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Nanomaterials
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Advanced 2D Materials for Emerging Application
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Advanced 2D Materials for Emerging Application

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "2D and Carbon Nanomaterials".

Deadline for manuscript submissions: 10 October 2024 | Viewed by 8614

Special Issue Editor

Dr. Maiyong Zhu

E-Mail Website
Guest Editor
School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China
Interests: carbon based materials; low-dimensional inorganic materials; metal organic frameworks; conducting polymers; energy conversion and storage; catalysis; environment treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the discovery of graphene in 2004, two-dimensional (2D) materials have received increasing attention owing to their unique electronic, optical, mechanical, and chemical properties. To date, 2D materials including graphdiyne, transition metal dichalcogenides (TMDs), graphitic carbon nitride (g-C3N4), hexagonal boron nitride (h-BN), black phosphorus (BP), MXenes, and metallene have been screened and have many applications, such as in semiconductors and photovoltaics. For example, due to their large surface area and strong interaction with various biomolecules, many sensors/catalysts have been explored based on 2D materials. In addition, their thin or molecularly thin levels make them useful in thickness-dependent applications, such as in photodetectors. Furthermore, compositing with other components endows 2D materials with outstanding optical/electronic/mechanical properties, which offer great opportunities for developing more advanced 2D-material-based devices. Significantly, computational tools enable the exploration of possible routes to tailor the electronic/band structure of 2D materials by taking advantage of mechanical strain, defect engineering, bias potential, and element doping, leading to the enhanced application performance of 2D materials.

Despite these achievements in the area of 2D materials, challenges still exist in both developing new 2D materials and expanding their applications. Regarding industrialization preparation, approaches that enable the large-scale production of 2D materials with high quality and controlled structure are lacking, since most currently available 2D materials are confined to laboratories. Furthermore, to unveil the correlation between the structural features and properties of 2D materials, precise tailoring of their compositions, crystal phases, thicknesses, lateral sizes, and surface termination groups is of paramount importance. In addition, inflexibility and opacity constitute the main bottleneck for conventional 2D materials. Thanks to continuous efforts in various research fields, this major milestone will be reached when the commercialization of 2D materials in our daily lives is finally realized.

With a view to achieving these goals, this Special Issue will focus on new ideas and recent progress in 2D materials and will cover a wide range of topics. Both original research and review articles are welcome, with areas of interest including, but not limited to:

  • The synthesis of 2D materials;
  • Characterization techniques for 2D materials;
  • Theoretical calculation methods of the expected properties of 2D materials;
  • Two-dimensional-material-based catalysts;
  • Two-dimensional-material-based sensors;
  • Two-dimensional-material-based electrodes for various energy conversion and storage devices;
  • Two-dimensional-material-based drug carriers.

Dr. Maiyong Zhu
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

  • 2D materials
  • two dimensional material
  • energy conversion and storage devices
  • drug carriers
  • catalysts
  • sensors

Published Papers (5 papers)

