Two-Dimensional Boron Sheets

2016 ◽  
pp. 19-47
Author(s):  
Sohrab Ismail-Beigi
Keyword(s):  
Two Dimensional ◽  
Boron Sheets

scholarly journals Two-Dimensional Fluorinated Boron Sheets: Mechanical, Electronic, and Thermal Properties

ACS Omega ◽  
2018 ◽  
Vol 3 (2) ◽  
pp. 1815-1822 ◽  
Author(s):  
Rengin Peköz ◽  
Mine Konuk ◽  
M. Emin Kilic ◽  
Engin Durgun
Keyword(s):  
Thermal Properties ◽  
Two Dimensional ◽  
Boron Sheets

scholarly journals Half-Auxeticity and Anisotropic Transport in Pd Decorated Two-Dimensional Boron Sheets

2020 ◽  
Author(s):  
Fengxian Ma ◽  
Yalong Jiao ◽  
Weikang Wu ◽  
Ying Liu ◽  
Shengyuan A. Yang ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Poisson Ratio ◽  
Two Dimensional ◽  
Peculiar Property ◽  
Opposite Behavior ◽  
Boron Sheets ◽  
Anisotropic Transport

If one strains a material along a direction, most materials shrink normal to that direction. Similarly, if you compress the material, it will expand in the direction orthogonal to the pressure. Few materials, those of negative Poisson ratio, show the opposite behavior. Here, we show an unprecedented feature, a material that expands normal to the direction of force regardless if it is strained or compressed. Such behavior, called half-auxeticity, has been found for a borophene sheet stabilized by decorating Pd atoms. Herein, we explore Pd-decorated borophene, identify three stable phases of which one has this peculiar property of half auxeticity. After carefully analyzing stability, mechanical and electronic properties we explore the origin of this very uncommon behavior.<br>

Half-Auxeticity and Anisotropic Transport in Pd Decorated Two-Dimensional Boron Sheets

2020 ◽  
Author(s):  
Fengxian Ma ◽  
Yalong Jiao ◽  
Weikang Wu ◽  
Ying Liu ◽  
Shengyuan A. Yang ◽  
...  
Keyword(s):  
Structural Feature ◽  
Electronic Properties ◽  
Poisson Ratio ◽  
Applied Strain ◽  
Two Dimensional ◽  
Peculiar Property ◽  
Opposite Behavior ◽  
2D Nanomaterials ◽  
Boron Sheets ◽  
Anisotropic Transport

<p>If one strains a material, most materials shrink normal to the direction of applied strain. Similarly, if a material is compressed, it will expand in the direction orthogonal to the pressure. Few materials, those of negative Poisson ratio, show the opposite behavior. Here, we show an unprecedented feature, a material that expands normal to the direction of stress, regardless if it is strained or compressed. Such behavior, namely half-auxeticity, is demonstrated for a borophene sheet stabilized by decorating Pd atoms. We explore Pd-decorated borophene, identify three stable phases of which one has this peculiar property of half auxeticity. After carefully analyzing stability, mechanical and electronic properties we explore the origin of this very uncommon behavior, and identify it as a structural feature that may also be employed to design further 2D nanomaterials.</p><br>

scholarly journals Half-Auxeticity and Anisotropic Transport in Pd Decorated Two-Dimensional Boron Sheets

2021 ◽  
Author(s):  
Fengxian Ma ◽  
Yalong Jiao ◽  
Weikang Wu ◽  
Ying Liu ◽  
Shengyuan A. Yang ◽  
...  
Keyword(s):  
Structural Feature ◽  
Electronic Properties ◽  
Poisson Ratio ◽  
Applied Strain ◽  
Two Dimensional ◽  
Peculiar Property ◽  
Opposite Behavior ◽  
2D Nanomaterials ◽  
Boron Sheets ◽  
Anisotropic Transport

<p></p><p>If one strains a material, most materials shrink normal to the direction of applied strain. Similarly, if a material is compressed, it will expand in the direction orthogonal to the pressure. Few materials, those of negative Poisson ratio, show the opposite behavior. Here, we show an unprecedented feature, a material that expands normal to the direction of stress, regardless if it is strained or compressed. Such behavior, namely, half-auxeticity, is demonstrated for a borophene sheet stabilized by decorating Pd atoms. We explore Pd-decorated borophene, identify three stable phases of which one has this peculiar property of half auxeticity. After carefully analyzing stability, mechanical and electronic properties we explore the origin of this very uncommon behavior and identify it as a structural feature that may also be employed to design further 2D nanomaterials.</p><br><p></p>

