Special Issue "Metal Oxide Nanoparticles and Nanowires: Synthesis, Characterization, and Applications"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 31 March 2021.

Special Issue Editors

Prof. Dr. Seung Hwan Ko
E-Mail Website
Guest Editor
Applied Nano and Thermal Science (ANTS) Lab Department of Mechanical Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea (R.O.K)
Interests: Ag nanowires; Ag nanoparticles; flexible/stretchable electronics; transparent electronics; wearable electronics; Cu nanowires; Cu nanoparticles; laser processing; crack control; soft robot
Prof. Dr. Daeho Lee
E-Mail Website
Guest Editor
Department of Mechanical Engineering, Gachon University, Seongnam, Gyeonggi, Korea (R.O.K)
Tel. +82- 31-750-5518
Interests: Ni-based electronics; NiO nanoparticles; ZnO nanowires; ZnO nanoparticles; CuO nanoparticles; nanoparticle ink, transparent conductors; flexible sensors; laser processing
Special Issues and Collections in MDPI journals
Prof. Dr. Ming-Tsang Lee
E-Mail Website
Guest Editor
National Tsing Hua University, Hsinchu, Taiwan
Interests: solar thermal energy conversion; laser assisted microfabrication; opto-thermal-fluidic coupled systems; micro-/nano-scale heat transfer; sustainable energy devices

Special Issue Information

Dear Colleagues,

Metal oxide nanomaterials are versatile materials. As semiconductors, they are utilized as active materials for various kinds of chemical and physical sensors for detecting gases, chemical species, light, temperature, and bio-species, while reduced or doped metal oxides are applied to electrical and thermal conductors. On the other hand, as metal oxides show either n- or p-type behavior, depending on their own defect structure or doping elements, they are used as active layers of field effect transistors, and carrier transport layers in various types of optoelectronic devices. Furthermore, some metal oxides, such as iron oxides, have magnetic characteristics, and some metal oxides are utilized for battery electrodes. Depending on the synthesis routes, metal oxide nanomaterials have various kinds of morphologies (i.e., nanoparticles, nanowires, and nanoparticle-nanowire hybrid structures), are hence utilized for diverse applications. Moreover, electrical and chemical properties are subjected to the different synthesis methods. 

We kindly invite you to submit a high-quality contribution to this Special Issue of Nanomaterials, “Metal Oxide Nanoparticles and Nanowires: Synthesis, Characterization, and Applications’’. Review and original research articles are all welcome.

Prof. Dr. Seung Hwan Ko
Prof. Dr. Daeho Lee
Prof. Dr. Ming-Tsang Lee
Guest Editors

Manuscript Submission Information

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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 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 2000 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

  • metal oxide
  • nanoparticle
  • nanowire
  • synthesis
  • characterization

Published Papers (3 papers)

