Imaging the Thermal Hysteresis of Single Spin-Crossover Nanoparticles
| Autor: | Hong-Yuan Chen, Kai Zhou, Wei Wang, Shasha Liu, Xin-Yi Wang, Tinglian Yuan, Wenrui Lei |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed matter physics
Chemistry Transition temperature Nanophotonics Spin transition Nanoparticle General Chemistry 010402 general chemistry Magnetic hysteresis 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Hysteresis Colloid and Surface Chemistry Spin crossover Surface plasmon resonance |
| Zdroj: | Journal of the American Chemical Society. 142(37) |
| ISSN: | 1520-5126 |
| Popis: | The magnetic hysteresis property during the spin transition of spin-crossover (SCO) materials holds great promise for their applications in spin electronics, information storage, thermochromic, and nanophotonic devices. Existing studies often measured the averaged property of a bulk sample consisting of lots of individuals. When considering the significant heterogeneity among different individuals and the inevitable interparticle interactions, ensemble measurement not only blurred the structure-property relationship but also compromised the intrinsic hysteresis property and cyclability. Herein, we employed a recently developed surface plasmon resonance microscopy (SPRM) method to measure the thermal hysteresis curve of single isolated SCO nanoparticles. The thermal-induced spin transition was found to alter the optical contrast of single SCO nanoparticles, which was optically readout using SPRM in a quantitative, nonintrusive, and high-throughput manner. Single nanoparticle measurements revealed an intrinsic transition temperature that was independent of the temperature scan rate and superior stability after over 11 000 cycles of single SCO nanoparticles. Correlations between the hysteresis and the size and morphology of the same individuals further uncovered the significant nanoparticle-to-nanoparticle heterogeneity with implications for the size-property relationship and rational design of SCO materials with improved performance. |
| Databáze: | OpenAIRE |
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