Superhard three-dimensional B3N4 with two-dimensional metallicity

2017 ◽  
Vol 5 (24) ◽  
pp. 5897-5901 ◽  
Author(s):  
Chenlong Xie ◽  
Mengdong Ma ◽  
Chao Liu ◽  
Yilong Pan ◽  
Mei Xiong ◽  
...  
Keyword(s):  
High Pressure ◽  
First Principles ◽  
Ambient Pressure ◽  
Three Dimensional ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Metallic Conduction ◽  
Boron Sheets

Using first-principles calculations, we uncovered that t-B3N4 is metastable at ambient pressure, but becomes stable under high pressure. The metallic conduction of t-B3N4 is interrupted by the insulated boron sheets stacked along the c axis, giving rise to its 2D metallicity.

scholarly journals Proton Migration on the Boron Sheets Surface

2021 ◽  
pp. 19-28
Author(s):  
Evgeniya Boroznina ◽  
◽  
Konstantin Smirnov ◽  
Vladimir Akatiev ◽  
Marina Kudinova ◽  
...  
Keyword(s):  
Band Gap ◽  
Two Dimensional ◽  
Electronic Density ◽  
New Class ◽  
Single Proton ◽  
Mechanical And Electrical Properties ◽  
Type Layer ◽  
Boron Sheets ◽  
Proton Migration ◽  
Boron Nanostructures

Borophene is a two-dimensional allotrope of boron and it is also known as boron sheet. First it has been predicted theoretically in the mid-1990s, experimentally borophene was confirmed in 2015 when the structure was successfully synthesized in 2015. One of the key features of borophene is its strong anisotropy – the dependence of mechanical and electrical properties on direction. This phenomenon is not typical for 2D materials and has never been observed in 2D metals before. Borophene has the highest tensile strength of all known two-dimensional materials. In early works, it was found that the adsorption of a hydrogen atom on the surface of borophene is possible and the analyses of electronic density showed that atom H became a proton. Therefore, in this work, the authors have studied the proton migration over the surface of boron sheets of two types and have found the most energetically favorable path of proton motion. The electron-energy characteristics of the process of migration of a single proton along the surface of boron layers of two types are determined and it is established that in all the considered cases the proton is able to move along the surface almost barrier-free. The type of conductivity of pure boron layers and layers modified by a single proton is determined. In the A-type boron layer, the proton increases the band gap by 0.04 eV, and in the B-type layer, the band gap changes by 0.05 eV. It is proved that two-dimensional boron nanostructures can be considered as a new class of boron topological structure with proton conductivity.

scholarly journals Half-Auxeticity and Anisotropic Transport in Pd Decorated Two-Dimensional Boron Sheets

2020 ◽  
Author(s):  
Fengxian Ma ◽  
Yalong Jiao ◽  
Weikang Wu ◽  
Ying Liu ◽  
Shengyuan A. Yang ◽  
...  
Keyword(s):  
Structural Feature ◽  
Electronic Properties ◽  
Poisson Ratio ◽  
Applied Strain ◽  
Two Dimensional ◽  
Peculiar Property ◽  
Opposite Behavior ◽  
2D Nanomaterials ◽  
Boron Sheets ◽  
Anisotropic Transport

<p>If one strains a material, most materials shrink normal to the direction of applied strain. Similarly, if a material is compressed, it will expand in the direction orthogonal to the pressure. Few materials, those of negative Poisson ratio, show the opposite behavior. Here, we show an unprecedented feature, a material that expands normal to the direction of stress, regardless if it is strained or compressed. Such behavior, namely half-auxeticity, is demonstrated for a borophene sheet stabilized by decorating Pd atoms. We explore Pd-decorated borophene, identify three stable phases of which one has this peculiar property of half auxeticity. After carefully analyzing stability, mechanical and electronic properties we explore the origin of this very uncommon behavior, and identify it as a structural feature that may also be employed to design further 2D nanomaterials.</p><br>

Two-Dimensional Boron Sheets as Metal-Free Catalysts for Hydrogen Evolution Reaction

2018 ◽  
Vol 122 (33) ◽  
pp. 19051-19055 ◽  
Author(s):  
Chuangwei Liu ◽  
Zhongxu Dai ◽  
Jie Zhang ◽  
Yonggang Jin ◽  
Dongsheng Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Two Dimensional ◽  
Metal Free ◽  
Boron Sheets

Experimental realization of quasicubic boron sheets

Nanoscale ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 3787-3794 ◽  
Author(s):  
Zenghui Wu ◽  
Guoan Tai ◽  
Wei Shao ◽  
Rui Wang ◽  
Chuang Hou
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Two Dimensional ◽  
Experimental Realization ◽  
Direct Bandgap ◽  
Boron Sheets ◽  
Foil Substrate

Two-dimensional boron sheets with a quasicubic structure have been synthesized on a Ni foil substrate by chemical vapor deposition, and possess a direct bandgap of around 2.4 eV.

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