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Micromachines 2019, 10(1), 26; https://doi.org/10.3390/mi10010026

Length-Dependent Electronic Transport Properties of the ZnO Nanorod

1
School of Information Science Technology, Northwest University, Xi’an 710127, China
2
School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China
*
Author to whom correspondence should be addressed.
Received: 23 November 2018 / Revised: 20 December 2018 / Accepted: 27 December 2018 / Published: 31 December 2018
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Abstract

The two-probe device of nanorod-coupled gold electrodes is constructed based on the triangular zinc oxide (ZnO) nanorod. The length-dependent electronic transport properties of the ZnO nanorod was studied by density functional theory (DFT) with the non-equilibrium Green’s function (NEGF). Our results show that the current of devices decreases with increasing length of the ZnO nanorod at the same bias voltage. Metal-like behavior for the short nanorod was observed under small bias voltage due to the interface state between gold and the ZnO nanorod. However, the influence of the interface on the device was negligible under the condition that the length of the ZnO nanorod increases. Moreover, the rectification behavior was observed for the longer ZnO nanorod, which was analyzed from the transmission spectra and molecular-projected self-consistent Hamiltonian (MPSH) states. Our results indicate that the ZnO nanorod would have potential applications in electronic-integrated devices. View Full-Text
Keywords: zinc oxide (ZnO) nanorod; transmission spectrum; transport properties; molecular-projected self-consistent Hamiltonian (MPSH); current–voltage (I–V) curves zinc oxide (ZnO) nanorod; transmission spectrum; transport properties; molecular-projected self-consistent Hamiltonian (MPSH); current–voltage (I–V) curves
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Huang, B.; Zhang, F.; Yang, Y.; Zhang, Z. Length-Dependent Electronic Transport Properties of the ZnO Nanorod. Micromachines 2019, 10, 26.

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