Sundes Fakher
Single-Walled Carbon-Nanotubes-Based Organic Memory Structures
Fakher, Sundes; Nejm, Razan; Ayesh, Ahmad; AL-Ghaferi, Amal; Zeze, Dagou; Mabrook, Mohammed
Authors
Razan Nejm
Ahmad Ayesh
Amal AL-Ghaferi
Professor Dagou Zeze d.a.zeze@durham.ac.uk
Professor
Mohammed Mabrook
Abstract
The electrical behaviour of organic memory structures, based on single-walled carbon-nanotubes (SWCNTs), metal–insulator–semiconductor (MIS) and thin film transistor (TFT) structures, using poly(methyl methacrylate) (PMMA) as the gate dielectric, are reported. The drain and source electrodes were fabricated by evaporating 50 nm gold, and the gate electrode was made from 50 nm-evaporated aluminium on a clean glass substrate. Thin films of SWCNTs, embedded within the insulating layer, were used as the floating gate. SWCNTs-based memory devices exhibited clear hysteresis in their electrical characteristics (capacitance–voltage (C–V) for MIS structures, as well as output and transfer characteristics for transistors). Both structures were shown to produce reliable and large memory windows by virtue of high capacity and reduced charge leakage. The hysteresis in the output and transfer characteristics, the shifts in the threshold voltage of the transfer characteristics, and the flat-band voltage shift in the MIS structures were attributed to the charging and discharging of the SWCNTs floating gate. Under an appropriate gate bias (1 s pulses), the floating gate is charged and discharged, resulting in significant threshold voltage shifts. Pulses as low as 1 V resulted in clear write and erase states.
Citation
Fakher, S., Nejm, R., Ayesh, A., AL-Ghaferi, A., Zeze, D., & Mabrook, M. (2016). Single-Walled Carbon-Nanotubes-Based Organic Memory Structures. Molecules, 21(9), Article 1166. https://doi.org/10.3390/molecules21091166
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 29, 2016 |
Online Publication Date | Sep 2, 2016 |
Publication Date | Sep 2, 2016 |
Deposit Date | Sep 13, 2016 |
Publicly Available Date | Sep 13, 2016 |
Journal | Molecules |
Publisher | MDPI |
Peer Reviewed | Peer Reviewed |
Volume | 21 |
Issue | 9 |
Article Number | 1166 |
DOI | https://doi.org/10.3390/molecules21091166 |
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Copyright Statement
© 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
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