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Metals
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Metallic Nanomaterials with Biomedical Applications
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Metallic Nanomaterials with Biomedical Applications

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Biobased and Biodegradable Metals".

Deadline for manuscript submissions: closed (30 May 2023) | Viewed by 7847

Special Issue Editor

Dr. Guo Zhao

E-Mail Website
Guest Editor
College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, China
Interests: electroanalytical chemistry; electrochemical sensors and biosensors for heavy metals detection; chemically modified electrodes; nanomaterials for sensing

Special Issue Information

Dear Colleagues,

Recently, with the development of nanotechnology, metallic nanoparticles have been increasingly synthesized and widely exploited for biomedical applications for various demands, especially in biological sensing for the detection of different analytes, such as proteins, toxins, metal ions, nucleotides, anions and saccharides, considering that human health monitoring for early disease condition determination or health disorders is of major clinical importance for maintaining a healthy life. The development of diversified metallic nanomaterials and metallic oxide nanomaterials with unique properties enables them not only to be used for biomedical sensing fields but also to improve the performance capacities of these materials as biomedical sensors. In this Special Issue, we welcome articles that focus on the recent evolution of metallic nanoparticles and metallic oxides with the scope of presenting the state of the art of solutions where metallic nanoparticles have been synthesized for biomedical sensing. The Special Issue also intends to outline the fundamental development trends in the field together with the most recent advances in the use of metallic nanoparticles—synthesis, advanced experimental characterization, material modelling and biomedical applications. All these topics will be covered in this collection of contributions, as will a large assortment of metallic nanoparticles and metallic oxide, including gold, silver, titanium, copper, manganese, zinc and platinum NPs and thier metallic oxide composites, etc., together with their use.

Dr. Guo Zhao
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. Metals 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

  • synthesis and characterization of metallic nanomaterials
  • metallic nanomaterials-based electrochemical sensor and biosensor
  • metallic oxide-midifed electrodes
  • biological sensing based on metallic nanomaterials
  • chemometrics for metallic nanomaterials-based biological sensing
  • metallic nanomaterials-based biological sensing device

Published Papers (4 papers)

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Editorial

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4 pages, 1076 KiB  
Editorial
Metallic Nanomaterials with Biomedical Applications
by Jiali Wang, Guo Zhao, Liya Feng and Shaowen Chen
Metals 2022, 12(12), 2133; https://doi.org/10.3390/met12122133 - 12 Dec 2022
Cited by 1 | Viewed by 1528
Abstract
Metallic nanomaterials have attracted extensive attention in various fields due to their photocatalytic, photosensitive, thermal conducting, electrical conducting and semiconducting properties. Among all these fields, metallic nanomaterials are of particular importance in biomedical sensing for the detection of different analytes, such as proteins, [...] Read more.
Metallic nanomaterials have attracted extensive attention in various fields due to their photocatalytic, photosensitive, thermal conducting, electrical conducting and semiconducting properties. Among all these fields, metallic nanomaterials are of particular importance in biomedical sensing for the detection of different analytes, such as proteins, toxins, metal ions, nucleotides, anions and saccharides. However, many problems remain to be solved, such as the synthesis method and modification of target metallic nanoparticles, inadequate sensitivity and stability in biomedical sensing and the biological toxicity brought by metallic nanomaterials. Thus, this Special Issue aims to collect research or review articles focused on electrochemical biosensing, such as metallic nanomaterial-based electrochemical sensors and biosensors, metallic oxide-modified electrodes, biological sensing based on metallic nanomaterials, metallic nanomaterial-based biological sensing devices and chemometrics for metallic nanomaterial-based biological sensing. Meanwhile, studies related to the synthesis and characterization of metallic nanomaterials are also welcome, and both experimental and theoretical studies are welcome for contribution as well. Full article
(This article belongs to the Special Issue Metallic Nanomaterials with Biomedical Applications)
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Research

