Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds

Metal-sample-metal sandwich configuration has been used to investigate DC conductivity in 4 𝜇m thick Nandi flame [Spathodea campanulata P. Beauv.] seed cuticles. 𝐽-𝑉 characteristics showed ohmic conduction at low fields and space charge limited current at high fields. Charge mobility in ohmic region...

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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: Wiley 2009-01-01
Series:International Journal of Biomaterials
Online Access:http://dx.doi.org/10.1155/2009/548406
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author Wycliffe K. Kipnusu
Gabriel Katana
Charles M. Migwi
I. V. S. Rathore
Joshua R. Sangoro
author_facet Wycliffe K. Kipnusu
Gabriel Katana
Charles M. Migwi
I. V. S. Rathore
Joshua R. Sangoro
author_sort Wycliffe K. Kipnusu
collection DOAJ
description Metal-sample-metal sandwich configuration has been used to investigate DC conductivity in 4 𝜇m thick Nandi flame [Spathodea campanulata P. Beauv.] seed cuticles. 𝐽-𝑉 characteristics showed ohmic conduction at low fields and space charge limited current at high fields. Charge mobility in ohmic region was 4.06×10−5(m2V−1s−1). Temperature-dependent conductivity measurements have been carried out in the temperature range 320 K <𝑇> 450 K. Activation energy within a temperature of 320 K–440 K was about 0.86 eV. Variable range hopping (VRH) is the main current transport mechanism at the range of 330–440 K. The VRH mechanism was analyzed based on Mott theory and the Mott parameters: density of localized states near the Fermi-level N(𝐸𝐹)≈9.04×1019(eV−1cm−3) and hopping distance 𝑅≈1.44×10−7 cm, while the hopping energy (𝑊) was in the range of 0.72 eV–0.98 eV.
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institution Kabale University
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publishDate 2009-01-01
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series International Journal of Biomaterials
spelling doaj-art-3618ccb465424a92a83529a8ca369b6f2025-02-03T07:24:42ZengWileyInternational Journal of Biomaterials1687-87871687-87952009-01-01200910.1155/2009/548406548406Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame SeedsWycliffe 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 I, University of Leipzig, 04103 Leipzig, GermanyMetal-sample-metal sandwich configuration has been used to investigate DC conductivity in 4 𝜇m thick Nandi flame [Spathodea campanulata P. Beauv.] seed cuticles. 𝐽-𝑉 characteristics showed ohmic conduction at low fields and space charge limited current at high fields. Charge mobility in ohmic region was 4.06×10−5(m2V−1s−1). Temperature-dependent conductivity measurements have been carried out in the temperature range 320 K <𝑇> 450 K. Activation energy within a temperature of 320 K–440 K was about 0.86 eV. Variable range hopping (VRH) is the main current transport mechanism at the range of 330–440 K. The VRH mechanism was analyzed based on Mott theory and the Mott parameters: density of localized states near the Fermi-level N(𝐸𝐹)≈9.04×1019(eV−1cm−3) and hopping distance 𝑅≈1.44×10−7 cm, while the hopping energy (𝑊) was in the range of 0.72 eV–0.98 eV.http://dx.doi.org/10.1155/2009/548406
spellingShingle Wycliffe K. Kipnusu
Gabriel Katana
Charles M. Migwi
I. V. S. Rathore
Joshua R. Sangoro
Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
International Journal of Biomaterials
title Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
title_full Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
title_fullStr Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
title_full_unstemmed Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
title_short Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
title_sort charge transport mechanism in thin cuticles holding nandi flame seeds
url http://dx.doi.org/10.1155/2009/548406
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