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Crystals
Special Issues
Nanomaterials for Potential Applications
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Nanomaterials for Potential Applications

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Hybrid and Composite Crystalline Materials".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 4462

Special Issue Editors

Dr. Mohamed A. Tahoon

E-Mail Website
Guest Editor
1. Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
2.Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
Interests: nanomaterials; adsorption; water treatment; nanosensing; bioremediation; sustainability
Dr. Abdelfattah Amari

E-Mail Website
Guest Editor
1. Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61411, Saudi Arabia
2. Research Laboratory of Processes, Energetics, Environment and Electrical Systems, National School of Engineers, Gabes University, Gabes 6072, Tunisia
Interests: environmental engineering; green chemistry; characterization; optoelectronics; water treatment; nanotechnology

Special Issue Information

Dear Colleagues,

Nanotechnology and new nanomaterials have an enormous impact on modern science, technology, and everyday life. The term “nanomaterial" refers to a single material with multiple applications in different fields. Novel/modified synthetic approaches (physical, chemical, and biological) can be used for the synthesis of these materials, including inorganic (metal–metal oxide and their composites), organic (carbon nanotube and graphene oxide), and hybrid nanocomposites, to achieve a precise control over their physico-chemical properties.  To date, nanoscale technologies are actively studied and applied to solve the most pressing global challenges, from human health to environmental problems. Nanomaterials and nanostructures have various applications in biomedicine, bioanalysis and biodiagnostic, forensic, agriculture, environmental protection, water treatment, food industries, textile industries, sensors, electronics, and communication. Regarding the treatment of water, nanomaterials can be used as photocatalysts and adsorbents for the remediation of heavy metals, pesticides, pharmaceutical waste, dyes, and other toxic chemicals from the air, soil, and water. Moreover, they have also been used as antibacterial, antifungal, anticancer, anti-inflammatory, and antioxidant agents.

In this context, the aim of this Special Issue is to publish original research papers and comprehensive reviews which deal with the most important issues concerning the synthesis, investigation of the advanced properties, and potential applications of different nanomaterials.

Dr. Mohamed A. Tahoon
Dr. Abdelfattah Amari
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. Crystals is an international peer-reviewed open access monthly 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

  • applied nanotechnology
  • water treatment
  • nanosensors
  • nanoelectronics
  • photocatalysis
  • hybrid nanocomposite
  • adsorption
  • metal-organic framework
  • biomedical applications
  • environmental applications

Published Papers (3 papers)

