scholarly journals Emerging Topochemical Strategies for Designing Two-Dimensional Energy Materials

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 867
Author(s):  
Na Liu ◽  
Libo Chang ◽  
Jiang Wu ◽  
Jianhua Fang ◽  
Xu Xiao
Keyword(s):  
Material Properties ◽  
High Efficiency ◽  
2D Materials ◽  
Synthetic Methods ◽  
Future Research ◽  
Acid Etching ◽  
Synthesis Methods ◽  
Two Dimensional ◽  
Energy Materials ◽  
The Relationship

The unique properties of two-dimensional (2D) materials make them increasingly attractive in various fields, especially for energy harvesting, conversion, or storage. Simultaneously, numerous synthetic methods have been rapidly developed. Recently, topochemical strategies were demonstrated, and they show tremendous promising potential for synthesizing 2D materials due to their simplicity, scalability, and high efficiency. Considering the suitability of material structures and their synthesis methods, as well as the relationship between material properties and applications, it is necessary for researchers to comprehensively review and determine the prospects of 2D materials based on topological chemical synthesis methods and their related applications. Therefore, in this review, we systematically summarize and analyze the representative topochemical strategies for synthesizing 2D materials, including salt-templating methods for non-layered 2D materials, molten Lewis acid etching strategy for novel MXenes, and the chalcogen vapors etching and substituting strategy for phase-controlled 2D materials and so on, with the application of these 2D materials in energy-related fields including batteries, supercapacitors, and electrocatalysis. At the end of the paper, the corresponding perspective was also illustrated, and we expect that this could provide a reference for the future research in the field.

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

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2315-2340 ◽  
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.

scholarly journals Emerging Artificial Two-Dimensional van der Waals Heterostructures for Optoelectronics

2020 ◽  
Author(s):  
Hongcheng Ruan ◽  
Yu Huang ◽  
Yuqian Chen ◽  
Fuwei Zhuge
Keyword(s):  
Material Properties ◽  
2D Materials ◽  
Van Der Waals ◽  
Optoelectronic Devices ◽  
Vertical Direction ◽  
Two Dimensional ◽  
Device Application ◽  
Optical Memories ◽  
Optoelectronic Applications ◽  
Transfer Method

Two-dimensional (2D) materials are attracting explosive attention for their intriguing potential in versatile applications, covering optoelectronics, electronics, sensors, etc. An attractive merit of 2D materials is their viable van der Waals (VdW) stacking in artificial sequence, thus forming different atomic arrangements in vertical direction and enabling unprecedented tailoring of material properties and device application. In this chapter, we summarize the latest progress in assembling VdW heterostructures for optoelectronic applications by beginning with the basic pick-transfer method for assembling 2D materials and then discussing the different combination of 2D materials of semiconductor, conductor, and insulator properties for various optoelectronic devices, e.g., photodiode, phototransistors, optical memories, etc.

β-SnS/GaSe heterostructure: a promising solar-driven photocatalyst with low carrier recombination for overall water splitting

2022 ◽  
Author(s):  
Jie Meng ◽  
Jiajun Wang ◽  
Jianing Wang ◽  
Qunxiang Li ◽  
Jinlong Yang
Keyword(s):  
Water Splitting ◽  
High Efficiency ◽  
2D Materials ◽  
Two Dimensional ◽  
Practical Application ◽  
Overall Water Splitting ◽  
Carrier Recombination ◽  
High Carrier

Various two-dimensional (2D) materials have been well investigated as promising high-efficiency photocatalysts for solar-driven water splitting, while the high carrier recombination greatly hinders their practical application. One effective route to...

scholarly journals Two-Dimensional Tellurium: Progress, Challenges, and Prospects

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhe Shi ◽  
Rui Cao ◽  
Karim Khan ◽  
Ayesha Khan Tareen ◽  
Xiaosong Liu ◽  
...  
Keyword(s):  
Field Effect Transistors ◽  
2D Materials ◽  
Environmental Stability ◽  
Synthesis Methods ◽  
Two Dimensional ◽  
High Carrier Mobility ◽  
High Carrier ◽  
Energy Harvesting Devices ◽  
Further Development ◽  
Piezoelectric Devices

