Spectroscopic investigation of defects in two-dimensional materials

AbstractTwo-dimensional (2D) materials have been extensively studied in recent years due to their unique properties and great potential for applications. Different types of structural defects could present in 2D materials and have strong influence on their properties. Optical spectroscopic techniques, e.g. Raman and photoluminescence (PL) spectroscopy, have been widely used for defect characterization in 2D materials. In this review, we briefly introduce different types of defects and discuss their effects on the mechanical, electrical, optical, thermal, and magnetic properties of 2D materials. Then, we review the recent progress on Raman and PL spectroscopic investigation of defects in 2D materials, i.e. identifying of the nature of defects and also quantifying the numbers of defects. Finally, we highlight perspectives on defect characterization and engineering in 2D materials.

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Recent progress on exploring exceptionally high and anisotropic H+/OH− ion conduction in two-dimensional materials

Chemical Science ◽

10.1039/c7sc04019a ◽

2018 ◽

Vol 9 (1) ◽

pp. 33-43 ◽

Cited By ~ 25

Author(s):

Pengzhan Sun ◽

Renzhi Ma ◽

Takayoshi Sasaki

Keyword(s):

Recent Progress ◽

2D Materials ◽

Two Dimensional ◽

Ion Conduction ◽

Recent Advances ◽

Ion Conductivities ◽

Two Dimensional Materials

An overview of recent advances in measuring and understanding the exceptionally high and anisotropic H+/OH− ion conductivities of representative 2D materials.

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Advanced pillared designs for two-dimensional materials in electrochemical energy storage

Nanoscale Advances ◽

10.1039/d0na00593b ◽

2020 ◽

Vol 2 (12) ◽

pp. 5496-5503

Author(s):

Chong Chen ◽

Nian-Wu Li ◽

Bao Wang ◽

Shuai Yuan ◽

Le Yu

Keyword(s):

Energy Storage ◽

Recent Progress ◽

2D Materials ◽

Specific Capacity ◽

Lithium Ion ◽

Electrochemical Energy Storage ◽

Two Dimensional ◽

Rate Performance ◽

Two Dimensional Materials ◽

Ion Storage

2D materials with pillared designs have shown great enhancement in specific capacity/capacitance and rate performance. In this study, we highlight the recent progress in 2D materials with pillared designs in lithium-ion storage and beyond.

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Memristive devices based on emerging two-dimensional materials beyond graphene

Nanoscale ◽

10.1039/c9nr02886b ◽

2019 ◽

Vol 11 (26) ◽

pp. 12413-12435 ◽

Cited By ~ 30

Author(s):

Lei Zhang ◽

Tian Gong ◽

Huide Wang ◽

Zhinan Guo ◽

Han Zhang

Keyword(s):

Recent Progress ◽

2D Materials ◽

Two Dimensional ◽

Two Dimensional Materials

Review of the most recent progress on memristive devices based on 2D materials beyond graphene.

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Recent progress in the assembly of nanodevices and van der Waals heterostructures by deterministic placement of 2D materials

Chemical Society Reviews ◽

10.1039/c7cs00556c ◽

2018 ◽

Vol 47 (1) ◽

pp. 53-68 ◽

Cited By ~ 187

Author(s):

Riccardo Frisenda ◽

Efrén Navarro-Moratalla ◽

Patricia Gant ◽

David Pérez De Lara ◽

Pablo Jarillo-Herrero ◽

...

Keyword(s):

Recent Progress ◽

2D Materials ◽

Van Der Waals ◽

Layer By Layer ◽

Two Dimensional ◽

Van Der Waals Heterostructures ◽

Two Dimensional Materials

Designer heterostructures can be assembled layer-by-layer with unmatched precision thanks to the recently developed deterministic placement methods to transfer two-dimensional materials.

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Recent advances in mode-locked fiber lasers based on two-dimensional materials

Nanophotonics ◽

10.1515/nanoph-2020-0149 ◽

2020 ◽

Vol 9 (8) ◽

pp. 2315-2340 ◽

Cited By ~ 2

Author(s):

Junli Wang ◽

Xiaoli Wang ◽

Jingjing Lei ◽

Mengyuan Ma ◽

Cong Wang ◽

...