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Research

13 pages, 3042 KiB  
Article
Ferroelectric SnPz/In2Se3 as a Stable and Durable Non-Volatile 2D Ferroelectric Memory Material
by Weiwei Ren, Jintao Tian, Rui Pang and Yuanyuan Shang
Crystals 2023, 13(6), 940; https://doi.org/10.3390/cryst13060940 - 11 Jun 2023
Viewed by 1218
Abstract
In ferroelectric memory, the repeated application of external electric fields can cause ferroelectric fatigue, limiting its stability and service life, especially as the storage unit size decreases. To address this issue, we conducted first-principles research on a SnPz/In2Se3 structure and [...] Read more.
In ferroelectric memory, the repeated application of external electric fields can cause ferroelectric fatigue, limiting its stability and service life, especially as the storage unit size decreases. To address this issue, we conducted first-principles research on a SnPz/In2Se3 structure and examined its structure under different polarization directions. Our analysis revealed significant differences in the adsorption position of Sn atoms depending on the polarization direction, suggesting that SnPz/In2Se3 could be a highly stable ferroelectric storage material. Moreover, the polarization-induced changes in the electronic structure near the Fermi level, which allowed for the use of tunneling current and obtaining stored information without causing the ferroelectric fatigue effect during information readout. These findings highlight the potential of SnPz/In2Se3 to significantly extend the lifespan of ferroelectric materials, reduce energy consumption, and minimize the environmental impact of discarded electronic devices. Full article
(This article belongs to the Special Issue Nanomaterials for Potential Applications)
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21 pages, 4558 KiB  
Article
Nanomaterial Sensing Advantages: Electrochemical Behavior, Optimization and Performance of f-MWCNTs/CS/PB/AuE towards Aluminum Ions (Al3+) in Drinking Water
by Gilbert Ringgit, Shafiquzzaman Siddiquee, Suryani Saallah and Mohammad Tamrin Mohamad Lal
Crystals 2023, 13(3), 497; https://doi.org/10.3390/cryst13030497 - 14 Mar 2023
Cited by 1 | Viewed by 1402
Abstract
Modern technology has been evolving towards nanotechnology due to the materials that can be transformed and manipulated on micro and nanoscales. In terms of detection, nanomaterials offer substantial sensing advantages, particularly in terms of enhanced sensitivity, synergistic effect, stability and selectivity. The immobilization [...] Read more.
Modern technology has been evolving towards nanotechnology due to the materials that can be transformed and manipulated on micro and nanoscales. In terms of detection, nanomaterials offer substantial sensing advantages, particularly in terms of enhanced sensitivity, synergistic effect, stability and selectivity. The immobilization of nanoparticles could alter the physicochemical properties of the electrode’s surface depending on the type of materials synthesized and employed. This research examined the synthesis of multiwalled carbon nanotubes (MWCNTs) and chitosan (CS), as well as the immobilization of Prussian blue (PB) on the surface of a bare gold electrode (AuE). These materials have been reported to have strong electrical conductivity and nanomaterial compatibility. In contrast, aluminum has been described as a replacement for traditional water quality treatment processes, such as chlorination and ozonation. Aluminum concentrations must be monitored despite the use of chemical treatment for water quality. Hence, excessive levels of exposure frequently result in neurotoxic effects including Alzheimer’s and Parkinson’s disorders. In this experiment, the optimal conditions for f-MWCNTs, CS, PB, and AuE for the detection of Al3+ are phosphate-buffered saline (PBS) (0.1 M, pH 2) with 5 mM Prussian Blue; scan rate = 0.25 Vs−1; accumulation duration = 25 s; and volume = 10 mL (ratio of 4:6). The performance of f-MWCNTs, CS, PB, and AuE was measured between 0.2 and 1 ppm with a correlation coefficient of R2 = 0.9853 (y = 0.0387x + 0.0748). The limit of detection (LOD) of the modified electrode was determined to be 0.002 ppm, with a recovery of 98.66–99.56%. The application of nanoparticles resulted in various advantages, including high conductivity, a simple, less time-consuming preparation technique, and enhanced sensitivity and stability for detecting the lowest concentration of Al3+ in drinking water. Full article
(This article belongs to the Special Issue Nanomaterials for Potential Applications)
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18 pages, 3443 KiB  
Article
The Fabrication of Gold–Silver Bimetallic Colloids by Microplasma: A Worthwhile Strategy for Counteracting the Surface Activity of Avian Influenza Virus
by Muhammad Zubair, Muhammad Shahid Rafique, Afshan Khalid, Tahir Yaqub, Muhammad Furqan Shahid, Suliman Yousef Alomar and Muhammad Ali Shar
Crystals 2023, 13(2), 340; https://doi.org/10.3390/cryst13020340 - 16 Feb 2023
Cited by 2 | Viewed by 1406
Abstract
In the present project, fructose-stabilized gold, silver and gold–silver bimetallic colloids have been synthesized by the electrochemical reduction of HAuCl4·3H2O (Au precursor) and AgNO3 (Ag precursor), employing the atmospheric pressure microplasma technique. X-Ray Diffraction patterns of gold–silver bimetallic [...] Read more.
In the present project, fructose-stabilized gold, silver and gold–silver bimetallic colloids have been synthesized by the electrochemical reduction of HAuCl4·3H2O (Au precursor) and AgNO3 (Ag precursor), employing the atmospheric pressure microplasma technique. X-Ray Diffraction patterns of gold–silver bimetallic particles exhibit (111), (200) and (220) planes identical to gold and silver NPs depicting FCC structures. The decrease in the peak intensities of Au–Ag (111) and Au–Ag (200) as compared to those of Au (111) and (200) is due to the formation of Au–Ag alloys. The FE-SEM image of gold–silver bimetallic NPs has revealed an adequate change in morphology as compared to the morphology of gold NPs and silver NPs. The majority of the gold–silver bimetallic NPs are spherical and are uniformly dispersed. The EDS spectra of (Au–Ag) confirm the presence of metallic gold and silver. The appearance of a single Surface Plasmon Resonance (SPR) peak in the UV–VIS absorption spectra of gold–silver colloids and its position in between the SPR peaks of the UV–VIS absorption spectra of gold and silver colloids justify the formation of gold–silver bimetallic alloy particles. In DLS measurements, the size distribution of gold–silver bimetallic colloids carries a narrow range 55 to 117 nm as compared to the size distribution of gold and silver colloids. The compatibility of the sizes of these colloids and the influenza virus belonging to the Orthomyxoviruses family (size range 80–300 nm with different morphologies) are assumed to stand responsible for an effective bio-conjunction with Influenza viruses. Au–Ag bimetallic nanostructures have synergistically improved their antiviral activity against H9N2 influenza virus as compared to monometallic AuNPs and AgNPs. Thus, the Au–Ag nanostructured alliance has been proven to be more effective and is capable of manifesting high antiviral efficacy. Full article
(This article belongs to the Special Issue Nanomaterials for Potential Applications)
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