was successfully realized based on a Mach-Zehnder interferometer (MZI) configuration, which could be further employed for all-optical logic gating operations. As proof-of-concept demonstrations, we successfully achieved all-optical logic AND and NOT gates by exploiting the superior photo-thermal response in boron nanosheets. Our work marks an important step toward exploring the optical and photonic applications of 2D boron nanosheets.Due to its unique trivalent electronic configuration, boron features richer properties as well as higher chemical and structural complexities compared with its right neighbor carbon. Consequently, over a decade later than the exfoliation of graphene, borophene has just been experimentally demonstrated on certain metal substrates and under ultrahigh-vacuum conditions, which, however, limit its wide and in-depth experimental researches. Here, for the first time, by employing liquid-exfoliated boron nanosheets, all-optical signal processing application is explored based on its superior photo-thermal response. A stable all-opt...

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Thermomechanical analysis of two-dimensional boron monolayers

Cited by 57 publications

References 36 publications

2D Boron Sheets: Structure, Growth, and Electronic and Thermal Transport Properties

2D Boron Sheets: Structure, Growth, and Electronic and Thermal Transport Properties

Solar‐Inspired Water Purification Based on Emerging 2D Materials: Status and Challenges

Boron Nanosheets for Efficient All‐Optical Modulation and Logic Operation

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