Organic–inorganic nanocomposites (RF/VOX) were prepared by sol–gel method coupled with pyrolysis
treatment using a resorcinol–formaldehyde carbon matrix enriched with vanadium nanoparticles. The
structural properties of the nal product were characterised using X-ray di raction, revealing the
transformation of the incorporated vanadium oxide from the V2O5 phase to V2O3 due to the pyrolysis
temperature in a reductive atmosphere, alongside the formation of vanadium carbide (V8C7) in the
sample treated at 1000 °C. The X-ray analysis also indicated the presence of a graphite phase across all
samples. Microscopic examinations showed macroporous carbon structures enriched with vanadium
oxide in the form of nanowires. These structural features signi cantly in uenced the materials' electrical
properties. At low frequencies, the AC conductance indicated a thermally activated process in the RF/
VOX-625 and RF/VOX-650 samples pyrolysed y at 625 °C and 650 °C, respectively. RF/VOX-625
displayed semiconductor behaviour at high frequencies, while RF/VOX-650 transited from
semiconductor behaviour to metal one at 200 K. The changes in the exponent s suggested that the CBH
model e ectively describes the AC conduction mechanism. Impedance analysis highlighted a relaxation
phenomenon, and Nyquist plots illustrated the contribution of grain and grain boundaries in RF/VOX-625
and RF/VOX-650 at low temperatures. Furthermore, these plots indicated that in RF/VOX-650, the grain
e ect became predominant beyond 200 K. Incorporating vanadium oxide nanoparticles into the
polymer matrix resulted in distinct physical properties and behaviours compared to the original organic
matrix, allowing this material to be tested in various applications including negatronic devices and
electronic components