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Metal Oxide Nanomaterial Properties: Molecular Electrochemistry and Biomedical Applications

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Materials Science".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1897

Special Issue Editors


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Guest Editor
Condensed Matter Department, National Institute for Research and Development in Electrochemistry and Condensed Matter, 1 Plautius Andronescu Street, Timisoara, Romania
Interests: nanomaterials; materials; electrochemistry; electrode materials; nanoporous
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Guest Editor
National Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. P. Podeanu 144, 300569 Timisoara, Romania
Interests: aero-materials; nanomaterials synthesis methods; hydrothermal methods; composite structures; physical chemistry characterization; photocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metal oxide NPs exhibit special structures with improved optical and electronic properties and can form composite materials with other compounds. For example, metal oxide–polymer or biomolecule nanocomposites also exhibit good electrical and optical properties and are of great interest for researchers. These hybrid materials by combining specific properties were used for a wide range of applications in the fields of solar cells, biosensing devices, optoelectronic packaging, biology and biomedical applications for in vivo and in vitro studies, etc. Therefore, for the understanding of physicochemical phenomena, modeling techniques can be used to comprehend the structures and reactivities of molecular and supramolecular systems, interactions between molecules or their interactions with catalytic surfaces, etc. The unique physicochemical properties of metal oxide NPs make it possible to create a wide variety of new biomedical applications. Examples of these metal oxide NPs are titania (TiO2), zinc oxide (ZnO), iron oxides (Fe2O3 and Fe3O4), ceria (CeO2), etc. Most of these materials are biocompatible and safe to be used in humans.

The aim of this Special Issue is to publish high-quality research papers addressing the current and future advances on the achievement, characterization, and application in areas of interest of the metal oxide nanoparticles and metal oxide–polymer or biomolecule nanocomposites with applications in the electrochemical and biomedical fields.

In particular, the topics of interest for this Special Issue include, but are not limited to, the following:

  • Molecular level information about the number of active surface sites and reactivity per site.
  • Studies to understand the interaction mechanisms and identify the functionality of inorganic binding biomolecules.
  • Biofunctional nanostructured materials for biosensing devices and biology and biomedical applications.

Dr. Carmen Lǎzǎu
Dr. Cornelia Bandas
Guest Editors

Manuscript Submission Information

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Keywords

  • inorganic binding biomolecules
  • nanostructured materials
  • metal oxide nanoparticles
  • metal oxide–polymer nanocomposites
  • active surface sites

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Published Papers (2 papers)

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11 pages, 4655 KiB  
Article
Compositional Optimization of Sputtered SnO2/ZnO Films for High Coloration Efficiency
by Zoltán Lábadi, Noor Taha Ismaeel, Péter Petrik and Miklós Fried
Int. J. Mol. Sci. 2024, 25(19), 10801; https://doi.org/10.3390/ijms251910801 - 8 Oct 2024
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Abstract
We performed an electrochromic investigation to optimize the composition of reactive magnetron-sputtered mixed layers of zinc oxide and tin oxide (ZnO-SnO2). Deposition experiments were conducted as a combinatorial material synthesis approach. The binary system for the samples of SnO2-ZnO [...] Read more.
We performed an electrochromic investigation to optimize the composition of reactive magnetron-sputtered mixed layers of zinc oxide and tin oxide (ZnO-SnO2). Deposition experiments were conducted as a combinatorial material synthesis approach. The binary system for the samples of SnO2-ZnO represented the full composition range. The coloration efficiency (CE) was determined for the mixed oxide films with the simultaneous measurement of layer transmittance, in a conventional three-electrode configuration, and an electric current was applied by using organic propylene carbonate electrolyte cells. The optical parameters and composition were measured and mapped by using spectroscopic ellipsometry (SE). Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS) measurements were carried out to check the SE results, for (TiO2-SnO2). Pure metal targets were placed separately from each other, and the indium–tin-oxide (ITO)-covered glass samples and Si-probes on a glass holder were moved under the two separated targets (Zn and Sn) in a reactive argon–oxygen (Ar-O2) gas mixture. This combinatorial process ensured that all the compositions (from 0 to 100%) were achieved in the same sputtering chamber after one sputtering preparation cycle. The CE data evaluated from the electro-optical measurements plotted against the composition displayed a characteristic maximum at around 29% ZnO. The accuracy of our combinatorial approach was 5%. Full article
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36 pages, 12448 KiB  
Review
2D and 3D Nanostructured Metal Oxide Composites as Promising Materials for Electrochemical Energy Storage Techniques: Synthesis Methods and Properties
by Cornelia Bandas, Corina Orha, Mircea Nicolaescu, Mina-Ionela Morariu (Popescu) and Carmen Lăzău
Int. J. Mol. Sci. 2024, 25(23), 12521; https://doi.org/10.3390/ijms252312521 - 21 Nov 2024
Viewed by 571
Abstract
Due to population growth and global technological development, energy consumption has increased exponentially. The global energy crisis opens up many hotly debated topics regarding energy generation and consumption. Not only is energy production in short supply due to limited energy resources but efficient [...] Read more.
Due to population growth and global technological development, energy consumption has increased exponentially. The global energy crisis opens up many hotly debated topics regarding energy generation and consumption. Not only is energy production in short supply due to limited energy resources but efficient and sustainable storage has become a very important goal. Currently, there are energy storage devices such as batteries, capacitors, and super-capacitors. Supercapacitors or electrochemical capacitors can be very advantageous replacements for batteries and capacitors because they can achieve higher power density and energy density characteristics. The evolution and progress of society demand the use of innovative and composite nanostructured metal oxide materials, which fulfill the requirements of high-performance technologies. This review mainly addresses the synthesis techniques and properties of 2D and 3D metal oxide nanostructured materials, especially based on Ti, Fe, Ga, and Sn ions, electrochemical methods used for the characterization and application of 2D, and 3D nanostructured metal oxide structures in electrochemical storage systems of energy. Full article
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