Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.7
4.6
Journals
Molecules
Special Issues
Synthesis and Characterization of Metal Nanoparticles and Metal Oxide Nanoparticles
molecules-logo
Submit to Special Issue Submit Abstract to Special Issue Review for Molecules Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Synthesis and Characterization of Metal Nanoparticles and Metal Oxide Nanoparticles

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organic Chemistry".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 6095

Special Issue Editors

Dr. Tsz Him Chow

E-Mail Website
Guest Editor
CIC BiomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
Interests: synthesis of metal nanocrystals; properties and applications of plasmonic nanoparticles; nanoplasmonics; nanotechnology
Dr. Henglei Jia

E-Mail Website
Guest Editor
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
Interests: synthesis of metal nanoparticles; symmetry‐breaking synthesis; photocatalysis; electrocatalysis; CO2 reduction; NH3 fixation

Special Issue Information

Dear Colleagues,

Over the past ten years, the synthesis and characterization of metal and metal oxide nanoparticles have matured, leading to significant developments and advances in solar-harvesting applications, optical nanoantennas, surface-enhanced spectroscopy, photocatalysis, biosensing, imaging, etc. Advanced chemical knowledge and strategies in synthesizing metal and metal oxide nanoparticles (e.g., green synthesis, site-selective synthesis, and chiral synthesis) have opened new research fields. Green synthesis uses environmentally friendly organic compounds, such as plant extracts, to overcome the environmental drawbacks of conventional chemical methods for synthesizing metal and metal oxide nanoparticles. Site-selective synthesis enables the construction of spatially separated metal nanoparticles with other components, such as semiconductors, metals, and metal oxides, with intriguing plasmonic properties for various potential applications. Chiral synthesis can be realized based on chirality transfer induced by enantiomeric amino acids and small peptides during the seed-mediated growth over noble metal nanoparticles. With advanced electron tomography and high-resolution scanning transmission electron microscopy imaging, detailed 3D morphology of the nanostructures and atomic-resolution images allow us to observe the morphological evolution of plasmonic nanoparticles and fine surface features, vital to manipulating the plasmonic responses. Advances in synthesizing and characterizing metal nanoparticles will provide many opportunities for developing various practical and commercial applications.

This Special Issue aims to disseminate recent research on synthesizing and characterizing metal and metal oxide nanoparticles and welcome results of related studies regarding the above-mentioned novel synthetic strategies.

Dr. Tsz Him Chow
Dr. Henglei Jia
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. Molecules 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 2700 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

  • green synthesis
  • site-selective growth
  • symmetry-breaking synthesis
  • chiral synthesis
  • plasmonic metal nanoparticles
  • metal oxide nanoparticles
  • noble metal nanocrystals
  • 3D characterization

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

26 pages, 6627 KiB  
Article
Influence of SPION Surface Coating on Magnetic Properties and Theranostic Profile
by Vital Cruvinel Ferreira-Filho, Beatriz Morais, Bruno J. C. Vieira, João Carlos Waerenborgh, Maria João Carmezim, Csilla Noémi Tóth, Sandra Même, Sara Lacerda, Daniel Jaque, Célia T. Sousa, Maria Paula Cabral Campello and Laura C. J. Pereira
Molecules 2024, 29(8), 1824; https://doi.org/10.3390/molecules29081824 - 17 Apr 2024
Viewed by 485
Abstract
This study aimed to develop multifunctional nanoplatforms for both cancer imaging and therapy using superparamagnetic iron oxide nanoparticles (SPIONs). Two distinct synthetic methods, reduction–precipitation (MR/P) and co-precipitation at controlled pH (MpH), were explored, including the assessment of the coating’s [...] Read more.
This study aimed to develop multifunctional nanoplatforms for both cancer imaging and therapy using superparamagnetic iron oxide nanoparticles (SPIONs). Two distinct synthetic methods, reduction–precipitation (MR/P) and co-precipitation at controlled pH (MpH), were explored, including the assessment of the coating’s influence, namely dextran and gold, on their magnetic properties. These SPIONs were further functionalized with gadolinium to act as dual T1/T2 contrast agents for magnetic resonance imaging (MRI). Parameters such as size, stability, morphology, and magnetic behavior were evaluated by a detailed characterization analysis. To assess their efficacy in imaging and therapy, relaxivity and hyperthermia experiments were performed, respectively. The results revealed that both synthetic methods lead to SPIONs with similar average size, 9 nm. Mössbauer spectroscopy indicated that samples obtained from MR/P consist of approximately 11–13% of Fe present in magnetite, while samples obtained from MpH have higher contents of 33–45%. Despite coating and functionalization, all samples exhibited superparamagnetic behavior at room temperature. Hyperthermia experiments showed increased SAR values with higher magnetic field intensity and frequency. Moreover, the relaxivity studies suggested potential dual T1/T2 contrast agent capabilities for the coated SPpH-Dx-Au-Gd sample, thus demonstrating its potential in cancer diagnosis. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Metal Nanoparticles and Metal Oxide Nanoparticles)
►▼ Show Figures

