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The production of high-quality hexagonal boron nitride (h-BN) is essential for the ultimate performance of two-dimensional (2D) materials-based devices, since it is the key 2D encapsulation material. Here, a decisive guideline is reported…

Materials Science · Physics 2022-10-14 Adrian Hemmi , Ari Paavo Seitsonen , Thomas Greber , Huanyao Cun

Monolayer Molybdenum disulfide (MoS2), a two-dimensional crystal with a direct bandgap, is a promising candidate for 2D nanoelectronic devices complementing graphene. There have been recent attempts to produce MoS2 layers via chemical and…

Materials Science · Physics 2011-11-23 Yongjie Zhan , Zheng Liu , Sina Najmaei , Pulickel M. Ajayan , Jun Lou

Transition metal dichalcogenides (TMDCs), together with other two-dimensional (2D) materials have attracted great interest due to the unique optical and electrical properties of atomically thin layers. In order to fulfill their potential,…

Two-dimensional (2D) layered tungsten diselenides (WSe2) material has recently drawn a lot of attention due to its unique optoelectronic properties and ambipolar transport behavior. However, direct chemical vapor deposition (CVD) synthesis…

Materials Science · Physics 2014-12-18 Liang Chen , Bilu Liu , Ahmad N. Abbas , Yuqiang Ma , Xin Fang , Yihang Liu , Chongwu Zhou

Hydrogen is a key player in global strategies to reduce greenhouse gas emissions. In order to make hydrogen a widely-used fuel, we require more efficient methods of storing it than the current standard of pressurized cylinders. An…

Materials Science · Physics 2025-01-14 Yasmine S. Al-Hamdani , Andrea Zen , Angelos Michaelides , Dario Alfè

Liquid phase exfoliation is a commonly used method to produce 2D nanosheets from a range of layered crystals. However, such nanosheets display broad size and thickness distributions and correlations between area and thickness, issues that…

The corrosion of metallic surfaces poses significant challenges across industries such as petroleum, energy, and biomedical sectors, leading to structural degradation, safety risks, and substantial maintenance costs. Traditional organic and…

Liquid-phase exfoliation of two-dimensional materials is very attractive for large-scale applications. Although used extensively, isolating MoS2 layers (<10) with high efficiency is reported to be extremely difficult. Further, the…

Moir\'e superlattice in two-dimensional (2D) materials provides a powerful platform to engineer emergent electronic states, yet the construction of moir\'e superlattices remains lab-scale, involving much trial and error and with little…

The exfoliation energy - quantifying the energy required to extract a two-dimensional (2D) sheet from the surface of a bulk material - is a key parameter determining the synthesizability of 2D compounds. Here, using ab initio calculations,…

Materials Science · Physics 2023-02-21 Tom Barnowsky , Arkady V. Krasheninnikov , Rico Friedrich

Graphene stands as a promising material with vast potential across energy storage, electronics, etc. Here, we present a novel mechanical approach utilizing ultrasonic high-energy intercalation exfoliation to extract monolayer graphene from…

Materials Science · Physics 2025-01-15 Kaitong Sun , Si Wu , Junchao Xia , Yinghao Zhu , Guanping Xu , Hai-Feng Li

The two-dimensional layer of molybdenum disulfide (MoS2) has recently attracted much interest due to its direct-gap property and potential applications in optoelectronics and energy harvesting. However, the synthetic approach to obtain high…

Modulation doped GaAs-AlGaAs quantum well based structures are usually used to achieve very high mobility 2-dimensional electron (or hole) gases. Usually high mobilities ($>10^{7}{\rm{cm}^{2}\rm{V}^{-1}\rm{s}^{-1}}$) are achieved at high…

Mesoscale and Nanoscale Physics · Physics 2015-06-03 K. Das Gupta , A. F. Croxall , W. Y. Mak , H. E. Beere , C. A. Nicoll , I. Farrer , F. Sfigakis , D. A. Ritchie

The surface of ultra-thin materials plays a crucial role in determining the properties. This is particularly important in two-dimensional (2D) materials where the surface-bulk distinction is no longer present. While mechanical cleaning of…

Materials Science · Physics 2026-04-14 Emine Yegin , Doruk Pehlivanoğlu , T. Serkan Kasırga

Dielectrics are insulating materials used in many different electronic devices and play an important role in all of them. Current advanced electronic devices use dielectric materials with a high dielectric constant and avoid high leakage…

Applied Physics · Physics 2019-05-17 Fei Hui

We develop a strain gradient plasticity formulation for composite materials with spatially varying volume fractions to characterize size effects in functionally graded materials (FGMs). The model is grounded on the mechanism-based strain…

Materials Science · Physics 2018-07-27 Tittu V. Mathew , Sundararajan Natarajan , Emilio Martínez-Pañeda

${\gamma}$-GeSe is a new type of layered bulk material that was recently successfully synthesized. By means of density functional theory first-principles calculations, we systematically studied the physical properties of two-dimensional…

Materials Science · Physics 2023-07-05 Shuyi Shi , Kuan-Rong Hao , Xing-Yu Ma , Qing-Bo Yan , Gang Su

This review summarizes the main advances published over the last 15 years outlining the different methods of grafting, including reactive extruder systems, surface modification, grafting and graft copolymerization of synthetic and natural…

Chemical Physics · Physics 2011-05-09 Zakir M. O. Rzayev

Two-dimensional (2D) transition metal dichalcogenides (TMDCs), exemplified by molybdenum disulfide (MoS2), have shown exceptional potential for data-centred, energy-efficient electronic applications due to their unique electrical,…

We report a deterministic 2D material (2DM) transfer method to assemble any-stacking-order heterostructures incorporating suspended ultra-thin 2D materials, such as single-layer graphene (SLG) and bilayer graphene (BLG). The transfer…

Mesoscale and Nanoscale Physics · Physics 2021-05-18 I. G. Rebollo , F. C. Rodrigues-Machado , W. Wright , G. J. Melin , A. R. Champagne