Order–disorder transformation of intercalated cations triggering huge negative thermal expansion, switchable dielectrics and ion conduction near room temperature in a 2D vanadium oxide hybrid
| Autor: | Hong-Bin Luo, Guo-Qin Zhang, Qiu Ren, Wen-Long Liu, Yin Qian, Xiao-Ming Ren, Jin Zhang, Zhi-Yuan Yao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology General Chemistry Dielectric Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology Thermal conduction 01 natural sciences Thermal expansion Vanadium oxide 0104 chemical sciences Negative thermal expansion Chemical physics Monolayer Materials Chemistry Lamellar structure 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry C. 7:13243-13252 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc04911h |
| Popis: | Zero/negative thermal expansion (ZTE/NTE) materials are significantly desired in many applications; however, it is still a tremendous challenge to theoretically predict and successfully achieve new families of ZTE/NTE materials via rational structural designs. Herein, we present a new low-thermal expansion/NTE material, i.e. a lamellar vanadium oxide hybrid [C3H12N2][V4O10] consisting of mixed-valence {V4O102−}∞ monolayers and propane-1,3-diammonium cations in the interlayers. The inorganic layer is parallel to the (001) plane and comprises edge-sharing VO5 square pyramids linked together via corner-sharing VO4 tetrahedra. The hybrid shows a low thermal expansion coefficient (∼10−6 K−1) in the wide temperature range of 90–250 K and a colossal NTE (∼−600 × 10−6 K−1) between 293 and 330 K. Moreover, a reversible thermal anomaly occurs at ∼328/316 K upon heating/cooling, associated with a structural phase transition, which gives rise to switchable dielectric and ion-conducting properties; this study provides a new method for the exploration of lamellar vanadium oxide hybrids as new low-thermal expansion/NTE, switchable dielectric and ion-conducting multifunctional materials. |
| Databáze: | OpenAIRE |
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