Electronic, Mechanical, and Piezoelectric Properties of ZnO Nanowires

Details Electronic, Mechanical, and Piezoelectric Properties of ZnO Nanowires Electronic, Mechanical, and Piezoelectric Properties of ZnO Nanowires

2005-11-18

arxiv.org/abs/cond-mat/0511473v3

Appl. Phys. Lett. 89, 223111 (2006)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.2397013

Hexagonal [0001] nonpassivated ZnO nanowires are studied with density functional calculations. The band gap and Young's modulus in nanowires which are larger than those in bulk ZnO increase along with the decrease of the radius of nanowires. We find ZnO nanowires have larger effective piezoelectric constant than bulk ZnO due to their free boundary. In addition, the effective piezoelectric constant in small ZnO nanowires doesn't depend monotonously on the radius due to two competitive effects: elongation of the nanowires and increase of the ratio of surface atoms.

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