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Research

8 pages, 3148 KiB  
Communication
SnS2 as a Saturable Absorber for Mid-Infrared Q-Switched Er:SrF2 Laser
by Chun Li, Qi Yang, Yuqian Zu, Syed Zaheer Ud Din, Yu Yue, Ruizhan Zhai and Zhongqing Jia
Nanomaterials 2023, 13(13), 1989; https://doi.org/10.3390/nano13131989 - 30 Jun 2023
Viewed by 830
Abstract
Two-dimensional (2D) materials own unique band structures and excellent optoelectronic properties and have attracted wide attention in photonics. Tin disulfide (SnS2), a member of group IV-VI transition metal dichalcogenides (TMDs), possesses good environmental optimization, oxidation resistance, and thermal stability, making it [...] Read more.
Two-dimensional (2D) materials own unique band structures and excellent optoelectronic properties and have attracted wide attention in photonics. Tin disulfide (SnS2), a member of group IV-VI transition metal dichalcogenides (TMDs), possesses good environmental optimization, oxidation resistance, and thermal stability, making it more competitive in application. By using the intensity-dependent transmission experiment, the saturable absorption properties of the SnS2 nanosheet nearly at 3 μm waveband were characterized by a high modulation depth of 32.26%. Therefore, a few-layer SnS2 was used as a saturable absorber (SA) for a bulk Er:SrF2 laser to research its optical properties. When the average output power was 140 mW, the passively Q-switched laser achieved the shortest pulse width at 480 ns, the optimal single pulse energy at 3.78 µJ, and the highest peak power at 7.88 W. The results of the passively Q-switched laser revealed that few-layer SnS2 had an admirable non-linear optical response at near 3 μm mid-infrared solid-state laser. Full article
(This article belongs to the Special Issue Advanced 2D Materials for Emerging Application)
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14 pages, 4336 KiB  
Article
Automated Prediction of Bacterial Exclusion Areas on SEM Images of Graphene–Polymer Composites
by Shadi Rahimi, Teo Lovmar, Alexandra Aulova, Santosh Pandit, Martin Lovmar, Sven Forsberg, Magnus Svensson, Roland Kádár and Ivan Mijakovic
Nanomaterials 2023, 13(10), 1605; https://doi.org/10.3390/nano13101605 - 10 May 2023
Cited by 2 | Viewed by 1159
Abstract
To counter the rising threat of bacterial infections in the post-antibiotic age, intensive efforts are invested in engineering new materials with antibacterial properties. The key bottleneck in this initiative is the speed of evaluation of the antibacterial potential of new materials. To overcome [...] Read more.
To counter the rising threat of bacterial infections in the post-antibiotic age, intensive efforts are invested in engineering new materials with antibacterial properties. The key bottleneck in this initiative is the speed of evaluation of the antibacterial potential of new materials. To overcome this, we developed an automated pipeline for the prediction of antibacterial potential based on scanning electron microscopy images of engineered surfaces. We developed polymer composites containing graphite-oriented nanoplatelets (GNPs). The key property that the algorithm needs to consider is the density of sharp exposed edges of GNPs that kill bacteria on contact. The surface area of these sharp exposed edges of GNPs, accessible to bacteria, needs to be inferior to the diameter of a typical bacterial cell. To test this assumption, we prepared several composites with variable distribution of exposed edges of GNP. For each of them, the percentage of bacterial exclusion area was predicted by our algorithm and validated experimentally by measuring the loss of viability of the opportunistic pathogen Staphylococcus epidermidis. We observed a remarkable linear correlation between predicted bacterial exclusion area and measured loss of viability (R2 = 0.95). The algorithm parameters we used are not generally applicable to any antibacterial surface. For each surface, key mechanistic parameters must be defined for successful prediction. Full article
(This article belongs to the Special Issue Advanced 2D Materials for Emerging Application)
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10 pages, 2071 KiB  
Article
Reconfigurable Single-Layer Graphene Radio Frequency Antenna Device Capable of Changing Resonant Frequency
by Hyeon Jun Hwang, So-Young Kim, Sang Kyung Lee and Byoung Hun Lee
Nanomaterials 2023, 13(7), 1203; https://doi.org/10.3390/nano13071203 - 28 Mar 2023
Viewed by 1392
Abstract
A reconfigurable passive device that can manipulate its resonant frequency by controlling its quantum capacitance value without requiring complicated equipment has been experimentally investigated by modifying the Fermi level of large-area graphene using an external electric field. When the total capacitance change, caused [...] Read more.
