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运用密度泛函理论下的广义梯度近似和交换关联函数对Cu吸附(SiO2)n(n=1—8)团簇的几何结构、电荷分布、稳定性和电子性质进行了较详细的研究,结果表明: Cu原子易于和带有悬挂键的Si原子作用并形成"铜岛膜"; Cu吸附(SiO2)n团簇后Si原子失去电子能力减弱,O原子得到电子能力增强;Cu(SiO2)n(n
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关键词:
- 密度泛函理论 /
- Cu(SiO2)n (n=1—8)团簇 /
- 近红外吸收
Equilibrium geometries, charge distributions, stabilities, and electronic properties of the Cu-adsorbed (SiO2)n (n=1—8) clusters are investigated by using the density functional theory in the generalized gradient approximation for exchange-correlation functional. The results show that the Ag atom preferably binds to silicon atom with dangling bond, and the incoming Ag atoms tend to cluster on the existing Ag cluster leading to the formation of Ag islands. Therefore the ability for Si to lose electron is weaker, while the ability for Si to gain electron is stronger. In addition, the energy gaps between the highest occupied and the lowest unoccupied molecular orbitals remarkably decrease compared with the pure (SiO2)n (n=1—8) clusters, eventually approaching the near infrared radiation region.-
Keywords:
- DFT /
- Cu(SiO2)n (n=1—8) /
- near infrared absorption
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[33] Brongersma M 2003 Nat. Mater. 2 296
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[43] Song J, Choi M 2002 Phys. Rev. B 65 241302
[44] Erkoc S 2003 Chem. Phys. Lett. 369 605
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[1] Helms D L 1969 Elements of Physical Geology (New York: Ronald)
[2] Helms C R, Deal B E 1988 The Physics and Chemistry of SiO2 and the Si-SiO2 Interface (New York: Plenum)
[3] 234705
[4] Salleo A, Taylor S T, Martin M C, Panero W R, Jeanloz R, Sands T, Genin, F Y 2003 Nat. Mater. 2 796
[5] Che S, Garcia-Bennett A E, Yokoi T, Sakamoto K, Kunieda H, Terasaki O, Tatsumi T 2003 Nat. Mater. 2 801
[6] Suzuki K, Ikari K, Imai H 2004 J. Am. Chem. Soc. 126 462
[7] Harkless J A, Stilinger D K, Stillinger F H 1996 J. Phys. Chem. 100 1098
[8] Li S, Silvers S J, El-Shall M S 1997 J. Phys. Chem. B 101 1794
[9] Wang L S, Nicholas J B, Dupuis M, Wu H, Colson S D 1997 Phys. Rev. Lett. 78 4450
[10] Liu X, Zhao G F, Guo L J, Wang X W, Zhang J, Jing Q, Luo Y H 2007 Chin. Phys. 16 3359
[11] Liu Y Z, Luo C L 2004 Acta Phys. Sin. 53 592 (in Chinese) [刘玉真、 王成林 2004 53 592]
[12] Zhang C R, Chen Y H, Wang D B, Wu Y Z, Chen H S 2008 Chin. Phys. B 17 2938
[13] Li B, Yang C L, Qi K T, Zhang Y, Sheng Y 2009 Acta Phys. Sin. 58 3104 (in Chinese) [李 兵、杨传路、齐凯天、张 岩、盛 勇 2009 58 3104]
[14] Sanchez A, Abbet S, Heiz U, Schneider W D, Hakkinen H, Barnett R N, Landman U 1999 J. Phys. Chem. A 103 9573
[15] Fayet P, Granzer F, Hegenbart G, Moisar E, Pischel B, Wste L 1985 Phys. Rev. Lett. 55 3002
[16] Lopez N, Illas F, Pacchioni G 1999 J. Phys. Chem. B 103 1712
[17] Kuk Y, Kim D K, Suh Y D, Park K H, Noh H P, Oh S J, Kim S K 1993 Phys. Rev. Lett. 70 1948
[18] Ohno T R, Chen Y, Harvey S E, Kroll G H, Benning P J, Weaver J H, Chibante L P F, Smalley R E 1993 Phys. Rev. B 47 2389
[19] Rowe J E, Rudolf P, Tjeng L H, Malic R A, Meigs G, Chen C T, Chen J, Plummer W 1992 Int. J. Mod. Phys. B 6 3909
[20] Owens D, Aldao C, Poirier D, Weaver J 1995 Phys. Rev. B 51 17068
[21] Hebard A F, Ruel R R, Eom C B 1996 Phys. Rev. B 54 14052
[22] Dunn A W, Cotier B N, Nogaret A, Moriaty P, Beton P H 1997 Appl. Phys. Lett. 71 2937
[23] Yang G, Wang W, Yan L, Lu H, Yang G, Chen Z 2002 Opt. Commun. 209 445
[24] Kreibig V, Vollmer M 1995 Optical Properties of Metal Clusters (New York: Springer-Verlag Berlin Heidelberg)
[25] Mazzoldi P, Arnold G W, Battaglin G., Gonella F, Haglund R F 1996 J. Nonlinear Opt. Phys. Mater. 5 285
[26] Lee M, Kim T S, Choi Y S 1997 J. Non-Cryst. Solids 211 143
[27] Compagnini G, Scalisi A A, Puglisi O 2002 Phys. Chem. Chem. Phys. 4 2787
[28] Kppe R, Schackel H 1992 Heteroat. Chem. 3 329
[29] Mehner T, Schnckel H, Jouany C, Gadea F X, Barthelat J C 1992 Heteroat. Chem. 3 333
[30] Chenier J H B, Howard J A, Joly H A, Mile B, Timms P L 1990 J. Chem. Soc., Chem. Commun. 1990 581
[31] Howard J A, Jones R, Tse J S, Tomietto M, Timms P L, Seely A J 1992 J. Phys. Chem. 96 9144
[32] Hirsch L R, Stafford R J, Bankson J A, Sershen S R, Rivera B, Price R E, Hazle J D, Halas N J, West J L 2003 Proc. Natl. Acad. Sci. U. S. A. 100 13549
[33] Brongersma M 2003 Nat. Mater. 2 296
[34] Hirsch L R, Jackson J B, Lee A, Halas N J 2003 Anal. Chem. 75 2377
[35] Sun Q, Wang Q, Rao B K, Jena P 2004 Phys. Rev. Lett. 93 186803
[36] Zhao G F, Zhi L L, Guo L J, Zeng Z 2007 J. Chem. Phys. 127
[37] Huberg K P, Herzberg G 1989 Molecular Spectra and Molecular Structure-Ⅳ (New York: Van Nostrand-Reinhold)
[38] Scherer J J, Paul J B, Collier C P, Saykally R J 1995 J. Chem. Phys. 102 5190
[39] Lide D R 2000 CRC Handbook of Chemistry and Physics (New York: CRC)
[40] Nayak S K, Rao B K, Khanna S N, Jena P 1998 J. Chem. Phys. 109 1245
[41] Bromley S T, Zwijnenburg M A, Maschmeyer T 2003 Phys. Rev. Lett. 90 035502
[42] Sun Q, Wang Q, Jena P 2004 Phys. Rev. Lett. 92 039601
[43] Song J, Choi M 2002 Phys. Rev. B 65 241302
[44] Erkoc S 2003 Chem. Phys. Lett. 369 605
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