Electrical Switching in Thin Films of Nandi Flame Seed Cuticles

Electrical Switching in Thin Films of Nandi Flame Seed Cuticles

Current-voltage (𝐼-𝑉) characteristics of Nandi flame seed cuticles (NFSCs) have been studied as a function of irradiation, annealing, and poling temperature. The cuticles showed memory and threshold switching. Threshold voltage 𝑉th was about 5 V which is almost five times higher than 𝑉th observed i...

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Main Authors: Wycliffe K. Kipnusu, Gabriel Katana, Charles M. Migwi, I. V. S. Rathore, Joshua R. Sangoro
Format: Article
Language:English
Published: Hindawi Limited 2009-01-01
Series:International Journal of Polymer Science
Online Access:http://dx.doi.org/10.1155/2009/830270
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spelling doaj-7338255b4d3c40b6b45f0ec2dfea3cfa2020-11-24T20:49:06ZengHindawi LimitedInternational Journal of Polymer Science1687-94221687-94302009-01-01200910.1155/2009/830270830270Electrical Switching in Thin Films of Nandi Flame Seed CuticlesWycliffe K. Kipnusu0Gabriel Katana1Charles M. Migwi2I. V. S. Rathore3Joshua R. Sangoro4Physics Department, Kenyatta University, P.O. Box 43844-00100, Nairobi, KenyaPhysics Department, Kenyatta University, P.O. Box 43844-00100, Nairobi, KenyaPhysics Department, Kenyatta University, P.O. Box 43844-00100, Nairobi, KenyaPhysics Department, Kenyatta University, P.O. Box 43844-00100, Nairobi, KenyaInstitute of Experimental Physics 1, University of Leipzig, 04103 Leipzig, GermanyCurrent-voltage (𝐼-𝑉) characteristics of Nandi flame seed cuticles (NFSCs) have been studied as a function of irradiation, annealing, and poling temperature. The cuticles showed memory and threshold switching. Threshold voltage 𝑉th was about 5 V which is almost five times higher than 𝑉th observed in synthetic polymers. The threshold voltage 𝑉th increased to 6–8 V after irradiation and annealing depending on the duration of annealing or irradiation. After switching, conductivity increased by an order of 102. In reverse bias, increase of current was observed and the memory hysteresis loop was at higher conductivity than at the time of switching. Switching effect was minimized at a poling temperature of 370 K. Formation of semiquinones and quinoid radicals from phenolic compounds may have contributed to electrical switching and hysteresis effect.http://dx.doi.org/10.1155/2009/830270
collection DOAJ
language English
format Article
sources DOAJ
author Wycliffe K. Kipnusu
Gabriel Katana
Charles M. Migwi
I. V. S. Rathore
Joshua R. Sangoro
spellingShingle Wycliffe K. Kipnusu
Gabriel Katana
Charles M. Migwi
I. V. S. Rathore
Joshua R. Sangoro
Electrical Switching in Thin Films of Nandi Flame Seed Cuticles
International Journal of Polymer Science
author_facet Wycliffe K. Kipnusu
Gabriel Katana
Charles M. Migwi
I. V. S. Rathore
Joshua R. Sangoro
author_sort Wycliffe K. Kipnusu
title Electrical Switching in Thin Films of Nandi Flame Seed Cuticles
title_short Electrical Switching in Thin Films of Nandi Flame Seed Cuticles
title_full Electrical Switching in Thin Films of Nandi Flame Seed Cuticles
title_fullStr Electrical Switching in Thin Films of Nandi Flame Seed Cuticles
title_full_unstemmed Electrical Switching in Thin Films of Nandi Flame Seed Cuticles
title_sort electrical switching in thin films of nandi flame seed cuticles
publisher Hindawi Limited
series International Journal of Polymer Science
issn 1687-9422
1687-9430
publishDate 2009-01-01
description Current-voltage (𝐼-𝑉) characteristics of Nandi flame seed cuticles (NFSCs) have been studied as a function of irradiation, annealing, and poling temperature. The cuticles showed memory and threshold switching. Threshold voltage 𝑉th was about 5 V which is almost five times higher than 𝑉th observed in synthetic polymers. The threshold voltage 𝑉th increased to 6–8 V after irradiation and annealing depending on the duration of annealing or irradiation. After switching, conductivity increased by an order of 102. In reverse bias, increase of current was observed and the memory hysteresis loop was at higher conductivity than at the time of switching. Switching effect was minimized at a poling temperature of 370 K. Formation of semiquinones and quinoid radicals from phenolic compounds may have contributed to electrical switching and hysteresis effect.
url http://dx.doi.org/10.1155/2009/830270
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