Large Surface Dipole Moments in ZnO Nanorods

被引：36

作者：

Dag, S. ^{[1
]}

Wang, Shuzhi ^{[1
]}

Wang, Lin-Wang ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 06期

关键词：

Dipole moment; nanorod; ab initio; LS3DF; dielectric screening; electric field; ZINC-OXIDE NANOSTRUCTURES; STATES;

D O I：

10.1021/nl200647e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A self-consistent linear scaling three-dimensional fragment (LS3DF) method is used to study the dipole moments and internal electric fields of large ZnO nanorods. Our ab initio calculations reveal that the ZnO nanorod with unpassivated (10 $(1) over bar $0) side surface has a side surface contribution per Zn-O dimer 10 times larger than the bulk contribution per Zn-O bond. Detailed analysis is used to decompose the total dipole moment into different contributions. It is found that the total dipole moment of a nanorod can be calculated from the different parts with their dielectric screening described by a continuous model. We also show the effect of the dipole moment on the interior electronic structure of the nanorod.

引用

页码：2348 / 2352

页数：5

共 43 条

[1] Polarization-based calculation of the dielectric tensor of polar crystals
Bernardini, F
Fiorentini, V
Vanderbilt, D
[J]. PHYSICAL REVIEW LETTERS, 1997, 79 (20) : 3958 - 3961
[2] Dielectric dispersion measurements of CdSe nanocrystal colloids: Observation of a permanent dipole moment
Blanton, SA
Leheny, RL
Hines, MA
GuyotSionnest, P
[J]. PHYSICAL REVIEW LETTERS, 1997, 79 (05) : 865 - 868
[3] Microscopic dielectric response functions in semiconductor quantum dots -: art. no. 236804
Cartoixà, X
Wang, LW
[J]. PHYSICAL REVIEW LETTERS, 2005, 94 (23)
[4] ZnO as a novel photonic material for the UV region
Chen, YF
Bagnall, D
Yao, TF
[J]. MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2000, 75 (2-3): : 190 - 198
[5] Corso A.D., 1994, Phys. Rev. B, V50, P10715
[6] Local structure of condensed zinc oxide -: art. no. 104101
Decremps, F
Datchi, F
Saitta, AM
Polian, A
Pascarelli, S
Di Cicco, A
Itié, JP
Baudelet, F
[J]. PHYSICAL REVIEW B, 2003, 68 (10)
[7] Novel stabilization mechanism on polar surfaces: ZnO(0001)-Zn
Dulub, O
Diebold, U
Kresse, G
[J]. PHYSICAL REVIEW LETTERS, 2003, 90 (01) : 4 - 016102
[8] Zinc oxide nanostructures: Synthesis and properties
Fan, ZY
Lu, JG
[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2005, 5 (10) : 1561 - 1573
[9] Quantized electron states in nearly depleted hexagonal nanowires
Fisker, Christian
Pedersen, Thomas G.
[J]. NANOTECHNOLOGY, 2008, 19 (11)
[10] Density-functional based tight-binding modelling of ZnO structures
Fisker, Christian
Pedersen, Thomas G.
[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2009, 246 (02): : 354 - 360

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