Electro-physical characterization of individual and arrays of ZnO nanowires
Abstract
Capacitance measurements were made on an array of parallel ZnO nanowires embedded in a polymer matrix and provided with two electrodes perpendicular to the nanowires. The capacitance monotonically increased, and saturated at large negative (depleting) and large positive (accumulating) voltages. A qualitative explanation for this behavior is presented, taking into account specific features of quasi-one-dimensional screening. The increasing or decreasing character of the capacitance-voltage characteristics were determined by the conductivity type of the nanowires, which in our case was n-type. A dispersion of the experimental capacitance was observed over the entire frequency range of 1 kHz to 5 MHz. This phenomenon is explained by the slow discharge of the nanowires through the thin dielectric layer that separates them from the top electrode. Separate measurements on individual identical nanowires in a field effect transistor configuration yielded an electron concentration and mobility of approximately 10{sup 17 }cm{sup −3} and 150 cm{sup 2}/Vs, respectively, at room temperature.
- Authors:
-
- Department of Electrical Engineering, University of North Texas, 1155 Union Circle, Denton, Texas 76203 (United States)
- Department of Physics, University of North Texas, 1155 Union Circle, Denton, Texas 76203 (United States)
- Centre for Advanced Nanotechnology, University of Toronto, Toronto M5S 3E3 (Canada)
- Publication Date:
- OSTI Identifier:
- 22490795
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 118; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAPACITANCE; ELECTRIC POTENTIAL; FIELD EFFECT TRANSISTORS; KHZ RANGE 01-100; LAYERS; MHZ RANGE 01-100; NANOWIRES; TEMPERATURE RANGE 0273-0400 K; ZINC OXIDES
Citation Formats
Mallampati, Bhargav, Singh, Abhay, Philipose, U., Shik, Alex, and Ruda, Harry E. Electro-physical characterization of individual and arrays of ZnO nanowires. United States: N. p., 2015.
Web. doi:10.1063/1.4926793.
Mallampati, Bhargav, Singh, Abhay, Philipose, U., Shik, Alex, & Ruda, Harry E. Electro-physical characterization of individual and arrays of ZnO nanowires. United States. https://doi.org/10.1063/1.4926793
Mallampati, Bhargav, Singh, Abhay, Philipose, U., Shik, Alex, and Ruda, Harry E. 2015.
"Electro-physical characterization of individual and arrays of ZnO nanowires". United States. https://doi.org/10.1063/1.4926793.
@article{osti_22490795,
title = {Electro-physical characterization of individual and arrays of ZnO nanowires},
author = {Mallampati, Bhargav and Singh, Abhay and Philipose, U. and Shik, Alex and Ruda, Harry E.},
abstractNote = {Capacitance measurements were made on an array of parallel ZnO nanowires embedded in a polymer matrix and provided with two electrodes perpendicular to the nanowires. The capacitance monotonically increased, and saturated at large negative (depleting) and large positive (accumulating) voltages. A qualitative explanation for this behavior is presented, taking into account specific features of quasi-one-dimensional screening. The increasing or decreasing character of the capacitance-voltage characteristics were determined by the conductivity type of the nanowires, which in our case was n-type. A dispersion of the experimental capacitance was observed over the entire frequency range of 1 kHz to 5 MHz. This phenomenon is explained by the slow discharge of the nanowires through the thin dielectric layer that separates them from the top electrode. Separate measurements on individual identical nanowires in a field effect transistor configuration yielded an electron concentration and mobility of approximately 10{sup 17 }cm{sup −3} and 150 cm{sup 2}/Vs, respectively, at room temperature.},
doi = {10.1063/1.4926793},
url = {https://www.osti.gov/biblio/22490795},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 3,
volume = 118,
place = {United States},
year = {Tue Jul 21 00:00:00 EDT 2015},
month = {Tue Jul 21 00:00:00 EDT 2015}
}