Integrated Computational Framework for UV-Assisted Synthesis, Structural Characterization, and Magneto-Dynamic Oscillatory Behavior of Fe₃O₄/PANI Nanocomposites: From Scherrer Diameter Kinetics to Damped Harmonic Interactions

We present a computational study integrating experimental results from three foundational works on Fe₃O₄/polyaniline (PANI) nanocomposites [1–3] into a unified Python framework with thirteen analytical contributions. Building upon the UV-assisted synthesis protocol by Hildever et al. [3], this work introduces quantitative models for each experimental domain. For structural evolution, an exponential kinetic model calibrated against Scherrer diameters [3] reveals stable behavior at 330 K, contrasting with steeper size reduction at 310 and 350 K (fitted parameters d₀ ≈ 44.4 nm, τ ≈ 406–500 min). For thermal properties, a three-stage Thermogravimetry (TGA) model distinguishes water evaporation, volatile PANI compounds, and chain degradation; polymer content is modeled as a saturation function of UV exposure, reaching 14.61% at the optimal oscillation time (topt = 60 min, 330 K). For magnetic hysteresis, the experimentally reported stability is reproduced via calibrated hyperbolic tangent M(H) loops. Coupling these results to the damped harmonic oscillator (DHO) framework [1,2], the magnetic interaction parameter Δm(H), derived from IRM(H) and DCD(H) protocols, exhibits subcritical oscillations exclusively within the 330 ± 5 K window, yielding a Fourier dominant period T_osc = 0.050 kOe and energy balance ratio Egain/Ediss = 3.55 at t = 60 min. Multivariate analysis across d_XRD, PANI%, A_osc, H_c, and E_gain/E_diss reveals strong Pearson correlations (|r| > 0.90) between polymer incorporation and oscillation amplitude, establishing a quantitative bridge linking the synthesis process and emergent magneto-dynamic response. The framework constitutes a reproducible, data-driven protocol for the design and optimization of UV-synthesized hybrid inorganic–polymer nanocomposites.

References

[1] Hildever, L.; Ferro, T.; Holanda, J. Observation of Damped Oscillations in Chemical-Quantum-Magnetic Interactions. arXiv:2310.15775v1 (2023). https://doi.org/10.48550/arXiv.2310.15775
[2] Celly, G. et al. Observing damped oscillations in the magnetic interactions in Fe3O4/PANI nanostructures. J Mater Sci: Mater Electron 37, 529 (2026). https://doi.org/10.1007/s10854-026-16941-6
[3] Hildever, L.; et al. Exploring the effects of ultraviolet radiation on the properties of Fe3O4/PANI nanostructures. Next Materials 4, 100209 (2024). https://doi.org/10.1016/j.nxmate.2024.100209