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New Challenges in Thin Films and Nanotechnologies

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 586

Editors


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Guest Editor
Department of Biomedical Systems, Paula Souza State Center for Technological Education, Bauru School of Technology, Bauru 17015-171, Brazil
Interests: sputtering; thin films; raman spectroscopy; X-ray diffraction

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Guest Editor
Laboratório de Plasmas e Processos—LPP, Instituto Tecnológico de Aeronáutica—ITA, São José dos Campos 12228-900, SP, Brazil
Interests: thin film; high pressure; semiconductor; photocatalysis; metal oxide; heterojunction

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Guest Editor
Federal Institute of Amazonas—IFAM, Manaus, Brazil
Interests: photocatalysis; synthesis; semiconductors; nanomaterials

Special Issue Information

Dear Colleagues,

Application trends in nanotechnology, advanced device architectures, and the evolution of functional materials are driving significant progress in modern science. This poses new challenges in the advancement of thin film deposition techniques, as well as the development of precise characterization methodologies. Therefore, this Special Issue aims to present the latest ideas, experimental results, and theoretical models in the field of thin films, from fundamental synthesis and simulation to practical industrial use.

Areas relevant to this Special Issue include, but are not limited to, the deposition and optimization of thin films for high-performance applications, such as electrochemical sensors and Surface-Enhanced Raman Scattering (SERS). We welcome contributions involving the computational simulation of the sputtering process, real-time monitoring using Optical Emission Spectroscopy (OES), and advanced structural analysis using Synchrotron radiation and high-resolution techniques. Furthermore, the integration of artificial intelligence and machine learning for material property prediction, as well as the development of novel coatings for strategic sectors like energy, biotechnology, and optoelectronics, are also key topics of interest.

Dr. Nilton Francelosi Azevedo Neto
Prof. Dr. André L. J. Pereira
Prof. Dr. Francisco Xavier Nobre
Guest Editors

Manuscript Submission Information

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Keywords

  • thin film deposition
  • surface-enhanced raman scattering (SERS)
  • X-ray diffraction (XRD)
  • raman spectroscopy
  • computational simulation and modeling
  • artificial intelligence in materials science
  • synchrotron radiation analysis

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Published Papers (1 paper)

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Research

18 pages, 8691 KB  
Article
Sol–Gel Engineering of Nanostructured MgFe2O4 Ferrite: Tunable Microstructure for Thermochemical Energy Conversion Applications
by Gorakshnath Takalkar and Rahul R. Bhosale
Appl. Sci. 2026, 16(13), 6754; https://doi.org/10.3390/app16136754 - 6 Jul 2026
Viewed by 313
Abstract
This study investigates the synthesis–structure relationships governing sol–gel-derived nanostructured MgFe2O4 ferrite powders for high-temperature thermochemical energy conversion applications. The effects of key processing parameters, including propylene oxide (PO) concentration, gel aging time, calcination temperature, and calcination duration, were systematically examined [...] Read more.
This study investigates the synthesis–structure relationships governing sol–gel-derived nanostructured MgFe2O4 ferrite powders for high-temperature thermochemical energy conversion applications. The effects of key processing parameters, including propylene oxide (PO) concentration, gel aging time, calcination temperature, and calcination duration, were systematically examined to tune the phase composition, specific surface area (SSA), pore volume, crystallite size, and nanoparticle morphology of MgFe2O4. Increasing the PO concentration from 5 to 20 mL shortened the gelation time from 585 to 323 s and increased the SSA from 5.30 to 17.88 m2/g, while the pore volume increased from 0.0074 to 0.0210 cm3/g. In contrast, gel aging time between 24 and 120 h produced negligible changes in SSA, pore volume, and crystallite size, indicating that extended aging is not required for microstructural control. Calcination temperature strongly influenced the nanostructure: increasing the temperature from 600 to 1000 °C decreased SSA and pore volume while increasing crystallite size from 21.33 to 48.76 nm. Longer calcination times produced a similar but less pronounced effect, decreasing SSA from 18.83 to 14.89 m2/g and increasing crystallite size from 17.55 to 30.12 nm. Overall, phase-pure MgFe2O4 with favorable textural properties was obtained using 20 mL of PO, 24 h of aging, and calcination in the 700–800 °C range. Under the identified synthesis conditions, namely 20 mL of PO, 24 h of aging, and calcination in the range of 700–800 °C for 2 h, phase-pure MgFe2O4 nanoparticles with particle sizes of approximately 10–50 nm were obtained. These results establish a processing–microstructure framework for engineering MgFe2O4 nanomaterials with tunable textural properties for solar thermochemical redox cycles and related high-temperature energy applications. Full article
(This article belongs to the Special Issue New Challenges in Thin Films and Nanotechnologies)
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