The ground state structure and properties of FeGen0/-(n=4-16)clusters were studied by using global search technique combined with density functional theory(TPSSh).The results show that the anion cluster growth mode is:when n≤8,it is a substituent structure;when n=9,the cluster forms a half cage structure;when n≥10,it is a cage structure.The growth mode of neutral clusters is the same as that of anionic clusters.Based on the determination of the ground state structure,the photoelectron spectroscopy(PES)of the anion cluster FeGen-(n=4-16)was further simulated,and the average bond energy(Eb),the second order energy difference(Δ2E),the HOMO-LUMO energy gap(Egap),and the natural layout analysis(NPA)of the cluster were calculated.The results show that FeGe10 and FeGe15-clusters have excellent thermodynamic stability and chemical stability,which can be used as the most appropriate units of new nano functional materials.
关键词
基态构型/光电子能谱/相对稳定性
Key words
ground state configuration/photoelectron spectroscopy/relative stability