Field emission applications of graphene analogous two dimensional materials: Recent developments and future perspectives

2021 ◽  
Author(s):  
Abhinandan Patra ◽  
Mahendra A More ◽  
Dattatray J Late ◽  
Chandra Sekhar Rout
Keyword(s):  
Field Emission ◽  
2D Materials ◽  
Layered Materials ◽  
Two Dimensional ◽  
Future Perspectives ◽  
2D Layered Materials ◽  
Two Dimensional Materials ◽  
Recent Developments ◽  
Technology Industries ◽  
Device Technology

2D layered materials are widely regarded as the revolutionary class of materials and hold great promises in the modern device technology industries. 2D materials family covers almost the entire spectrum...

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

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.

Nanofluidics in two-dimensional layered materials: inspirations from nature

2017 ◽  
Vol 46 (17) ◽  
pp. 5400-5424 ◽  
Author(s):  
Jun Gao ◽  
Yaping Feng ◽  
Wei Guo ◽  
Lei Jiang
Keyword(s):  
Recent Progress ◽  
Layered Materials ◽  
Two Dimensional ◽  
Future Perspectives ◽  
2D Layered Materials ◽  
Design And Application

This review highlights the recent progress, current challenges, and future perspectives in the design and application of 2D layered materials for nanofluidic research, with emphasis on the thought of bio-inspiration.

scholarly journals Hybrid van der Waals heterojunction based on two-dimensional materials

2021 ◽  
Vol 2109 (1) ◽  
pp. 012012
Author(s):  
Cuicui Sun ◽  
Meili Qi
Keyword(s):  
2D Materials ◽  
Van Der Waals ◽  
Research Progress ◽  
Material Research ◽  
Two Dimensional ◽  
Covalent Bonds ◽  
2D Layered Materials ◽  
Two Dimensional Materials ◽  
Non Covalent Interactions ◽  
Heterostructure Devices

Abstract Since the discovery of graphene, two-dimensional (2D) layered materials have always been the focus of material research. The layers of 2D materials are covalent bonds, and the layers are weakly bonded to adjacent layers through van der Waals (vdW) interactions. Since any dangling-bond-free surface could be combined with another material through vdW forces, the concept can be extended. This can refer to the integration of 2D materials with any other non-2D materials through non-covalent interactions. The emerging mixed-dimensional (2D+nD, where n is 0, 1 or 3) heterostructure devices has been studied and represents a wider range of vdW heterostructures. New electronic devices and optoelectronic devices based on such heterojunctions have unique functions. Therefore, this article depicts the research progress of (2D+nD, where n is 0, 1 or 3) vdW heterojunctions based on 2D materials.

scholarly journals Microfluidic sensors based on two-dimensional materials for chemical and biological assessments

2022 ◽  
Author(s):  
Sithara Radhakrishnan ◽  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Layered Materials ◽  
Two Dimensional ◽  
2D Layered Materials ◽  
Sensing Applications ◽  
Exponential Increase ◽  
Two Dimensional Materials ◽  
Microfluidic Sensors ◽  
Biological Assessments

There has been an exponential increase in the number of studies of two-dimensional (2D) layered materials for sensing applications since the isolation of graphene in 2004. These materials serve as...

Contact engineering for 2D materials and devices

2018 ◽  
Vol 47 (9) ◽  
pp. 3037-3058 ◽  
Author(s):  
Daniel S. Schulman ◽  
Andrew J. Arnold ◽  
Saptarshi Das
Keyword(s):  
2D Materials ◽  
Layered Materials ◽  
Two Dimensional ◽  
The Past ◽  
2D Layered Materials ◽  
Physical Phenomena ◽  
Contact Engineering

Over the past decade, the field of two-dimensional (2D) layered materials has surged, promising a new platform for studying diverse physical phenomena that are scientifically intriguing and technologically relevant.

scholarly journals A Review on Applications of Two-Dimensional Materials in Surface-Enhanced Raman Spectroscopy