AbstractSince the successful fabrication of two-dimensional (2D) tellurium (Te) in 2017, its fascinating properties including a thickness dependence bandgap, environmental stability, piezoelectric effect, high carrier mobility, and photoresponse among others show great potential for various applications. These include photodetectors, field-effect transistors, piezoelectric devices, modulators, and energy harvesting devices. However, as a new member of the 2D material family, much less known is about 2D Te compared to other 2D materials. Motivated by this lack of knowledge, we review the recent progress of research into 2D Te nanoflakes. Firstly, we introduce the background and motivation of this review. Then, the crystal structures and synthesis methods are presented, followed by an introduction to their physical properties and applications. Finally, the challenges and further development directions are summarized. We believe that milestone investigations of 2D Te nanoflakes will emerge soon, which will bring about great industrial revelations in 2D materials-based nanodevice commercialization.

scholarly journals Spintronics in Two-Dimensional Materials

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Yanping Liu ◽  
Cheng Zeng ◽  
Jiahong Zhong ◽  
Junnan Ding ◽  
Zhiming M. Wang ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
High Efficiency ◽  
2D Materials ◽  
Spin Injection ◽  
Transition Metal Dichalcogenides ◽  
Information Storage ◽  
Oxide Semiconductor ◽  
Two Dimensional ◽  
Spintronic Devices ◽  
Metal Dichalcogenides

AbstractSpintronics, exploiting the spin degree of electrons as the information vector, is an attractive field for implementing the beyond Complemetary metal-oxide-semiconductor (CMOS) devices. Recently, two-dimensional (2D) materials have been drawing tremendous attention in spintronics owing to their distinctive spin-dependent properties, such as the ultra-long spin relaxation time of graphene and the spin–valley locking of transition metal dichalcogenides. Moreover, the related heterostructures provide an unprecedented probability of combining the different characteristics via proximity effect, which could remedy the limitation of individual 2D materials. Hence, the proximity engineering has been growing extremely fast and has made significant achievements in the spin injection and manipulation. Nevertheless, there are still challenges toward practical application; for example, the mechanism of spin relaxation in 2D materials is unclear, and the high-efficiency spin gating is not yet achieved. In this review, we focus on 2D materials and related heterostructures to systematically summarize the progress of the spin injection, transport, manipulation, and application for information storage and processing. We also highlight the current challenges and future perspectives on the studies of spintronic devices based on 2D materials.

scholarly journals Hybrid silicon photonic devices with two-dimensional materials

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2295-2314 ◽  
Author(s):  
Jiang Li ◽  
Chaoyue Liu ◽  
Haitao Chen ◽  
Jingshu Guo ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
High Speed ◽  
High Efficiency ◽  
2D Materials ◽  
Optical Computing ◽  
Photonic Devices ◽  
Two Dimensional ◽  
Optical Modulators ◽  
Silicon Photonic ◽  
Hybrid Silicon

AbstractSilicon photonics is becoming more and more attractive in the applications of optical interconnections, optical computing, and optical sensing. Although various silicon photonic devices have been developed rapidly, it is still not easy to realize active photonic devices and circuits with silicon alone due to the intrinsic limitations of silicon. In recent years, two-dimensional (2D) materials have attracted extensive attentions due to their unique properties in electronics and photonics. 2D materials can be easily transferred onto silicon and thus provide a promising approach for realizing active photonic devices on silicon. In this paper, we give a review on recent progresses towards hybrid silicon photonics devices with 2D materials, including two parts. One is silicon-based photodetectors with 2D materials for the wavelength-bands from ultraviolet (UV) to mid-infrared (MIR). The other is silicon photonic switches/modulators with 2D materials, including high-speed electro-optical modulators, high-efficiency thermal-optical switches and low-threshold all-optical modulators, etc. These hybrid silicon photonic devices with 2D materials devices provide an alternative way for the realization of multifunctional silicon photonic integrated circuits in the future.

scholarly journals 2D MXenes as Co-catalysts in Photocatalysis: Synthetic Methods

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuliang Sun ◽  
Xing Meng ◽  
Yohan Dall’Agnese ◽  
Chunxiang Dall’Agnese ◽  
Shengnan Duan ◽  
...  
Keyword(s):  
Self Assembly ◽  
Large Family ◽  
Synthetic Methods ◽  
Future Research ◽  
Synthesis Methods ◽  
Mechanical Mixing ◽  
Co Catalyst ◽  
Co Catalysts ◽  
Photogenerated Charge Separation

Abstract Since their seminal discovery in 2011, two-dimensional (2D) transition metal carbides/nitrides known as MXenes, that constitute a large family of 2D materials, have been targeted toward various applications due to their outstanding electronic properties. MXenes functioning as co-catalyst in combination with certain photocatalysts have been applied in photocatalytic systems to enhance photogenerated charge separation, suppress rapid charge recombination, and convert solar energy into chemical energy or use it in the degradation of organic compounds. The photocatalytic performance greatly depends on the composition and morphology of the photocatalyst, which, in turn, are determined by the method of preparation used. Here, we review the four different synthesis methods (mechanical mixing, self-assembly, in situ decoration, and oxidation) reported for MXenes in view of their application as co-catalyst in photocatalysis. In addition, the working mechanism for MXenes application in photocatalysis is discussed and an outlook for future research is also provided.