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19 pages, 5473 KiB  
Article
Accurate Detection of Cd2+ and Pb2+ Concentrations in Soils by Stripping Voltammetry Peak Areas under the Mutual Interference of Multiple Heavy Metals
by Wenshuai Ye, Ning Liu, Guo Zhao and Gang Liu
Metals 2023, 13(2), 270; https://doi.org/10.3390/met13020270 - 29 Jan 2023
Viewed by 1682
Abstract
The accurate detection of Cd2+ and Pb2+ in soils by square-wave anodic stripping voltammetry (SWASV) faces great challenges because the interaction between multiple heavy metal ions (HMIs) interferes seriously with their SWASV signals. To detect Cd2+ and Pb2+ by [...] Read more.
The accurate detection of Cd2+ and Pb2+ in soils by square-wave anodic stripping voltammetry (SWASV) faces great challenges because the interaction between multiple heavy metal ions (HMIs) interferes seriously with their SWASV signals. To detect Cd2+ and Pb2+ by SWASV with high accuracy, an overlooked but informative signal, i.e., stripping current peak area, was employed and combined with chemometric methods to suppress the above mutual interference. An easy-to-prepare electrode, i.e., in-site electroplating bismuth film modified glassy carbon electrode, was used to sense the multiple HMIs. Two machine learning algorithms, including SVR and PLSR, were used to establish the detection models of Cd2+ and Pb2+. In addition, this study developed a homemade algorithm to automatically acquire the stripping peak heights and stripping peak areas of Zn2+, Cd2+, Pb2+, Bi3+, and Cu2+, which acted as the inputs of machine learning models. Then, the detection performance of various SVR and PLSR models were compared based on the R2 and RMSE values of the validation dataset. Results showed that the SVR detection models established by the algorithmically acquired peak areas presented the best stability and accuracy for detecting both Cd2+ and Pb2+ concentrations under the existence of Zn2+ and Cu2+. The R2 and RMSE values of the SVR models built using the peak heights of HMIs acquired by electrochemical workstation control software (Imanu-SVR) were 0.7650 and 5.3916 μg/L for Cd2+, and 0.8791 and 20.0015 μg/L for Pb2+, respectively; the R2 and RMSE values of the SVR models built using the peak area automatically acquired by the developed algorithm (Aalgo-SVR) were 0.9204 and 2.9906 μg/L for Cd2+, and 0.9756 and 13.1574 μg/L for Pb2+, respectively. More importantly, the detection results of the proposed method in real soil extracts for Cd2+ and Pb2+ concentrations were close to those of ICP-MS, verifying its practicability. This study provides a new solution for the accurate detection of targeted heavy metals under the co-existence of multiple HMIs by the SWASV method. Full article
(This article belongs to the Special Issue Metallic Nanomaterials with Biomedical Applications)
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Graphical abstract

15 pages, 2217 KiB  
Article
Fe3O4 Coated SiO2 Magnetic Nanoparticles for Enhanced Antibacterial Activity and Electrochemical Sensing
by Madhavi, Mukesh Kumar, Jamilur R. Ansari, Vinay Kumar, Sushil Nagar and Ashutosh Sharma
Metals 2022, 12(12), 2145; https://doi.org/10.3390/met12122145 - 14 Dec 2022
Cited by 3 | Viewed by 2105
Abstract
Multifunctional magnetic composite nanoparticles (NPs) with antibiotics have demonstrated symbiotic effects because of their promising antimicrobial properties. The antimicrobial agent reduces side effects and dosage, and increases drug delivery efficiency. In this study, SiO2 coated over Fe3O4 magnetic nanoparticles [...] Read more.
Multifunctional magnetic composite nanoparticles (NPs) with antibiotics have demonstrated symbiotic effects because of their promising antimicrobial properties. The antimicrobial agent reduces side effects and dosage, and increases drug delivery efficiency. In this study, SiO2 coated over Fe3O4 magnetic nanoparticles (MNPs) were prepared by a solvothermal method. The MNPs were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis), and Fourier transform infrared spectroscopy (FTIR). The antimicrobial tests were carried out using the disk diffusion method. The electrochemical sensing was investigated by cyclic voltammetry with varying As(III) concentrations from 1–10 ppb. The microstructural results showed the formation of spherical-shaped Fe3O4@SiO2 MNPs with 15–30 nm diameters. UV-vis results showed that Fe3O4 NPs promote visible light absorption of Fe3O4@SiO2 MNPs because of well-structured and unvarying shell thickness which is beneficial for the absorption of organic dyes. With an increase in the concentration of As(III), there was a shift in potential and an increase in oxidation peak current, showing the electrocatalytic capacity of the modified electrode. The SiO2 deposited on Fe3O4 displayed an admirable microbial operation. These Fe3O4@SiO2 MNPs are easily absorbed by cells and have the potential to influence bacterial cells both within and outside of the cell membrane, making them an intriguing candidate for use in a variety of biological applications in the future. Full article
(This article belongs to the Special Issue Metallic Nanomaterials with Biomedical Applications)
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Review

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31 pages, 6573 KiB  
Review
Nano-Biosensors Based on Noble Metal and Semiconductor Materials: Emerging Trends and Future Prospects
by Liya Feng, Shujia Song, Haonan Li, Renjie He, Shaowen Chen, Jiali Wang, Guo Zhao and Xiande Zhao
Metals 2023, 13(4), 792; https://doi.org/10.3390/met13040792 - 17 Apr 2023
Cited by 5 | Viewed by 1938
Abstract
The aim of this review is to gather current researches into sensors based on noble metal and semiconductor nanomaterials in biomedical detection and elucidate the basic principle and applications of different sorts of semiconductor nanomaterials, i.e., metal oxide NPs, transition metal dichalcogenides (TMDs), [...] Read more.
The aim of this review is to gather current researches into sensors based on noble metal and semiconductor nanomaterials in biomedical detection and elucidate the basic principle and applications of different sorts of semiconductor nanomaterials, i.e., metal oxide NPs, transition metal dichalcogenides (TMDs), metal-organic frameworks (MOFs) and magnetic metal oxide (MMO) NPs. Based on the classifications of nano-biosensors, they can be summarized as electrochemical nano-biosensors, optical nano-biosensors, calorimetric nano-biosensors, and piezoelectric nano-biosensors, wherein, electrochemical and optical nano-biosensors acting as most popular study objects are focused on to excavate the great improvements in excellent sensitivity, selectivity and stability based on fabrication techniques. Full article
(This article belongs to the Special Issue Metallic Nanomaterials with Biomedical Applications)
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