Penta-MS2 (M = Mn, Ni, Cu/Ag and Zn/Cd) monolayers with negative Poisson's ratios and tunable bandgaps as water-splitting photocatalysts

2021 ◽  
Author(s):  
Xiaodong Lv ◽  
Linke Yu ◽  
Fengyu Li ◽  
Jian Gong ◽  
Yong He ◽  
...  
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
High Stability ◽  
2D Materials ◽  
Two Dimensional ◽  
Novel Materials ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Seeking novel materials with specific applications is always an attractive theme in developing two-dimensional (2D) materials. Here 10 2D pentagonal transition metal dichalcogenids are identified with high stability and their promising applications.

A new family of two-dimensional ferroelastic semiconductors with negative Poisson's ratios

Nanoscale ◽  
2020 ◽  
Vol 12 (26) ◽  
pp. 14150-14159
Author(s):  
Jun-Hui Yuan ◽  
Ge-Qi Mao ◽  
Kan-Hao Xue ◽  
Jiafu Wang ◽  
Xiang-Shui Miao
Keyword(s):  
2D Materials ◽  
Two Dimensional ◽  
New Family ◽  
Poisson's Ratios ◽  
Single Material ◽  
Poisson’S Ratios

Two-dimensional (2D) materials with both ferroelasticity and negative Poisson's ratios have attracted intensive interest, but it is very rare to have both ferroelasticity and negative Poisson's ratios in a single material.

Combined Healing and Doping of Transition Metal Dichalcogenides Through Molecular Functionalization

2021 ◽  
Author(s):  
Sai Manoj Gali ◽  
David Beljonne
Keyword(s):  
Transition Metal ◽  
Charge Transport ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Metal Dichalcogenides

Transition Metal Dichalcogenides (TMDCs) are emerging as promising two-dimensional (2D) materials. Yet, TMDCs are prone to inherent defects such as chalcogen vacancies, which are detrimental to charge transport. Passivation of...

scholarly journals Giant negative Poisson’s ratio in two-dimensional V-shaped materials

2021 ◽  
Author(s):  
Xikui Ma ◽  
Jian Liu ◽  
Yingcai Fan ◽  
Weifeng Li ◽  
Jifan Hu ◽  
...  
Keyword(s):  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Two Dimensional ◽  
Auxetic Materials ◽  
Negative Poisson's Ratio ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Two-dimensional (2D) auxetic materials with exceptional negative Poisson’s ratios (NPR) are drawing increasing interest due to the potentials in medicine, fasteners, tougher composites and many other applications. Improving the auxetic...

scholarly journals Waterproof molecular monolayers stabilize 2D materials

2019 ◽  
Vol 116 (42) ◽  
pp. 20844-20849 ◽  
Author(s):  
Cong Su ◽  
Zongyou Yin ◽  
Qing-Bo Yan ◽  
Zegao Wang ◽  
Hongtao Lin ◽  
...  
Keyword(s):  
Transition Metal ◽  
Theoretical Analysis ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Water Molecules ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Molecular Monolayers ◽  
Metal Dichalcogenides ◽  
Van Der Waals Materials

Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-CmH2m+1NH2, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS2, 1T′-MoTe2, WTe2, WSe2, TaS2, and NbSe2). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP’s lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H2 annealing, and organic solvents, but can be removed by certain organic acids.

Tailorable multifunctionalities in ultrathin 2D Bi-based layered supercell structures

Nanoscale ◽  
2021 ◽  
Author(s):  
Zihao He ◽  
Xingyao Gao ◽  
Di Zhang ◽  
Ping Lu ◽  
Xuejing Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Ferromagnetic Behavior ◽  
Two Dimensional ◽  
Next Generation ◽  
Layered Oxide ◽  
Nanoelectronic Devices ◽  
Potential Applications ◽  
Metal Dichalcogenides

Two-dimensional (2D) materials with robust ferromagnetic behavior have attracted great interest because of their potential applications in next-generation nanoelectronic devices. Aside from graphene and transition metal dichalcogenides, Bi-based layered oxide...

scholarly journals Auxetic two-dimensional transition metal selenides and halides

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Jinbo Pan ◽  
Yan-Fang Zhang ◽  
Jingda Zhang ◽  
Huta Banjade ◽  
Jie Yu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Poisson’S Ratio ◽  
2D Materials ◽  
Uniaxial Stress ◽  
Poisson's Ratio ◽  
Two Dimensional ◽  
Future Design ◽  
Metal Metal ◽  
Multiple Materials ◽  
Metal Selenides

Abstract Auxetic two-dimensional (2D) materials provide a promising platform for biomedicine, sensors, and many other applications at the nanoscale. In this work, utilizing a hypothesis-based data-driven approache, we identify multiple materials with remarkable in-plane auxetic behavior in a family of buckled monolayer 2D materials. These materials are transition metal selenides and transition metal halides with the stoichiometry MX (M = V, Cr, Mn, Fe, Co, Cu, Zn, Ag, and X = Se, Cl, Br, I). First-principles calculations reveal that the desirable auxetic behavior of these 2D compounds originates from the interplay between the buckled 2D structure and the weak metal–metal interaction determined by their electronic structures. We observe that the Poisson’s ratio is sensitive to magnetic order and the amount of uniaxial stress applied. A transition from positive Poisson’s ratio (PPR) to negative Poisson’s ratio (NPR) for a subgroup of MX compounds under large uniaxial stress is predicted. The work provides a guideline for the future design of 2D auxetic materials at the nanoscale.

Low temperature solution synthesis of reduced two dimensional Ti3C2 MXenes with paramagnetic behaviour

Nanoscale ◽  
2018 ◽  
Vol 10 (47) ◽  
pp. 22429-22438 ◽  
Author(s):  
Yeoheung Yoon ◽  
Thi Anh Le ◽  
Anand P. Tiwari ◽  
Ikjoon Kim ◽  
Michel W. Barsoum ◽  
...  
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
2D Materials ◽  
Two Dimensional ◽  
Solution Synthesis ◽  
Early Transition Metal ◽  
Temperature Solution ◽  
Paramagnetic Behaviour ◽  
Early Transition

MXenes – two dimensional, 2D, early transition metal, M, carbides and nitrides, X – are the latest addition to the 2D materials’ world.

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