Interface engineering in honeybee-leg-like TiO2@NiCo2O4 nanocomposites: A novel platform for high-performance microwave absorbers

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dc.contributor.authorKivrak, Burak
dc.contributor.authorKaya, Ismail Cihan
dc.contributor.authorAkyol, Mustafa
dc.contributor.authorAkyildiz, Hasan
dc.date.accessioned2026-02-27T07:33:05Z
dc.date.available2026-02-27T07:33:05Z
dc.date.issued2025
dc.description.abstractThis study reports fabrication of novel TiO2@NiCo2O4 nanocomposites featuring a honeybee-leg-inspired hierarchical architecture, in which radially aligned NiCo2O4 nanoneedles grow on TiO2 fibers to mimic the branched morphology of honeybee legs. This unique architecture generates abundant heterointerfaces and multi-level scattering centers, which directly contribute to enhanced interfacial polarization, impedance matching, and microwave attenuation. The nanocomposites were constructed by electrospinning dual-phase TiO2 nanofibers, followed by the hydrothermal growth of radially aligned NiCo2O4 nanoneedles. Structural and morphological characterization via XRD, SEM, and TEM revealed the formation of a heterostructure with well-defined interfaces. Microwave absorption properties were examined between 2-12 GHz considering reflection loss (RL), impedance matching, complex permittivity and permeability, Cole-Cole plots, Eddy current loss, and attenuation constant. Results demonstrated that the TiO2@NiCo2O4 nanocomposite achieved a minimum reflection loss (RLmin) of-21.30 dB at 9.35 GHz with a 4 mm thickness, and an effective absorption bandwidth (EAB) of 4.27 GHz (7.50-11.77 GHz), covering 94.3 % of the X-band. Additionally, with 5 mm thickness, it reached an RLminof-20.51 dB at 7.31 GHz and an EAB of 3.93 GHz (5.38-9.31 GHz), corresponding to 65.5 % C-band and 32.8 % Xband coverage. These superior absorption capabilities are derived from the bio-inspired hierarchical design, which synergistically integrates dielectric and magnetic losses with morphology-assisted multiple-scattering. The findings demonstrate the significance of bio-inspired design and interface engineering in the development of next-generation high-performance microwave absorbing materials.
dc.description.sponsorshipKonya Technical University Scientific Research Projects (SRP) [232219041]
dc.description.sponsorshipThis work was supported by Konya Technical University Scientific Research Projects (SRP) under project number of 232219041.
dc.identifier.doi10.1016/j.surfin.2025.107839
dc.identifier.issn2468-0230
dc.identifier.urihttp://dx.doi.org/10.1016/j.surfin.2025.107839
dc.identifier.urihttps://hdl.handle.net/20.500.14669/4446
dc.identifier.volume76
dc.identifier.wosWOS:001603956800003
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofSurfaces and Interfaces
dc.relation.publicationcategoryMakale - Uluslararas� Hakemli Dergi - Kurum ��retim Eleman�
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20260302
dc.subjectMicrowave absorption
dc.subjectNanofiber
dc.subjectNanocomposite
dc.subjectNanoneedle
dc.subjectTiO2
dc.titleInterface engineering in honeybee-leg-like TiO2@NiCo2O4 nanocomposites: A novel platform for high-performance microwave absorbers
dc.typeArticle

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