scholarly journals New Developments in Material Preparation Using a Combination of Ionic Liquids and Microwave Irradiation

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 647 ◽  
Author(s):  
Yannan Wang ◽  
Qidong Hou ◽  
Meiting Ju ◽  
Weizun Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microwave Irradiation ◽  
High Efficiency ◽  
Materials Science ◽  
Synthetic Methods ◽  
Materials Preparations ◽  
Future Research ◽  
Heating Source ◽  
Microwave Assisted

During recent years, synthetic methods combining microwaves and ionic liquids became accepted as a promising methodology for various materials preparations because of their high efficiency and low energy consumption. Ionic liquids with high polarity are heated rapidly, volumetrically and simultaneously under microwave irradiation. Hence, combination of microwave irradiation as a heating source with ionic liquids with various roles (e.g., solvent, additive, template or reactant) opened a completely new technique in the last twenty years for nanomaterials and polymers preparation for applications in various materials science fields including polymer science. This review summarizes recent developments of some common materials syntheses using microwave-assisted ionic liquid method with a focus on inorganic nanomaterials, polymers, carbon-derived composites and biomass-based composites. After that, the mechanisms involved in microwave-assisted ionic-liquid (MAIL) are discussed briefly. This review also highlights the role of ionic liquids in the reaction and crucial issues that should be addressed in future research involving this synthesis technique.

scholarly journals Microfluidics for Two-Dimensional Nanosheets: A Mini Review

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1067
Author(s):  
Chang-Ho Choi ◽  
Yeongwon Kwak ◽  
Rajiv Malhotra ◽  
Chih-Hung Chang
Keyword(s):  
2D Materials ◽  
High Yield ◽  
Process Time ◽  
Future Research ◽  
Two Dimensional ◽  
Practical Applications ◽  
Yield Production ◽  
Common Technique ◽  
Exciting Area ◽  
2D Nanosheets

Since the discovery of graphene, there has been increasing interest in two-dimensional (2D) materials. To realize practical applications of 2D materials, it is essential to isolate mono- or few-layered 2D nanosheets from unexfoliated counterparts. Liquid phase exfoliation (LPE) is the most common technique to produce atomically thin-layered 2D nanosheets. However, low production yield and prolonged process time remain key challenges. Recently, novel exfoliation processes based on microfluidics have been developed to achieve rapid and high yield production of few-layer 2D nanosheets. We review the primary types of microfluidic-based exfoliation techniques in terms of the underlying process mechanisms and the applications of the 2D nanosheets thus produced. The key challenges and future directions are discussed in the above context to delineate future research directions in this exciting area of materials processing.

scholarly journals Improved Charge Injection and Transport of Light-Emitting Diodes Based on Two-Dimensional Materials

2019 ◽  
Vol 9 (19) ◽  
pp. 4140 ◽  
Author(s):  
Yuanming Zhou ◽  
Sijiong Mei ◽  
Dongwei Sun ◽  
Neng Liu ◽  
Fei Mei ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Chemical Properties ◽  
Two Dimensional ◽  
Effective Electron ◽  
Light Emitting ◽  
Two Dimensional Materials ◽  
Materials Used

Light-emitting diodes (LEDs) are considered to be the most promising energy-saving technology for future lighting and display. Two-dimensional (2D) materials, a class of materials comprised of monolayer or few layers of atoms (or unit cells), have attracted much attention in recent years, due to their unique physical and chemical properties. Here, we summarize the recent advances on the applications of 2D materials for improving the performance of LEDs, including organic light emitting diodes (OLEDs), quantum dot light emitting diodes (QLEDs) and perovskite light emitting diodes (PeLEDs), using organic films, quantum dots and perovskite films as emission layers (EMLs), respectively. Two dimensional materials, including graphene and its derivatives and transition metal dichalcogenides (TMDs), can be employed as interlayers and dopant in composite functional layers for high-efficiency LEDs, suggesting the extensive application in LEDs. The functions of 2D materials used in LEDs include the improved work function, effective electron blocking, suppressed exciton quenching and reduced surface roughness. The potential application of 2D materials in PeLEDs is also presented and analyzed.

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