Fig. 1. (a) Sketch of evaporation-condensation method; (b) photo of stable molten zone.(a) 蒸发冷凝实验示意图; (b)形成稳定熔区照片

Fig. 2. (a), (b) FESEM image of precursor powder CeB₆ and SmB₆; (c), (d) FESEM image of CeB₆ and SmB₆ nanocrystals prepared by evaporation condensation; (e), (f) XRD spectra of CeB₆ and SmB₆ nanocrystals prepared by evaporation condensation. (a)和(b)原料CeB₆和SmB₆粗粉的FESEM照片; (c)和(d)蒸发冷凝法制备的纳米CeB₆和SmB₆的FESEM照片; (e)和(f)为纳米CeB₆和SmB₆的XRD图谱

Fig. 3. (a) TEM image of nanocrystalline CeB₆; (b) HRTEM image, (c) fast Fourier transform pattern, (d) HAADF-STEM, and (e), (f) elemental distribution of Ce and B for single particle of nanocrystalline CeB₆. (a) 纳米CeB₆的TEM照片; 单颗粒纳米CeB₆的(b) HRTEM照片、(c) 快速傅里叶变换照片、(d) HAADF-STEM分析, 以及相应(e), (f) Ce和B的元素分布照片

Fig. 4. (a), (c) HRTEM images of nanocrystalline CeB₆ and SmB₆; (b), (d) inverse fast Fourier transform image of nanocrystalline CeB₆ and SmB₆. (a), (c) 纳米CeB₆和SmB₆的HRTEM照片; (b), (d) 反快速傅里叶照片

Fig. 5. Optical absorption spectra of nanocrystalline CeB₆ and SmB₆. 纳米CeB₆和SmB₆光吸收图谱

Fig. 6. First-principle calculation results of band structure: (a) CeB₆; (b) SmB₆. 第一性原理计算能带结构图　(a) CeB₆; (b) SmB₆

Fig. 7. First-principle calculation results of total density of states (TDOS) and partial density of states (PDOS) curves: (a) CeB₆; (b) SmB₆. 第一性原理计算态密度曲线　(a) CeB₆; (b) SmB₆

Fig. 8. Energy loss function curves of (a) CeB₆ and (b) SmB₆. (a) CeB₆和(b) SmB₆的能量损失函数曲线

Fig. 9. First principle calculation results of optical absorption curves: (a) CeB₆; (b) SmB₆. 第一性原理计算光吸收曲线　(a) CeB₆; (b) SmB₆