콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Fabrication of Colloidal Cesium Metal Halide (CsMX: M = Fe, Co, and Ni) Nanoparticles and Assessment of Their Thermodynamic Stability by DFT Calculations
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2022-09
- 저자명 홍기하공동(교신),Kim Sang-Wook,Kwon O-Pil,박상우,박종구,Ryu Jehyeon,Kwon Hyo-Geun
- 학술지명 INORGANIC CHEMISTRY
- 발행처명 AMER CHEMICAL SOC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 7
논문 초록 (Abstract)
We synthesized colloidal cesium metal halide CsMX (M = Fe, Co, Ni; X = Cl, Br) nanoparticles (NPs) and assessed their crystal stability by density functional theory (DFT) calculations. We successfully synthesized Cs3FeCl5, Cs3FeBr5, Cs3CoCl5, Cs3CoBr5, CsNiCl3, and CsNiBr3 NPs. CsMX NPs with Fe and Co exhibited Cs3M1X5 and Cs2M1X4 structures depending on the reaction conditions; however, CsNiX NPs exhibited only the CsNiX3 structure. The differences in structural stability by central metal ions were explained using spin-polarized DFT calculations. The analysis revealed tetragonal Cs3M1X5 and orthorhombic Cs2M1X4 structures to have similar thermodynamic stabilities in the case of Fe and Co, whereas the hexagonal CsMX3 structure in the case of Ni was the most stable. Moreover, the calculation results were the same as the experimental results. In particular, cobalt-related Cs3CoBr5 NPs easily developed into Cs2CoCl4 nanorods with an increase in temperature.