Graphical abstract

14 pages, 5310 KiB  
Article
Biofabrication of Fe3O4 Nanoparticles from Spirogyra hyalina and Ajuga bracteosa and Their Antibacterial Applications
by Muhammad Shakeeb Sharif, Hajra Hameed, Abdul Waheed, Muhammad Tariq, Afshan Afreen, Asif Kamal, Eman A. Mahmoud, Hosam O. Elansary, Saddam Saqib and Wajid Zaman
Molecules 2023, 28(8), 3403; https://doi.org/10.3390/molecules28083403 - 12 Apr 2023
Cited by 37 | Viewed by 2618
Abstract
Iron oxide nanoparticles (NPs) have attracted substantial interest due to their superparamagnetic features, biocompatibility, and nontoxicity. The latest progress in the biological production of Fe3O4 NPs by green methods has improved their quality and biological applications significantly. In this study, [...] Read more.
Iron oxide nanoparticles (NPs) have attracted substantial interest due to their superparamagnetic features, biocompatibility, and nontoxicity. The latest progress in the biological production of Fe3O4 NPs by green methods has improved their quality and biological applications significantly. In this study, the fabrication of iron oxide NPs from Spirogyra hyalina and Ajuga bracteosa was conducted via an easy, environmentally friendly, and cost-effective process. The fabricated Fe3O4 NPs were characterized using various analytical methods to study their unique properties. UV-Vis absorption peaks were observed in algal and plant-based Fe3O4 NPs at 289 nm and 306 nm, respectively. Fourier transform infrared (FTIR) spectroscopy analyzed diverse bioactive phytochemicals present in algal and plant extracts that functioned as stabilizing and capping agents in the fabrication of algal and plant-based Fe3O4 NPs. X-ray diffraction of NPs revealed the crystalline nature of both biofabricated Fe3O4 NPs and their small size. Scanning electron microscopy (SEM) revealed that algae and plant-based Fe3O4 NPs are spherical and rod-shaped, averaging 52 nm and 75 nm in size. Energy dispersive X-ray spectroscopy showed that the green-synthesized Fe3O4 NPs require a high mass percentage of iron and oxygen to ensure their synthesis. The fabricated plant-based Fe3O4 NPs exhibited stronger antioxidant properties than algal-based Fe3O4 NPs. The algal-based NPs showed efficient antibacterial potential against E. coli, while the plant-based Fe3O4 NPs displayed a higher zone of inhibition against S. aureus. Moreover, plant-based Fe3O4 NPs exhibited superior scavenging and antibacterial potential compared to the algal-based Fe3O4 NPs. This might be due to the greater number of phytochemicals in plants that surround the NPs during their green fabrication. Hence, the capping of bioactive agents over iron oxide NPs improves antibacterial applications. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Metal Nanoparticles and Metal Oxide Nanoparticles)
►▼ Show Figures

Figure 1

18 pages, 7758 KiB  
Article
Oscillatoria limnetica Mediated Green Synthesis of Iron Oxide (Fe2O3) Nanoparticles and Their Diverse In Vitro Bioactivities
by Muhammad Haris, Namra Fatima, Javed Iqbal, Wadie Chalgham, Abdul Samad Mumtaz, Mohamed A. El-Sheikh and Maryam Tavafoghi
Molecules 2023, 28(5), 2091; https://doi.org/10.3390/molecules28052091 - 23 Feb 2023
Cited by 15 | Viewed by 2526
Abstract
Iron oxide nanoparticles (Fe2O3-NPs) were synthesized using Oscillatoria limnetica extract as strong reducing and capping agents. The synthesized iron oxide nanoparticles IONPs were characterized by UV-visible spectroscopy, Fourier transform infrared (FTIR), X-ray diffractive analysis (XRD), scanning electron microscope (SEM), [...] Read more.
Iron oxide nanoparticles (Fe2O3-NPs) were synthesized using Oscillatoria limnetica extract as strong reducing and capping agents. The synthesized iron oxide nanoparticles IONPs were characterized by UV-visible spectroscopy, Fourier transform infrared (FTIR), X-ray diffractive analysis (XRD), scanning electron microscope (SEM), and Energy dispersive X-ray spectroscopy (EDX). IONPs synthesis was confirmed by UV-visible spectroscopy by observing the peak at 471 nm. Furthermore, different in vitro biological assays, which showed important therapeutic potentials, were performed. Antimicrobial assay of biosynthesized IONPs was performed against four different Gram-positive and Gram-negative bacterial strains. E. coli was found to be the least suspected strain (MIC: 35 µg/mL), and B. subtilis was found to be the most suspected strain (MIC: 14 µg/mL). The maximum antifungal assay was observed for Aspergillus versicolor (MIC: 27 µg mL). The cytotoxic assay of IONPs was also studied using a brine shrimp cytotoxicity assay, and LD50 value was reported as 47 µg/mL. In toxicological evaluation, IONPs was found to be biologically compatible to human RBCs (IC50: >200 µg/mL). The antioxidant assay, DPPH 2,2-diphenyl-1-picrylhydrazyly was recorded at 73% for IONPs. In conclusion, IONPs revealed great biological potential and can be further recommended for in vitro and in vivo therapeutic purposes. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Metal Nanoparticles and Metal Oxide Nanoparticles)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop