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Metal and Metal Oxide Nanocomposites: From Synthesis to Applications in Biomedical & Environmental Technologies

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 497

Special Issue Editors


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Guest Editor
“Vinča” Institute of Nuclear Sciences, University of Belgrade, 11000 Belgrade, Serbia
Interests: conductive polymers; metal oxide nanoparticles; nanocomposites; photocatalysis; environmental chemistry
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
“Vinča” Institute of Nuclear Sciences, University of Belgrade, 11000 Belgrade, Serbia
Interests: textile fibres; metal nanoparticles; green synthesis; antibacterial properties; environmental chemistry

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the design, synthesis, characterization, and application of metal and metal oxide nanocomposites, with a particular emphasis on their emerging roles in biomedical and environmental technologies. Metal and metal oxide-based nanocomposites exhibit unique physicochemical properties, including a high surface area, tunable optical and electronic features, and exceptional catalytic, antimicrobial, and adsorptive capabilities. These characteristics make them highly suitable for a wide range of applications such as drug delivery, biosensing, imaging, tissue engineering, environmental remediation, and pollutant degradation.

We invite original research articles and reviews that explore novel synthetic strategies, functionalization approaches, structure–property relationships, and practical applications of these nanomaterials. Contributions addressing toxicity, biocompatibility, recyclability, and the development of sustainable processes are also welcome. This Special Issue aims to highlight interdisciplinary advances and foster scientific exchange among researchers working at the intersection of materials science, nanotechnology, chemistry, biology, and environmental science.

Dr. Marija B. Radoičić
Dr. Darka Markovic
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. Molecules 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 2700 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 nanocomposites
  • metal oxide nanocomposites
  • nanomaterials synthesis
  • biomedical applications
  • environmental remediation
  • photocatalysis
  • antimicrobial activity
  • sustainable nanotechnology

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Published Papers (1 paper)

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Research

24 pages, 6846 KB  
Article
Comparative Role of rGO, AgNWs, and rGO–AgNWs Hybrid Structure in the EMI Shielding Performance of Polyaniline/PCL-Based Flexible Films
by Brankica Gajić, Marija Radoičić, Muhammad Yasir, Warda Saeed, Silvester Bolka, Blaž Nardin, Jelena Potočnik, Gordana Ćirić-Marjanović, Zoran Šaponjić and Svetlana Jovanović
Molecules 2025, 30(24), 4693; https://doi.org/10.3390/molecules30244693 - 8 Dec 2025
Viewed by 269
Abstract
The present study explores the comparative influence of reduced graphene oxide (rGO), silver nanowires (AgNWs), and their hybrid rGO–AgNWs on the electromagnetic interference (EMI) shielding performance of polyaniline (PANI)-based flexible films prepared using a polycaprolactone (PCL) matrix. The nanocomposites were synthesized through in [...] Read more.
The present study explores the comparative influence of reduced graphene oxide (rGO), silver nanowires (AgNWs), and their hybrid rGO–AgNWs on the electromagnetic interference (EMI) shielding performance of polyaniline (PANI)-based flexible films prepared using a polycaprolactone (PCL) matrix. The nanocomposites were synthesized through in situ oxidative polymerization of aniline in the presence of individual or hybrid fillers, followed by their dispersion in the PCL matrix and casting of the corresponding films. Morphological and structural characterization (SEM, Raman, and FTIR spectroscopy) confirmed a uniform PANI coating on both rGO sheets and AgNWs, forming hierarchical 3D conductive networks. Thermal (TGA) and thermomechanical (TMA) analyses revealed enhanced thermal stability and stiffness across all composite systems, driven by strong interfacial interactions and restricted polymer chain mobility. Tmax increased from 437.9 °C for neat PCL to 487.9 °C for PANI/PCL, 480.6 °C for PANI/rGO/PCL, 499.4 °C for PANI/AgNWs/PCL and 495.0 °C for the hybrid PANI/rGO–AgNWs/PCL film. The gradual decrease in contact angle following the order PANI/AgNWs/PCL < PANI/rGO–AgNWs/PCL < PANI/rGO/PCL < PANI/PCL < PCL clearly indicates a systematic increase in surface polarity and surface energy with the incorporation of conductive nanofillers. Electrical conductivity reached 60.8 S cm−1 for PANI/rGO/PCL, gradually decreasing to 27.4 S cm−1 for PANI/AgNWs/PCL and 22.1 S cm−1 for the quaternary hybrid film. The EMI shielding effectiveness (SET) measurements in the X-band (8–12 GHz) demonstrated that the PANI/rGO/PCL film exhibited the highest attenuation (~7.2 dB). In contrast, the incorporation of AgNWs partially disrupted the conductive network, reducing SE to ~5–6 dB. The findings highlight the distinct and synergistic roles of 1D and 2D fillers in modulating the electrical, thermal, and mechanical properties of biodegradable polymer films, offering a sustainable route toward lightweight, flexible EMI shielding materials. Full article
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