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New hollow nanotube structure designed to convert waste heat into electricity
News30 June 2026

New hollow nanotube structure designed to convert waste heat into electricity

Researchers at POSTECH in South Korea engineered hollow silicon nanotube structures that reduced thermal conductivity by 70% compared to solid silicon nanowires by trapping phonons at near-room temperature. The approach uses abundant silicon compatible with existing semiconductor manufacturing, offering a potential alternative to rare-material-dependent thermoelectric devices for waste heat recovery in data centers, EV batteries, and industrial facilities.