A reconfigurable passive device that can manipulate its resonant frequency by controlling its quantum capacitance value without requiring complicated equipment has been experimentally investigated by modifying the Fermi level of large-area graphene using an external electric field. When the total capacitance change, caused by the gate bias in the passive graphene device, was increased to 60% compared to the initial state, a 6% shift in the resonant frequency could be achieved. While the signal characteristics of the graphene antenna are somewhat inferior compared to the conventional metal antenna, simplifying the device structure allowed reconfigurable characteristics to be implemented by using only the gate bias change. Full article
(This article belongs to the Special Issue Advanced 2D Materials for Emerging Application)
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14 pages, 5236 KiB  
Article
Enlarged Interlayer Spacing of Marigold-Shaped 1T-MoS2 with Sulfur Vacancies via Oxygen-Assisted Phosphorus Embedding for Rechargeable Zinc-Ion Batteries
by Qinhu Xu, Xinyu Li, Luchen Wu, Zhen Zhang, Yong Chen, Ling Liu and Yong Cheng
Nanomaterials 2023, 13(7), 1185; https://doi.org/10.3390/nano13071185 - 27 Mar 2023
Cited by 2 | Viewed by 1552
Abstract
Structural unsteadiness and sluggish diffusion of divalent zinc cations in cathodes during cycling severely limit further applications of MoS2 for rechargeable aqueous zinc-ion batteries (ZIBs). To circumvent these hurdles, herein, phosphorus (P) atom embedded three-dimensional marigold-shaped 1T MoS2 structures combined with [...] Read more.
Structural unsteadiness and sluggish diffusion of divalent zinc cations in cathodes during cycling severely limit further applications of MoS2 for rechargeable aqueous zinc-ion batteries (ZIBs). To circumvent these hurdles, herein, phosphorus (P) atom embedded three-dimensional marigold-shaped 1T MoS2 structures combined with the design of S vacancies (Sv) are synthesized via the oxygen-assisted solvent heat method. The oxygen-assisted method is utilized to aid the P-embedding into the MoS2 crystal, which can expand the interlayer spacing of P-MoS2 and strengthen Zn2+ intercalation/deintercalation. Meanwhile, the three-dimensional marigold-shaped structure with 1T phase retains the internal free space, can adapt to the volume change during charge and discharge, and improve the overall conductivity. Moreover, Sv is not only conducive to the formation of rich active sites to diffuse electrons and Zn2+ but also improves the storage capacity of Zn2+. The electrochemical results show that P-MoS2 can reach a high specific capacity of 249 mAh g−1 at 0.1 A g−1. The capacity remains at 102 mAh g−1 after 3260 cycles at a current of 0.5 A g−1, showing excellent electrochemical performance for Zn2+ ion storage. This research provides a more efficient method of P atom embedded MoS2-based electrodes and will heighten our comprehension of developing cathodes for the ZIBs. Full article
(This article belongs to the Special Issue Advanced 2D Materials for Emerging Application)
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13 pages, 3185 KiB  
Article
The Surface Properties of Implant Materials by Deposition of High-Entropy Alloys (HEAs)
by Khalid Usman, Doori Kang, Geonwoo Jeong, Khurshed Alam, Athira Raveendran, Jinhui Ser, Woohyung Jang and Hoonsung Cho
Nanomaterials 2023, 13(6), 1123; https://doi.org/10.3390/nano13061123 - 21 Mar 2023
Cited by 3 | Viewed by 1975
Abstract
High-entropy alloys (HEAs) contain more than five alloying elements in a composition range of 5–35% and with slight atomic size variation. Recent narrative studies on HEA thin films and their synthesis through deposition techniques such as sputtering have highlighted the need for determining [...] Read more.
High-entropy alloys (HEAs) contain more than five alloying elements in a composition range of 5–35% and with slight atomic size variation. Recent narrative studies on HEA thin films and their synthesis through deposition techniques such as sputtering have highlighted the need for determining the corrosion behaviors of such alloys used as biomaterials, for example, in implants. Coatings composed of biocompatible elements such as titanium, cobalt, chrome, nickel, and molybdenum at the nominal composition of Co30Cr20Ni20Mo20Ti10 were synthesized by means of high-vacuum radiofrequency magnetron (HVRF) sputtering. In scanning electron microscopy (SEM) analysis, the coating samples deposited with higher ion densities were thicker than those deposited with lower ion densities (thin films). The X-ray diffraction (XRD) results of the thin films heat treated at higher temperatures, i.e., 600 and 800 °C, revealed a low degree of crystallinity. In thicker coatings and samples without heat treatment, the XRD peaks were amorphous. The samples coated at lower ion densities, i.e., 20 µAcm−2, and not subjected to heat treatment yielded superior results in terms of corrosion and biocompatibility among all the samples. Heat treatment at higher temperatures led to alloy oxidation, thus compromising the corrosion property of the deposited coatings. Full article
(This article belongs to the Special Issue Advanced 2D Materials for Emerging Application)
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