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Ming Xia
Keyword(s):  
Raman Spectroscopy ◽  
2D Materials ◽  
Surface Enhanced Raman Spectroscopy ◽  
Great Promise ◽  
Two Dimensional ◽  
Raman Enhancement ◽  
Two Dimensional Materials ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Recent Developments

Two-dimensional (2D) materials, such as graphene and MoS2, have been attracting wide interest in surface enhancement Raman spectroscopy. This perspective gives an overview of recent developments in 2D materials’ application in surface-enhanced Raman spectroscopy. This review paper focuses on the applications of using bare 2D materials and metal/2D material hybrid substrate for Raman enhancement. The Raman enhancing mechanism of 2D materials will also be discussed. The progress covered herein shows great promise for widespread adoption of 2D materials in SERS application.

scholarly journals Bidirectional and reversible tuning of the interlayer spacing of two-dimensional materials

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yiran Ding ◽  
Mengqi Zeng ◽  
Qijing Zheng ◽  
Jiaqian Zhang ◽  
Ding Xu ◽  
...  
Keyword(s):  
Active Sites ◽  
Chemical Interaction ◽  
2D Materials ◽  
Interlayer Spacing ◽  
Layered Materials ◽  
Two Dimensional ◽  
Host Materials ◽  
Two Dimensional Materials ◽  
Compression And Expansion ◽  
Spacing Variation

AbstractInterlayer spacing is expected to influence the properties of multilayer two-dimensional (2D) materials. However, the ability to non-destructively regulate the interlayer spacing bidirectionally and reversibly is challenging. Here we report the preparation of 2D materials with tunable interlayer spacing by introducing active sites (Ce ions) in 2D materials to capture and immobilize Pt single atoms. The strong chemical interaction between active sites and Pt atoms contributes to the intercalation behavior of Pt atoms in the interlayer of 2D materials and further promotes the formation of chemical bonding between Pt atom and host materials. Taking cerium-embedded molybdenum disulfide (MoS2) as an example, intercalation of Pt atoms enables interlayer distance tuning via an electrochemical protocol, leading to interlayer spacing reversible and linear compression and expansion from 6.546 ± 0.039 Å to 5.792 ± 0.038 Å (~11 %). The electronic property evolution with the interlayer spacing variation is demonstrated by the photoluminescence (PL) spectra, delivering that the well-defined barrier between the multilayer and monolayer layered materials can be artificially designed.

Recent developments in photodetector applications of Schottky diodes based on 2D materials

2021 ◽  
Author(s):  
Bhuvaneshwari Ezhilmaran ◽  
Abhinandan Patra ◽  
Stenny Benny ◽  
Sreelakshmi M R ◽  
Akshay V V ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
2D Materials ◽  
Schottky Diodes ◽  
Layered Materials ◽  
Potential Candidate ◽  
2D Layered Materials ◽  
Recent Developments ◽  
Electronic Field

In recent years, 2D layered materials have emerged as potential candidate in the opto-electronic field due to their intriguing optical, electrical and mechanical properties. Photodetectors based on 2D materials are...

scholarly journals MOLECULAR FUNCTIONALIZATION OF 2D MATERIALS

2021 ◽  
pp. 2140002
Author(s):  
MIRIAM C. RODRÍGUEZ GONZÁLEZ ◽  
RAHUL SASIKUMAR ◽  
STEVEN DE FEYTER
Keyword(s):  
2D Materials ◽  
Layered Materials ◽  
Two Dimensional ◽  
Chemical Modifications ◽  
2D Layered Materials ◽  
Non Covalent Interactions ◽  
Covalent Interactions

In this paper, we give an overview of different chemical modifications that can be done on the surface of two-dimensional (2D) layered materials. We place emphasis on the diversity of reactions that have been proposed and are now available to surface scientists working in 2D materials field. Using mainly, but not exclusively, MoS2 as example, reactions involving covalent and non-covalent interactions are discussed.

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

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