scholarly journals Влияние переходных металлов IIIВ-группы на формирование замкнутых германиевых кластеров: компьютерный эксперимент в рамках теории функционала плотности

Author(s):  
Nadezda A. Borshch ◽  
Sergey I. Kurganskii

Представлены результаты моделирования пространственной структуры и электронных свойств кластеров MeGe16 - и MeGe20 - (Me = Sc, Y, Lu). Рассматривается возможность синтеза  пуллереноподобных кластеров и кластеров с другими типами замкнутых структур. Проведены сравнительные расчеты в рамках теории функционала плотности с использованием базиса SDD и трех различных потенциалов – B3LYP, B3PW91 и PBEPBE. Анализируется влияние выбора потенциала на результаты моделирования пространственной структуры кластеров и их электронного спектра. Оценка адекватности теоретических методов проводится путем сравнения рассчитанных электронных спектров с экспериментальными результатами по фотоэлектронной спектроскопии кластеров.     REFERENCES Kroto H. W., Heath J. R., O’Brien S. C., Curl R. F., Smalley R. E. C60: Buckminsterfullerene. Nature, 1985, v. 318, pp. 162-163. https://doi.org/10.1038/318162a0 Hiura H., Miyazaki, Kanayama T. Formation of Metal-Encapsulating Si Cage Clusters. Phys. Rev. Lett., 2001, v. 86, p. 1733. https://doi.org/10.1103/PhysRev-Lett.86.1733 Wang J., Han J. Geometries, stabilities, and electronic properties of different-sized ZrSin (n=1–16) clusters: A density-functional investigation. Chem. Phys., 2005, v. 123(6), pp. 064306–064321. https://doi.org/10.1063/1.1998887 Guo L.-J., Liu X., Zhao G.-F. Computational investigation of TiSin (n=2–15) clusters by the densityfunctional theory. Chem. Phys., 2007, v. 126(23), pp. 234704–234710.  https://doi.org/10.1063/1.2743412 Li J., Wang G., Yao C., Mu Y., Wan J., Han M. Structures and magnetic properties of SinMn (n=1–15) clusters. Chem. Phys., 2009, v. 130(16), pp. 164514–164522.  https://doi.org/10.1063/1.3123805 Borshch N. A., Berestnev K. S., Pereslavtseva N. S., Kurganskii S. I. Geometric structure and electron spectrum of YSi n− clusters (n = 6–17) Physics of the Solid State, 2014, v. 56(6), pp. 1276–1281. https://doi.org/10.1134/S1063783414060080 Borshch N., Kurganskii S. Geometric structure, electron-energy spectrum, and growth of anionic scandium-silicon clusters ScSin- (n = 6–20). Appl. Phys., 2014, v. 116(12), pp. 124302-1 – 124302-8. https://doi.org/10.1063/1.4896528 Borshch N. A., Pereslavtseva N. S., Kurganskii S. I. Spatial structure and electronic spectrum of TiSi n - Clusters (n = 6–18). Russian Journal of Physical Chemistry A, v. 88(10), pp. 1712–1718. https://doi.org/10.1134/S0036024414100070 Borshch N. A., Pereslavtseva N. S., Kurganskii S. I. Spatial and electronic structures of the germanium-tantalum clusters TaGe n − (n = 8–17). Physics of the Solid State, 2014, vol. 56(11), pp. 2336–2342. https://doi.org/10.1134/S1063783414110055 Huang X., Yang J. Probing structure, thermochemistry, electron affi nity, and magnetic moment of thulium-doped silicon clusters TmSi n (n = 3–10) and their anions with density functional theory. Mol. Model., 2018, v. 24(1), p. 29. https://doi.org/10.1007/s00894-017-3566-7 Zhang, Y., Yang, J., Cheng, L. J. Probing Structure, Thermochemistry, Electron Affi nity and Magnetic Moment of Erbium-Doped Silicon Clusters ErSin (n = 3–10) and Their Anions with Density Functional Theory. Sci., 2018, v. 29(2), pp. 301–311. https://doi.org/10.1007/s10876-018-1336-z Ye T., Luo C., Xu B., Zhang S., Song H., Li G. Probing the geometries and electronic properties of charged Zr2Si n q (n = 1–12, q = ±1) clusters. Chem., 2018, v. 29(1), pp. 139–146.  https://doi.org/10.1007/s11224-17-1011-2 Nguyen M.T., Tran Q. T., Tran V.T. A CASSCF/ CASPT2 investigation on electron detachments from ScSi n − (n = 4–6) clusters. Mol. Model., 2017, v. 23(10), p. 282. https://doi.org/10.1007/s00894-017-3461-2 Liu Y., Jucai Yang J., Cheng L. Structural Stability and Evolution of Scandium-Doped Silicon Clusters: Evolution of Linked to Encapsulated Structures and Its Infl uence on the Prediction of Electron Affi nities for ScSin (n = 4–16) Clusters. Chem., 2018, v. 57(20), pp 12934–12940. https://doi.org/10.1021/acs.inorgchem.8b02159

2006 ◽  
Vol 05 (01) ◽  
pp. 13-21 ◽  
Author(s):  
YING DAI ◽  
BAIBIAO HUANG ◽  
LIN YU ◽  
SHENGHAO HAN ◽  
DADI DAI

We have studied the effects of surface oxygen and its bond structure on the electronic properties of silicon nanoclusters by means of density functional theory calculations. The results of the energy gap as a function of the nanocluster size in hydrogen-terminated and oxygen-adsorbed silicon clusters provide a well interpretation of several experiments. The nature of electronic and optical properties of silicon nanoclusters has been discussed and attributed to the oxygen in both the Si=O double bond structure and Si–O–Si bridge structure.


2018 ◽  
Vol 6 (48) ◽  
pp. 13241-13249 ◽  
Author(s):  
Xiaoyu Ma ◽  
Dahu Chang ◽  
Chunxiang Zhao ◽  
Rui Li ◽  
Xiaoyu Huang ◽  
...  

The geometric structure and electronic properties of Bi2X2Y (X, Y = O, S, Se, and Te) ternary compound have been studied by means of first-principles density functional theory.


2014 ◽  
Vol 1048 ◽  
pp. 369-372
Author(s):  
Shuai Qin Yu ◽  
Hong Nan Ye

Geometric structures of Fe6-xSix(x=1-5) clusters have been systematically studied at the BPW91 level by density-functional theory (DFT). Calculated results show that the Fe atoms of the lowest-energy structures of Fe6-xSix clusters tend to go together, and Si atoms tend to occupy surface site bonding with iron atoms as many as possible. Further, we analyze the stability of the lowest-energy structures of Fe6-xSix clusters, and the corresponding results of the HOMO, LUMO as well as the HOMO-LUMO energy gap show that the Fe5Si and Fe4Si2 clusters have special stability.


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