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Nanomaterials
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Functional Two-Dimensional Materials, Thin Films and Coatings
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Functional Two-Dimensional Materials, Thin Films and Coatings

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanofabrication and Nanomanufacturing".

Deadline for manuscript submissions: 8 August 2025 | Viewed by 3035

Special Issue Editor

Dr. Dimitrov Dimitre

E-Mail Website
Guest Editor
Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria
Interests: 2D materials; nanomaterials; functional thin films; phase-change materials; layered crystals; functional coatings; photovoltaics; single crystals
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are delighted to extend to you an invitation to contribute your original research to our Special Issue on “Functional Two-Dimensional Materials, Thin Films and Coatings”. This Special Issue is dedicated to exploring the preparation, characterization, properties, and applications of 2D materials, thin films, and coatings.

In recent years, nanoscale materials, thin films, and coatings have gained significant traction across various disciplines owing to their exceptional optical, electrical, magnetic, thermal, and mechanical properties, which markedly differ from those of bulk materials. The distinctive characteristics of 2D materials, such as their high surface area-to-volume ratio, surface charge, structural anisotropy, and tunable functionalities, have led to their widespread application in diverse fields such as materials science, optoelectronics, microscopy, engineering, and biomedical science.

This Special Issue endeavors to showcase recent advancements and address emerging challenges in the realms of nanomaterial science, engineering, and nanotechnology. We specifically aim to elucidate the interplay between advanced fabrication techniques, material properties, and practical applications. We warmly welcome contributions encompassing experimental, theoretical, computational, or other research of nanomaterials, spanning from 2D materials to hard (inorganic) and soft (polymeric and biological) thin films and coatings.

Our goal is to provide a platform for disseminating the latest developments in the characterization, synthesis, and applications of 2D materials, functional thin films and coatings, as well as hybrid materials/ heterostructures. We encourage submissions that explore novel preparation, transfer, and assembly techniques, as well as those that highlight industrially scalable techniques.

We look forward to receiving your valuable contributions to this exciting Special Issue.

Dr. Dimitrov Dimitre
Guest Editor

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. Nanomaterials 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 2900 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

  • functional thin films
  • nanostructured materials
  • 2D materials
  • functional coatings
  • ALD
  • CVD
  • sputtering
  • PVD
  • surface and interface sciences and engineering
  • bottom-up fabrication
  • top-down fabrication
  • atomic-scale processing
  • nanotechnology
  • smart materials
  • nanomaterials
  • antibacterial
  • structure–property relationships
  • synthesis
  • characterization

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Published Papers (4 papers)

