2026-09-18 ノースカロライナ州立大学（NC State）
＜関連情報＞
- https://news.ncsu.edu/2026/09/extreme-thermal-insulator/
- https://www.science.org/doi/10.1126/sciadv.aee5269
- https://tiisys.com/blog/2024/05/30/post-138294/
剛性層状ハイブリッドペロブスカイトにおける極めて低い熱伝導率 Extremely low thermal conductivity in rigid layered hybrid perovskites
Ziqi Wang, Liang Yan, Ankit Negi, Qingxuan Wang, […] , and Jun Liu
Science Advances Published:18 Sep 2026
DOI:https://doi.org/10.1126/sciadv.aee5269
Abstract
Materials with exceptionally low thermal conductivity are desirable for thermal insulation and waste heat recovery. While foams and aerogels boast ultralow thermal conductivities akin to air, lack of mechanical stiffness in these soft materials necessitates a paradigm shift in materials design that can offer thermal insulation and mechanical rigidity simultaneously. Here, we show that spun-cast layered hybrid organic-inorganic perovskite thin films, azobenzene ethyl ammonium lead iodides, exhibit a record-low thermal conductivity, down to ∼0.04 watts per meter per kelvin at room temperature, while maintaining mechanical rigidity with an elastic modulus of 7.7 gigapascals that surpasses that of most plastics, foams, and aerogels. This unusual combination of ultralow thermal conductivity and high mechanical rigidity is attributed to the specially engineered organic cations in the layered structure. Our finding highlights the potential of molecular engineering in hybrid layered structures to push the extreme of thermal insulation in dense, rigid solids.
