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dc.contributor.authorBadis, Bendjemil
dc.date.accessioned2009-09-03T01:49:52Z
dc.date.available2009-09-03T01:49:52Z
dc.date.issued2009
dc.identifier.citationInternational Journal of Nanoelectronics and Materials, vol.2 (2), 2009, pages 173-182.en_US
dc.identifier.issn1985-5761 (Printed)
dc.identifier.issn1997-4434 (Online)
dc.identifier.urihttp://dspace.unimap.edu.my/123456789/7117
dc.descriptionLink to publisher's homepage at http://www.unimap.edu.my/ ; Open access only applicable for vol vol. 1; issue 1, 2008 & vol. 2; issue 1 & 2, 2009.en_US
dc.description.abstractSingle-walled carbon nanotubes have been synthesized by a gas-phase CO decomposition (HiPCO) process, involving high-pressure disproportionation of CO as carbon feedstock and catalytic iron particles were obtained from pyrolysis of Fe(CO)5. The diameter and diameter distribution of as grown material dependents on various parameters, the strong is the pressure of CO cold transverse the Fe(CO)5, nozzle geometry and position for the injection of the reactant in the reaction chamber to produce smaller diameter (about 0.9 nm) at higher CO pressure. The HiPCO materials containing iron were purified by a two-step process of oxidation in oxygen atmosphere and successive washing the mixture of hydrochloric and nitric acids neutralised and distilled water (1:1:1). The optical and electronic properties were studied using optical absorption and infrared spectroscopy; in addition, high-resolution transmission electron energy-loss spectroscopy was used to analyse the loss function, electron diffraction and core level excitations. The degree of purification achieved was estimated using transmission electron microscopy. Furthermore, the present procedure has a no sufficiently change in the diameter and diameter distribution after Gaussian fit of the optical absorbance spectra. The estimation of the degree of purification is possible by the analysis of core level excitation; finally high purity SWCNTs were obtained.en_US
dc.language.isoenen_US
dc.publisherUniversiti Malaysia Perlisen_US
dc.subjectGaussian fiten_US
dc.subjectLoss functionen_US
dc.subjectHigh Resolution Electron energy loss spectroscopyen_US
dc.subjectCatalysisen_US
dc.subjectNanotubesen_US
dc.subjectCarbonen_US
dc.subjectNanostructured materialsen_US
dc.titleElectronic and optical properties of the express purified SWCNTs produced by HiPCO processen_US
dc.typeArticleen_US


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