Asymmetric 3D Elastic–Plastic Strain‐Modulated Electron Energy Structure in Monolayer Graphene by Laser Shocking

Motlag, Maithilee; Kumar, Prashant; Hu, Kevin Y; Jin, S.; Li, Ji; Shao, Jiayi; Xuan, Yi; Lin, Yen-Hsiang; Walrath, Jenna; Tong, Lei; Huang, Xinyu; Goldman, R. S.; Ye, Lei; Cheng, Gary J.

doi:10.1002/adma.201900597

Cited by 36 publications

(31 citation statements)

References 49 publications

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“…However, few recent experimental results suggest that this potential is practically achievable. Recently, Motla et al 151 has taken a step forward by applying a modulated inhomogeneous local asymmetric elastic-plastic strain to graphene using GPa-level laser shocking to induce tunable bandgaps of up to 2.1 eV (ref. 151 ).…”

Section: Future Perspectivesmentioning

confidence: 99%

“…Recently, Motla et al 151 has taken a step forward by applying a modulated inhomogeneous local asymmetric elastic-plastic strain to graphene using GPa-level laser shocking to induce tunable bandgaps of up to 2.1 eV (ref. 151 ). This high-energy laser shocking provides another approach for the application of large inhomogeneous strain to 2D materials.…”

Section: Future Perspectivesmentioning

confidence: 99%

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Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications

Peng¹,

Chen²,

Fan³

et al. 2020

Light Sci Appl

327

183

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Two-dimensional (2D) transition metal dichalcogenides (TMDCs) and graphene compose a new family of crystalline materials with atomic thicknesses and exotic mechanical, electronic, and optical properties. Due to their inherent exceptional mechanical flexibility and strength, these 2D materials provide an ideal platform for strain engineering, enabling versatile modulation and significant enhancement of their optical properties. For instance, recent theoretical and experimental investigations have demonstrated flexible control over their electronic states via application of external strains, such as uniaxial strain and biaxial strain. Meanwhile, many nondestructive optical measurement methods, typically including absorption, reflectance, photoluminescence, and Raman spectroscopies, can be readily exploited to quantitatively determine strain-engineered optical properties. This review begins with an introduction to the macroscopic theory of crystal elasticity and microscopic effective low-energy Hamiltonians coupled with strain fields, and then summarizes recent advances in strain-induced optical responses of 2D TMDCs and graphene, followed by the strain engineering techniques. It concludes with exciting applications associated with strained 2D materials, discussions on existing open questions, and an outlook on this intriguing emerging field.

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Section: Future Perspectivesmentioning

confidence: 99%

Section: Future Perspectivesmentioning

confidence: 99%

Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications

Peng¹,

Chen²,

Fan³

et al. 2020

Light Sci Appl

327

183

View full text Add to dashboard Cite

show abstract

“…Even though borophene is the most recent superior 2D material with a high potential, numerous challenges need to be overcome for its applications ( Figure ). [ 43 ] The practical realization of free‐standing borophene has been deemed challenging owing to the existing theories that it cannot crystallize without substrate and as the 3D boron crystal is not a van der Waals material. Similar to graphene, borophene can be strain‐engineered to open a bandgap.…”

Section: Summary and Perspectivementioning

confidence: 99%

“…Similar to graphene, borophene can be strain‐engineered to open a bandgap. [ 43 ] For example, graphene nanoribbons have been synthesized and employed for various sensing applications. The sensitivity is usually increased when graphene is in the nanoribbon form owing to the edge states.…”

Section: Summary and Perspectivementioning

confidence: 99%

Borophene: New Sensation in Flatland

et al. 2020

Self Cite

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Borophene, a 2D allotrope of boron and the lightest elemental Dirac material, is the latest very promising 2D material owing to its unique structural and electronic characteristics of the X3 and β12 phases. The high atomic density on ridgelines of the β12 phase of borophene provides a substantial orbital overlap, which leads to an excellent electron density in the conduction level and thus to a highly metallic behavior. These unique structural characteristics and electronic properties of borophene attract significant scientific interest. Herein, approaches for crystal growth/synthesis of these unique nanostructures and their potential technological applications are discussed. Various substrate‐supported ultrahigh‐vacuum growth techniques for borophene, such as molecular beam epitaxy, atomic layer deposition, and chemical vapor deposition, along with their challenges, are also summarized. The sonochemical exfoliation and modified Hummer's technique for the synthesis of free‐standing borophene are also discussed. Solution‐phase exfoliation seems to address the scalability issues and expands the applications of these unique materials to various fields, including renewable energy devices and ultrafast sensors. Furthermore, the electronic, optical, thermal, and elastic properties of borophene are thoroughly discussed and are compared with those of graphene and its “cousins.” Numerous frontline applications are envisaged and an outlook is presented.

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“…However, the large-scale manufacture of metallic structures with high fidelity and high crystallinity represents a substantial challenge. A scalable nanomanufacturing technique-laser shock imprinting-has been developed by exerting inhomogeneous 3D strain field to metallic thin film or nanomembranes, where the laser shock-induced pressure is applied on metal thin layers, 1D nanowires [452,453], 2D nanocrystals [454], on top of a nanomold to generate 3D nanoshaping [455,456]. Laser-shock imprinting (LSI) can be used for mass production of quasi-3D nanostructure [457,458] and nano-pattering [459,460].…”

Section: Laser Direct Processing Of Nanomaterials and Their Heterostrmentioning

confidence: 99%

Overview of Laser Applications in Manufacturing and Materials Processing in Recent Years

Shin

Lei

et al. 2020

Journal of Manufacturing Science and Engineering

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Recent years have witnessed a rapid growth of the laser market. Figure 1 shows the recent revenues of laser sales with about 50% increase in revenue over recent four years , which far exceeds the growth of other industrial sectors. More than one third of this revenue belongs to the category of laser materials processing arena. Undoubtedly, lasers have been playing increasingly important roles in various industrial manufacturing sectors. This article is to capture some of important developments in the rapidly growing areas of laser-based manufacturing and materials processing and also describe important technological issues pertaining to various laser-based manufacturing processes. The topics to be covered in this paper include more popularly used processes in industry such as laser additive manufacturing, laser-assisted machining, laser micromachining, laser forming, laser surface texturing, laser welding, and laser shock peening, although there are several additional areas of laser applications. In each section, a brief overview of the process is provided, followed by critical issues in implementing the process, such as properties, predictive modeling, and process monitoring, and finally some remarks on future issues that can guide researchers and practitioners.

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Asymmetric 3D Elastic–Plastic Strain‐Modulated Electron Energy Structure in Monolayer Graphene by Laser Shocking

Cited by 36 publications

References 49 publications

Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications

Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications

Borophene: New Sensation in Flatland

Overview of Laser Applications in Manufacturing and Materials Processing in Recent Years

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