Keyword(s):

Fiber Lasers ◽

2D Materials ◽

Synthesis Methods ◽

Two Dimensional ◽

New Materials ◽

Saturable Absorbers ◽

Operating Wavelength ◽

Recent Advances ◽

Two Dimensional Materials ◽

Diverse Mode

AbstractDue to the unique properties of two-dimensional (2D) materials, much attention has been paid to the exploration and application of 2D materials. In this review, we focus on the application of 2D materials in mode-locked fiber lasers. We summarize the synthesis methods for 2D materials, fiber integration with 2D materials and 2D materials based saturable absorbers. We discuss the performance of the diverse mode-locked fiber lasers in the typical operating wavelength such as 1, 1.5, 2 and 3 μm. Finally, a summary and outlook of the further applications of the new materials in mode-locked fiber lasers are presented.

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Mechanics of free-standing inorganic and molecular 2D materials

Nanoscale ◽

10.1039/d0nr07606f ◽

2021 ◽

Author(s):

Xianghui Zhang ◽

Andre Beyer

Keyword(s):

Recent Progress ◽

Mechanical Characterization ◽

2D Materials ◽

Two Dimensional ◽

Free Standing ◽

Inorganic As

The discovery of graphene has triggered a great interest in inorganic as well as molecular two-dimensional (2D) materials. In this review, we summarize recent progress in the mechanical characterization of...

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A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large-Size Ultrathin Nonlayered Two-Dimensional Materials

Nano-Micro Letters ◽

10.1007/s40820-021-00692-6 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Mei Zhao ◽

Sijie Yang ◽

Kenan Zhang ◽

Lijie Zhang ◽

Ping Chen ◽

...

Keyword(s):

Theoretical Calculations ◽

2D Materials ◽

Direct Synthesis ◽

Two Dimensional ◽

Covalent Bonds ◽

2D Layered Materials ◽

Large Size ◽

Two Dimensional Materials ◽

Microfabrication Technique ◽

Atomic Substitution

AbstractNonlayered two-dimensional (2D) materials have attracted increasing attention, due to novel physical properties, unique surface structure, and high compatibility with microfabrication technique. However, owing to the inherent strong covalent bonds, the direct synthesis of 2D planar structure from nonlayered materials, especially for the realization of large-size ultrathin 2D nonlayered materials, is still a huge challenge. Here, a general atomic substitution conversion strategy is proposed to synthesize large-size, ultrathin nonlayered 2D materials. Taking nonlayered CdS as a typical example, large-size ultrathin nonlayered CdS single-crystalline flakes are successfully achieved via a facile low-temperature chemical sulfurization method, where pre-grown layered CdI2 flakes are employed as the precursor via a simple hot plate assisted vertical vapor deposition method. The size and thickness of CdS flakes can be controlled by the CdI2 precursor. The growth mechanism is ascribed to the chemical substitution reaction from I to S atoms between CdI2 and CdS, which has been evidenced by experiments and theoretical calculations. The atomic substitution conversion strategy demonstrates that the existing 2D layered materials can serve as the precursor for difficult-to-synthesize nonlayered 2D materials, providing a bridge between layered and nonlayered materials, meanwhile realizing the fabrication of large-size ultrathin nonlayered 2D materials.

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Molecular Functionalization of 2D-Materials: From Atomically Planar 2D Architectures to Off-Plane 3D Functional Materials

Journal of Materials Chemistry C ◽

10.1039/d1tc01534f ◽

2021 ◽

Author(s):

Adam Brill ◽

Elad Koren ◽

Graham de Ruiter

Keyword(s):

2D Materials ◽

Functional Materials ◽

Two Dimensional ◽

The Past ◽

Two Dimensional Materials

Atomically thin two-dimensional materials (2DMs) have moved in the past 15 years from a serendipitously isolated single-layered graphene curiosity to a near technological renaissance, where 2DMs such as graphene and...

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