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Synthesis, Manipulation, Properties and Applications of Layered Materials
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Synthesis, Manipulation, Properties and Applications of Layered Materials

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (31 May 2021) | Viewed by 10639

Special Issue Editors

Dr. Camilli Luca

E-Mail Website
Guest Editor
Physics Department, Technical University of Denmark, Kgs. Lyngby, Denmark
Interests: low-dimensional materials; surface dynamics; scanning tunneling microscopy; electronic structure of materials; synthesis of nanomaterials
Prof. Maurizio Passacantando

E-Mail Website
Co-Guest Editor
Università degli Studi dell'Aquila, L'Aquila, Italy
Interests: graphene and other 2D materials; electronic and structural properties of low dimensional carbon-based materials; nanoscience and nanotechnology; growth of carbon-based nanomaterials
Prof. Dr. Antonio Di Bartolomeo

E-Mail Website
Co-Guest Editor
Department of Physics “E.R. Caianiello”, University of Salerno, 84084 Fisciano, Italy
Interests: optical and electrical properties of nanostructured materials such as carbon nanotubes, graphene, and 2D materials; van der Waals heterostructures and Schottky junctions; field-effect transistors; non-volatile memories; solar cells; photodetectors; field emission devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Layered materials such as graphite, hexagonal boron nitride, and transition metal dichalcogenides possess a layered structure where the layers interact with each other via a weak van der Waals force. This interaction is weak enough so that these materials can simply be mechanically exfoliated to obtain few, or even single layers.

This class of materials exhibits fascinating electronic and optical properties, which are strongly influenced by the number of layers, or by the interaction with substrate and the external environment—for instance, via mechanical strain, or doping. In other words, it is possible to tune the properties of these materials to better fit the requirements for a specific application.

Furthermore, the individual layers could be thought of as building blocks and thus assembled together to form artificial structures, called van der Waals heterostructures, with unique physical properties.

As a consequence, they have recently received renewed attention because of their potential applications in a number of electronic devices, from sensors to memories, from transistors to solar cells, from batteries and supercapacitors to fuel cells.

We kindly invite you to submit your work for this Special Issue. Experimental studies as well as theoretical investigations are appreciated. Full research papers, communications, and reviews are all welcome.

Dr. Camilli Luca
Prof. Maurizio Passacantando
Prof. Antonio di Bartolomeo
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

  • Synthesis of layered materials
  • Functionalization of layered materials
  • Electronic and optoelectronic properties
  • Van der Waals heterostructures
  • Layered material–light interaction
  • Theoretical models in layered materials
  • Electronic devices
  • Energy devices

Published Papers (4 papers)

