Geometry-driven plasmonic heating in Bi₂Te₃ nanostructures: Intrinsic surface plasmons enable enhanced thermoelectric voltage [DATASET]

Plasmonic heating in geometrically optimized bismuth telluride (Bi₂Te₃) nanostructures enables efficient thermoelectric energy harvesting by reducing interfacial losses compared to metal nanoparticle-dependent systems. This Dataset is from this study in which we demonstrate that 3D Bi₂Te₃ nanowire networks, fabricated via template-assisted electrochemical deposition, achieve a localized temperature rise of 14 °C under 650 nm illumination, which is twice the heating obtained in 1D nanowire arrays and three times higher than Bi₂Te₃ films, through intrinsic plasmonic resonance. Raman thermometry and wavelength-dependent analysis reveal that this geometric enhancement correlates with a 250 % increase in thermoelectric voltage output compared to conventional designs. By leveraging Bi₂Te₃’s dual functionality as a topological insulator and plasmonic material, our work establishes a scalable, cost-effective platform for advanced energy harvesting devices, with immediate applications in wearable IoT systems and sustainable thermal management technologies.