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Nanomaterials
Special Issues
Magnetic and Dielectric Properties of Nanoscale Materials
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Magnetic and Dielectric Properties of Nanoscale Materials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 1405

Special Issue Editor

Dr. Gongwen Gan

E-Mail Website
Guest Editor
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Interests: magnetic materials; dielectric materials; nanoscale ceramics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Realizing the miniaturization, integration, and excellent performance of modern communication devices or systems is difficult. Nano-scale magnetic and dielectric materials have received extensive attention due to their unique magnetic, dielectric, loss, and high-frequency properties.

This Special Issue of Nanomaterials is aimed at presenting the current state-of-the-art in the use of nanoparticles in nano-scale magnetic and dielectric materials, a field that has developed for decades due to the success of the electronics industry. Magnetic and dielectric materials can be regulated by doping, substitution or novel means. So, in the present Special Issue, we have invited contributions from leading groups in the field with the aim of giving a balanced view of the current state-of-the-art in this discipline.

This Special Issue aims to spotlight research on the magnetic and dielectric properties of nanoscale and related materials. We are pleased to invite you to submit papers or issues related to magnetic and dielectric nanomaterials and their related structure, properties, processing, and application.

Dr. Gongwen Gan
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. Nanomaterials 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 2900 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

  • nanoscale ceramics
  • ferrites
  • magnetic properties
  • dielectric properties
  • microstructure
  • low loss
  • high frequency

Published Papers (1 paper)

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Research

13 pages, 6097 KiB  
Article
Investigation of Structural, Dielectric and Optical Properties of Polyaniline—Magnesium Ferrite Composites
by Priyanka Kolhar, Basavaraja Sannakki, Meenakshi Verma, Siddaramappa Suresha, Mansoor Alshehri and Nehad Ali Shah
Nanomaterials 2023, 13(15), 2234; https://doi.org/10.3390/nano13152234 - 2 Aug 2023
Cited by 3 | Viewed by 1216
Abstract
A study on the influence of magnesium ferrite nanoparticles on the optical and dielectric attributes of Polyaniline has been conducted. Magnesium nano Ferrite powder is synthesized by the self-propagating solution combustion method. Polyaniline–Magnesium nano ferrite composites are synthesized by chemical oxidative polymerization of [...] Read more.
A study on the influence of magnesium ferrite nanoparticles on the optical and dielectric attributes of Polyaniline has been conducted. Magnesium nano Ferrite powder is synthesized by the self-propagating solution combustion method. Polyaniline–Magnesium nano ferrite composites are synthesized by chemical oxidative polymerization of aniline with the addition of Magnesium nanoparticles. The samples are characterized with XRD and UV-Vis spectrometer, in the wavelength range of 200–800 nm and studied for optical properties. Dielectric properties are studied in the frequency range of 50 Hz to 5 MHz. X-ray diffraction reveals single phase formation of Magnesium ferrite, whereas Polyaniline shows an amorphous nature. In the XRD of the composites, we see the crystalline peaks of ferrite becoming more intense with the addition of ferrite and whereas the peak of Polyaniline diminishes. The crystallite size is quantified with the Debye—Scherrer formula, and it increases as the content of ferrite in the composites increases. The micro-strain decreases in the composites as the percentage of ferrite enhances in the composites. In the UV-Vis absorption spectra of composites, the peaks of Polyaniline shift to higher wavelength and there is also an absorption band in the spectra of composites corresponding to that of Magnesium ferrite particles. Both direct and indirect band gaps are calculated with the Tauc plot, and both the optical band gap decrease as the percentage of ferrite increases in the composite. The dielectric loss and dielectric constant both decrease with frequency in all the samples, and the dielectric response are in good agreement with Maxwell—Wagner model. Ferrite—polymer composites with both conducting and magnetic properties are considered useful for electromagnetic shielding and microwave absorption. Full article
(This article belongs to the Special Issue Magnetic and Dielectric Properties of Nanoscale Materials)
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