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Research

9 pages, 45050 KiB  
Article
Chemical Vapor Deposition of N-Doped Graphene through Pre-Implantation of Nitrogen Ions for Long-Term Protection of Copper
by Luoqiao Han, Lei Dong, Haiyan Chen, Shuai Yang, Aiheng Yuan, Ran Guan, Hong Yan, Jing Wu, Bo Zhang, Dejun Li and Birong Luo
Materials 2021, 14(13), 3751; https://doi.org/10.3390/ma14133751 - 05 Jul 2021
Cited by 1 | Viewed by 2007
Abstract
Nitrogen-doped graphene (NG) was synthesized through the chemical vapor deposition (CVD) of graphene on Cu substrates, which were pre-implanted with N ions by the ion implantation method. The pre-implanted N ions in the Cu substrate could dope graphene by the substitution of C [...] Read more.
Nitrogen-doped graphene (NG) was synthesized through the chemical vapor deposition (CVD) of graphene on Cu substrates, which were pre-implanted with N ions by the ion implantation method. The pre-implanted N ions in the Cu substrate could dope graphene by the substitution of C atoms during the CVD growth of graphene, forming NG. Based on this, NG’s long-term protection properties for Cu were evaluated by ambient exposure for a corrosion test. The results showed that NG can obviously reduce the natural oxidation of Cu in the long-term exposure compared with the case of pristine graphene (PG) coated on Cu. Moreover, with the increase in pre-implanted N dose, the formed NG’s long-term protection for Cu improved. This indicates that the modification of graphene by N doping is an effective way to improve the corrosion resistance of the PG coating owing to the reduction in its conductivity, which would inhibit galvanic corrosion by cutting off electron transport across the interface in their long-term protection. These findings provide insight into corrosion mechanisms of the graphene coating and correlate with its conductive nature based on heteroatoms doping, which is a potential route for improving the corrosion resistance of graphene as an effective barrier coating for metals. Full article
(This article belongs to the Special Issue Synthesis, Manipulation, Properties and Applications of Layered Materials)
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12 pages, 19485 KiB  
Article
Orientation Identification of the Black Phosphorus with Different Thickness Based on B2g Mode Using a Micro-Raman Spectroscope under a Nonanalyzer Configuration
by Rubing Li, Yongchao Shang, Huadan Xing, Xiaojie Wang, Mingyuan Sun and Wei Qiu
Materials 2020, 13(23), 5572; https://doi.org/10.3390/ma13235572 - 07 Dec 2020
Cited by 8 | Viewed by 1922
Abstract
As an anisotropic material, the unique optoelectronic properties of black phosphorus are obviously anisotropic. Therefore, non-destructive and fast identification of its crystalline orientation is an important condition for its application in optoelectronics research field. Identifying the crystalline orientation of black phosphorus through A [...] Read more.
As an anisotropic material, the unique optoelectronic properties of black phosphorus are obviously anisotropic. Therefore, non-destructive and fast identification of its crystalline orientation is an important condition for its application in optoelectronics research field. Identifying the crystalline orientation of black phosphorus through Ag1 and Ag2 modes under the parallel polarization has high requirements on the Raman system, while in the nonanalyzer configuration, the crystalline orientation of the thick black phosphorus may not be identified through Ag1 and Ag2 modes. This work proposes a new method to identify the crystalline orientation of black phosphorus of different thicknesses. This method is conducted under the nonanalyzer configuration by B2g mode. The results show that B2g mode has a good consistency in the identification of crystalline orientations. In this paper, a theoretical model is established to study the angle-resolved Raman results of B2g mode. The new method can accurately identify the crystalline orientation with different layers of black phosphorus without misidentification. Full article
(This article belongs to the Special Issue Synthesis, Manipulation, Properties and Applications of Layered Materials)
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11 pages, 3061 KiB  
Article
Interlayer Bound Wannier Excitons in Germanium Sulfide
by Sara Postorino, Jianbo Sun, Saskia Fiedler, Laurent O. Lee Cheong Lem, Maurizia Palummo and Luca Camilli
Materials 2020, 13(16), 3568; https://doi.org/10.3390/ma13163568 - 12 Aug 2020
Cited by 3 | Viewed by 2889
Abstract
We report a cathodoluminescence (CL) study of layered germanium sulfide (GeS) where we observe a sharp emission peak from flakes covered with a thin hexagonal boron nitride film. GeS is a material that has recently attracted considerable interest due to its emission in [...] Read more.
We report a cathodoluminescence (CL) study of layered germanium sulfide (GeS) where we observe a sharp emission peak from flakes covered with a thin hexagonal boron nitride film. GeS is a material that has recently attracted considerable interest due to its emission in the visible region and its strong anisotropy. The measured CL peak is at ~1.69 eV for samples ranging in thickness from 97 nm to 45 nm, where quantum-confinement effects can be excluded. By performing ab initio ground- and excited-state simulations for the bulk compound, we show that the measured optical peak can be unambiguously explained by radiative recombination of the first free bright bound exciton, which is due to a mixing of direct transitions near the Γ-point of the Brillouin Zone and it is associated to a very large optical anisotropy. The analysis of the corresponding excitonic wave function shows a Wannier–Mott interlayer character, being spread not only in-plane but also out-of-plane. Full article
(This article belongs to the Special Issue Synthesis, Manipulation, Properties and Applications of Layered Materials)
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14 pages, 3310 KiB  
Article
Silver Nanoparticle Surface Enabled Self-Assembly of Organic Dye Molecules
by Hua Deng and Hongtao Yu
Materials 2019, 12(16), 2592; https://doi.org/10.3390/ma12162592 - 14 Aug 2019
Cited by 9 | Viewed by 3313
Abstract
Fluorescence titration of methylene blue, rhodamine B and rhodamine 6G (R6G) by silver nanoparticle (AgNP) all resulted in an initial steep quenching curve followed with a sharp turn and a much flatter quenching curve. At the turn, there are about 200,000 dye molecules [...] Read more.
Fluorescence titration of methylene blue, rhodamine B and rhodamine 6G (R6G) by silver nanoparticle (AgNP) all resulted in an initial steep quenching curve followed with a sharp turn and a much flatter quenching curve. At the turn, there are about 200,000 dye molecules per a single AgNP, signifying self-assembly of approximately 36-layers of dye molecules on the surface of the AgNP to form a micelle-like structure. These fluorescence-quenching curves fit to a mathematical model with an exponential term due to molecular self-assembly on AgNP surface, or we termed it “self-assembly shielding effect”, and a Stern-Volmer term (nanoparticle surface enhanced quenching). Such a “super-quenching” by AgNP can only be attributed to “pre-concentration” of the dye molecules on the nanoparticle surface that yields the formation of micelle-like self-assembly, resulting in great fluorescence quenching. Overall, the fluorescence quenching titration reveals three different types of interactions of dye molecules on AgNP surface: 1) self-assembly (methylene blue, rhodamine B and R6G), 2) absorption/tight interaction (tryptamine and fluorescein), and 3) loose interaction (eosin Y). We attribute the formation of micelle-like self-assembly of these three dye molecules on AgNP to their positive charge, possession of nitrogen atoms, and with relatively large and flat aromatic moieties. Full article
(This article belongs to the Special Issue Synthesis, Manipulation, Properties and Applications of Layered Materials)
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