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Research

14 pages, 2991 KiB  
Article
Investigating Benzoic Acid Derivatives as Potential Atomic Layer Deposition Inhibitors Using Nanoscale Infrared Spectroscopy
by Saumya Satyarthy, Mark Cheng and Ayanjeet Ghosh
Nanomaterials 2025, 15(3), 164; https://doi.org/10.3390/nano15030164 - 22 Jan 2025
Viewed by 421
Abstract
Area-selective atomic layer deposition (AS-ALD) is a technique utilized for the fabrication of patterned thin films in the semiconductor industry due to its capability to produce uniform and conformal structures with control over thickness at the atomic scale level. In AS-ALD, surfaces are [...] Read more.
Area-selective atomic layer deposition (AS-ALD) is a technique utilized for the fabrication of patterned thin films in the semiconductor industry due to its capability to produce uniform and conformal structures with control over thickness at the atomic scale level. In AS-ALD, surfaces are functionalized such that only specific locations exhibit ALD growth, thus leading to spatial selectivity. Self-assembled monolayers (SAMs) are commonly used as ALD inhibiting agents for AS-ALD. However, the choice of organic molecules as viable options for AS-ALD remains limited and the precise effects of ALD nucleation and exposure to ALD conditions on the structure of SAMs is yet to be fully understood. In this work, we investigate the potential of small molecule carboxylates as ALD inhibitors, namely benzoic acid and two of its derivatives, 4-trifluoromethyl benzoic acid (TBA), and 3,5-Bis (trifluoromethyl)benzoic acid (BTBA) and demonstrate that monolayers of all three molecules are viable options for applications in ALD blocking. We find that the fluorinated SAMs are better ALD inhibitors; however, this property arises not from the hydrophobicity but the coordination chemistry of the SAM. Using nanoscale infrared spectroscopy, we probe the buried monolayer interface to demonstrate that the distribution of carboxylate coordination states and their evolution is correlated with ALD growth, highlighting the importance of the interfacial chemistry in optimizing and assessing ALD inhibitors. Full article
(This article belongs to the Special Issue Functional Two-Dimensional Materials, Thin Films and Coatings)
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10 pages, 1806 KiB  
Article
Controlled Oxidation of Metallic Molybdenum Patterns via Joule Heating for Localized MoS2 Growth
by Norah Aldosari, William Poston, Gregory Jensen, Maryam Bizhani, Muhammad Tariq and Eric Stinaff
Nanomaterials 2025, 15(2), 131; https://doi.org/10.3390/nano15020131 - 16 Jan 2025
Viewed by 634
Abstract
High-quality two-dimensional transition metal dichalcogenides (2D TMDs), such as molybdenum disulfide (MoS2), have significant potential for advanced electrical and optoelectronic applications. This study introduces a novel approach to control the localized growth of MoS2 through the selective oxidation of bulk [...] Read more.
High-quality two-dimensional transition metal dichalcogenides (2D TMDs), such as molybdenum disulfide (MoS2), have significant potential for advanced electrical and optoelectronic applications. This study introduces a novel approach to control the localized growth of MoS2 through the selective oxidation of bulk molybdenum patterns using Joule heating, followed by sulfurization. By passing an electric current through molybdenum patterns under ambient conditions, localized heating induced the formation of a molybdenum oxide layer, primarily MoO2 and MoO3, depending on the applied power and heating duration. These oxides act as nucleation sites for the subsequent growth of MoS2. The properties of the grown MoS2 films were investigated using Raman spectroscopy and photoluminescence measurements, showing promising film quality. This study demonstrates that Joule heating can be an effective method for precise control over TMD growth, offering a scalable approach for producing high-quality 2D materials that have the potential to be integrated into next-generation electrical and optoelectronic technologies. Full article
(This article belongs to the Special Issue Functional Two-Dimensional Materials, Thin Films and Coatings)
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18 pages, 5355 KiB  
Article
Tuning of Water Vapor Permeability in 2D Nanocarbon-Based Polypropylene Composite Membranes
by Glykeria A. Visvini, Georgios N. Mathioudakis, Amaia Soto Beobide and George A. Voyiatzis
Nanomaterials 2025, 15(1), 11; https://doi.org/10.3390/nano15010011 - 25 Dec 2024
Viewed by 439
Abstract
This work focuses on the incorporation of 2D carbon nanomaterials, such as graphene oxide (GO), reduced graphene oxide (rGO) and graphene nanoplatelets (GNPs), into polypropylene (PP) via melt mixing. The addition of these 2D carbon nanostructured networks offers a novel approach to enhancing/controlling [...] Read more.
This work focuses on the incorporation of 2D carbon nanomaterials, such as graphene oxide (GO), reduced graphene oxide (rGO) and graphene nanoplatelets (GNPs), into polypropylene (PP) via melt mixing. The addition of these 2D carbon nanostructured networks offers a novel approach to enhancing/controlling the water vapor permeable capabilities of PP composite membranes, widely used in industrial applications, such as technical (building roof membranes) or medical (surgical gowns) textiles. The study investigates how the dispersion and concentration of these graphene nanomaterials within the PP matrix influence the microstructure and water vapor permeability (WVP) performance. The WVP measurements were conducted via the “wet” cup method. The presence of either GO, rGO or GNPs in the new polyolefin composite membranes revealed 6- to 7-fold enhanced WVP values compared to pristine PP. This improvement is attributed to the nanoindentations created at the interface of the carbon nanoinclusions with the polymer matrix in the form of nanopores that facilitate water vapor diffusion. In the particular case of GO and rGO, residual oxidative groups might contribute to the WVP as well. This is the first study to compare GO, rGO and even GNP inclusions under identical conditions, providing deeper insights into the mechanisms driving the observed improvements in WVP performance. Full article
(This article belongs to the Special Issue Functional Two-Dimensional Materials, Thin Films and Coatings)
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11 pages, 2770 KiB  
Article
Growth of Monolayer MoS2 Flakes via Close Proximity Re-Evaporation
by Blagovest Napoleonov, Dimitrina Petrova, Nikolay Minev, Peter Rafailov, Vladimira Videva, Daniela Karashanova, Bogdan Ranguelov, Stela Atanasova-Vladimirova, Velichka Strijkova, Deyan Dimov, Dimitre Dimitrov and Vera Marinova
Nanomaterials 2024, 14(14), 1213; https://doi.org/10.3390/nano14141213 - 17 Jul 2024
Cited by 1 | Viewed by 1139
Abstract
We report a two-step growth process of MoS2 nanoflakes using a low-pressure chemical vapor deposition technique. In the first step, a MoS2 layer was synthesized on a c-plane sapphire substrate. This layer was subsequently re-evaporated at a higher temperature to form [...] Read more.
We report a two-step growth process of MoS2 nanoflakes using a low-pressure chemical vapor deposition technique. In the first step, a MoS2 layer was synthesized on a c-plane sapphire substrate. This layer was subsequently re-evaporated at a higher temperature to form mono- or few-layer MoS2 flakes. As a result, the close proximity re-evaporation enabled the growth of pristine MoS2 nanoflakes. Atomic force microscopy analysis confirmed the synthesis of nanoclusters/nanoflakes with lateral dimensions of over 10 μm and a flake height of approximately 1.3 nm, demonstrating bi-layer MoS2, whereas transmission electron microscopy analysis revealed triangular MoS2 nanoflakes, with a diffraction pattern proving the presence of single crystalline hexagonal MoS2. Raman data revealed the typical modes of high-quality MoS2 nanoflakes. Finally, we presented the photocurrent dependence of a MoS2-based photoresist under illumination with light-emitting diode of 405 nm wavelength. The measured current–voltage dependence across various luminous flux outlined the sensitivity of MoS2 to polarized light and thus opens further opportunities for applications in high-performance photodetectors with polarization sensitivity. Full article
(This article belongs to the Special Issue Functional Two-Dimensional Materials, Thin Films and Coatings)
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