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Recent Progress on Thin 2D Materials
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Recent Progress on Thin 2D Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: 20 September 2024 | Viewed by 2448

Special Issue Editors

Dr. Dan Wang

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: 2D materials; first-principles calculations; excited-state properties; doping physics; computational methods development
Dr. Zhe Shi

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139 USA
Interests: first-principles calculations; machine learning; elastic engineering; low-dimensional materials

Special Issue Information

Dear Colleagues,

Beyond the renowned graphene, an array of other 2D materials, such as transition metal dichalcogenides (TMDCs), hexagonal boron nitride (h-BN), and phosphorene, have emerged, showcasing a plethora of unique and diverse properties. The pace at which these materials are being discovered and studied is truly remarkable. These atomically thin materials, with their unique electrical, thermal, optical, and mechanical properties, have unlocked novel avenues in the realms of electronics, photonics, energy storage, and even biomedical applications.

The burgeoning interest from both industry and academia underpins their significance. Grasping a comprehensive understanding of these 2D materials is crucial not only for their fundamental research, but also their technological applications. This Special Issue aims to highlight cutting-edge advancements in the synthesis, characterization, application, and theoretical computations of thin 2D materials. We are particularly interested in studies focusing on innovative fabrication techniques, novel characterization methods, groundbreaking applications, and advanced theoretical modeling and predictions that elucidate the intricate behaviors and potentials of these materials.

Original research articles, reviews, and perspective pieces that delve into the aforementioned areas are warmly welcomed. Together, let us sketch the evolving landscape of thin 2D materials and explore the innovations they are set to bring, forging pathways for future research and applications.

Dr. Dan Wang
Dr. Zhe Shi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • two-dimensional (2D) materials
  • atomically-thin systems
  • synthesis techniques
  • advanced characterization
  • theoretical predictions and modeling
  • innovative methodological development
  • material interfaces and junctions
  • practical and emerging applications

Published Papers (3 papers)

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Research

17 pages, 6729 KiB  
Article
Characterization of NiCuOxNy Coatings Obtained via RF Sputtering: Structure, Morphology, and Optical Properties
by Karen Lizzette Velásquez-Méndez, José Edgar Alfonso, Manuel Bethencourt, Gustavo Cifredo and Gloria Ivonne Cubillos
Materials 2024, 17(13), 3264; https://doi.org/10.3390/ma17133264 - 2 Jul 2024
Viewed by 552
Abstract
The rapid advancement of technology necessitates the continual development of versatile materials that can adapt to new electronic devices. Rare earth elements, which are scarce in nature, possess the set of properties required for use as semiconductors. Consequently, this research aims to achieve [...] Read more.
The rapid advancement of technology necessitates the continual development of versatile materials that can adapt to new electronic devices. Rare earth elements, which are scarce in nature, possess the set of properties required for use as semiconductors. Consequently, this research aims to achieve similar properties using materials that are abundant in nature and have a low commercial cost. To this end, nickel and copper were utilized to synthesize thin films of nickel–copper binary oxynitride via reactive RF sputtering. The influence of nitrogen flow on the structure, morphology, chemical composition, and optical properties of the films was investigated using various characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS), as well as transmittance and absorbance measurements. The crystalline structure of the films shows that they can have preferential growth or be polycrystalline according to the nitrogen flow used during deposition and that both the oxides and oxynitrides of metals are formed. We identified unknown phases specific to this material, termed “NiCuOxNy”. The morphology revealed that the grain size of the coatings was dependent on the nitrogen flow rate, with grain size decreasing as the nitrogen flow rate increased. Notably, the coatings demonstrated transparency for wavelengths exceeding 1000 nm, with an optical band gap ranging from 1.21 to 1.86 eV. Full article
(This article belongs to the Special Issue Recent Progress on Thin 2D Materials)
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21 pages, 9280 KiB  
Article
Thin Layers of Cerium Oxynitride Deposited via RF Sputtering
by Gloria Carolina Numpaque, Manuel Bethencourt and Gloria Ivonne Cubillos
Materials 2024, 17(13), 3142; https://doi.org/10.3390/ma17133142 - 27 Jun 2024
Viewed by 421
Abstract
Thin films of transition metal oxides and oxynitrides have proven highly effective in protecting stainless steels against corrosion in both chemically aggressive environments and biological fluids. In the present work, cerium zirconium oxynitride thin films were deposited to enhance the corrosion resistance of [...] Read more.
Thin films of transition metal oxides and oxynitrides have proven highly effective in protecting stainless steels against corrosion in both chemically aggressive environments and biological fluids. In the present work, cerium zirconium oxynitride thin films were deposited to enhance the corrosion resistance of surgical-grade stainless steel to be used in osteosynthesis processes. Two techniques were employed: co-sputtering and radiofrequency (RF) sputtering, and the morphology and corrosion efficiency of the coatings deposited by each technique were evaluated. X-ray diffraction, X-ray photoelectron spectroscopy and field emission transmission electron microscopy were used to characterize the morphological and chemical structure, respectively. Additionally, the corrosion resistance of the oxynitride-coated surgical grade stainless steel system (ZrCeOxNy-AISI 316L) was assessed using Hank’s solution as the corrosive electrolyte, to determine its resistance to corrosion in biological media. The results show that ZrCeOxNy coatings increase the corrosion resistance of surgical grade stainless steel by two orders of magnitude and that the Ce(III)/Ce(IV) equilibrium decreases the corrosion rate, thereby increasing the durability of the steel in a biological environment. The results show that Ce coatings increase the corrosion resistance of surgical grade stainless steel by two orders of magnitude and that the Ce(III)/Ce(IV) equilibrium decreases the corrosion rate, thereby increasing the durability of the steel in a biological environment. Full article
(This article belongs to the Special Issue Recent Progress on Thin 2D Materials)
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19 pages, 8715 KiB  
Article
Quantum-Size Effects in Ultra-Thin Gold Films on Pt(111) Surface
by Yury M. Koroteev, Igor V. Silkin, Vyacheslav M. Silkin and Evgueni V. Chulkov
Materials 2024, 17(1), 63; https://doi.org/10.3390/ma17010063 - 22 Dec 2023
Viewed by 1067
Abstract
We calculate, within the density-functional theory, the atomic and electronic structure of the clean Pt(111) and Au(111) surfaces and the nML-Au/Pt(111) systems with n varying from one to three. The effect of the spin–orbital interaction was taken into account. Several new electronic [...] Read more.
We calculate, within the density-functional theory, the atomic and electronic structure of the clean Pt(111) and Au(111) surfaces and the nML-Au/Pt(111) systems with n varying from one to three. The effect of the spin–orbital interaction was taken into account. Several new electronic states with strong localization in the surface region were found and discussed in the case of clean surfaces. The Au adlayers introduce numerous quantum well states in the energy regions corresponding to the projected bulk band continuum of Au(111). Moreover, the presence of states resembling the true Au(111) surface states can be detected at n = 2 and 3. The Au/Pd interface states are found as well. In nML-Au/Pt(111), the calculated work function presents a small variation with a variation of the number of the Au atomic layer. Nevertheless, the effect is significantly smaller in comparison to the s-p metals. Full article
(This article belongs to the Special Issue Recent Progress on Thin 2D Materials)
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