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Research

Open AccessArticle
Flexible Free-Standing CuxO/Ag2O (x = 1, 2) Nanowires Integrated with Nanoporous Cu-Ag Network Composite for Glucose Sensing
Nanomaterials 2020, 10(2), 357; https://doi.org/10.3390/nano10020357 - 19 Feb 2020
Abstract
To improve glucose electrocatalytic performance, one efficient manner is to develop a novel Cu-Ag bimetallic composite with fertile porosity and unique architecture. Herein, the self-supported electrode with CuxO/Ag2O (x = 1, 2) nanowires grown in-situ on a nanoporous [...] Read more.
To improve glucose electrocatalytic performance, one efficient manner is to develop a novel Cu-Ag bimetallic composite with fertile porosity and unique architecture. Herein, the self-supported electrode with CuxO/Ag2O (x = 1, 2) nanowires grown in-situ on a nanoporous Cu-Ag network (CuxO/Ag2[email protected]) has been successfully designed by a facile two-step approach. The integrated hierarchical porous structure, the tip-converged CuxO/Ag2O nanowires combined with the interconnected porous conductive substrate, are favorable to provide more reactive sites and improve ions or electrons transportation. Compared with monometallic Cu2O nanowires integrated with nanoporous Cu matrix (Cu2[email protected]), the bimetallic CuxO/Ag2[email protected] composites exhibit the enhanced electrocatalytic performance for glucose. Moreover, the higher sensitivity of ~1.49 mA mM−1 cm−2 in conjunction with a wider linear range of 17 mM for the CuxO/Ag2[email protected] electrode anodized for 10 min are attributed to the synergistic effect of porous structure and bimetallic CuxO/Ag2O nanowires. Particularly, the integrated CuxO/Ag2[email protected] composites possess good flexibility, which has been reported for the first time. Accordingly, the CuxO/Ag2[email protected] with excellent glucose electrocatalytic performance and good flexibility is promising to further develop as a candidate electrode material of glucose sensors. Full article
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Open AccessArticle
Green Synthesized Copper Oxide Nanoparticles Ameliorate Defence and Antioxidant Enzymes in Lens culinaris
Nanomaterials 2020, 10(2), 312; https://doi.org/10.3390/nano10020312 - 12 Feb 2020
Abstract
Biosynthesis of copper oxide nanoparticles (CuONPs) in a cost-effective and eco-friendly way has gained its importance. CuONPs has been prepared from copper sulfate by using Adiantum lunulatum whole plant extract. CuONPs have been characterized by X-ray diffraction, Fourier transform infrared spectroscopic, transmission electron [...] Read more.
Biosynthesis of copper oxide nanoparticles (CuONPs) in a cost-effective and eco-friendly way has gained its importance. CuONPs has been prepared from copper sulfate by using Adiantum lunulatum whole plant extract. CuONPs have been characterized by X-ray diffraction, Fourier transform infrared spectroscopic, transmission electron microscope, etc. Mono-disperse, spherical, pure, and highly stable CuONPs have formed with an average diameter of 6.5 ± 1.5 nm. Biosynthesized CuONPs at different concentrations were applied to seeds of Lens culinaris. Physiological characteristics were investigated in the germinated seeds. Roots obtained from the seeds treated with 0.025 mgmL−1 concentration of CuONPs showed highest activity of different defence enzymes and total phenolics. However, at higher concentration it becomes close to control. It showed gradual increase of antioxidative enzymes, in accordance with the increasing dose of CuONPs. Likewise, lipid peroxidation and proline content gradually increased with the increasing concentration. Reactive oxygen species and nitric oxide generation was also altered due to CuONPs treatment indicating stress signal transduction. Finally, this study provides a new approach of the production of valuable CuONPs, is a unique, economical, and handy tool for large scale saleable production which can also be used as a potent plant defence booster instead of other commercial uses. Full article
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Open AccessArticle
A Convenient Colorimetric Bacteria Detection Method Utilizing Chitosan-Coated Magnetic Nanoparticles
Nanomaterials 2020, 10(1), 92; https://doi.org/10.3390/nano10010092 - 02 Jan 2020
Abstract
An effective novel strategy to detect bacteria is promising because it may improve human health by allowing early diagnosis and timely treatment of bacterial infections. Here, we report a simple, reliable, and economical colorimetric assay using the peroxidase-like activity of chitosan-coated iron oxide [...] Read more.
An effective novel strategy to detect bacteria is promising because it may improve human health by allowing early diagnosis and timely treatment of bacterial infections. Here, we report a simple, reliable, and economical colorimetric assay using the peroxidase-like activity of chitosan-coated iron oxide magnetic nanoparticles (CS-MNPs). When CS-MNPs are incubated with a sample containing bacterial cells such as the gram-negative Escherichia coli or the gram-positive Staphylococcus aureus, the negatively-charged bacterial membrane interacts with positively-charged chitosan on the surface of CS-MNPs, thus resulting in significant reduction of their peroxidase-like activity presumably by a hindrance in the accessibility of the negatively charged substrate, 2-2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) to the positively-charged CS-MNPs. This simple colorimetric strategy allowed the rapid detection of bacterial cells down to 104 CFU mL−1 by the naked eye and 102 CFU mL−1 by spectrophotometry within 10 min. Based on the results, we anticipate that the CS-MNPs-based assay has great potential for the on-site diagnosis of bacterial infections in facility-limited or point-of-care testing (POCT) environments. Full article
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