Pretreatment control of carbon nanotube array growth for gas separation: alignment and growth studied using microscopy and small-angle x-ray scattering

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dc.contributor.authorYang, XSen_AU
dc.contributor.authorYuan, LXen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorMinett, AIen_AU
dc.contributor.authorZhao, MWen_AU
dc.contributor.authorKirby, Nen_AU
dc.contributor.authorMudie, STen_AU
dc.contributor.authorHarris, ATen_AU
dc.date.accessioned2013-11-07T05:07:10Zen_AU
dc.date.available2013-11-07T05:07:10Zen_AU
dc.date.issued2013-04-24en_AU
dc.date.statistics2013-11-07en_AU
dc.description.abstractAligned multiwalled carbon nanotube (CNT) arrays were prepared using chemical vapor deposition of C2H4 on Fe catalyst at 750 degrees C. CNT array height and alignment depends strongly on the duration of H-2 pretreatment, with optimal height and alignment achieved using 10-15 min pretreatment. Small-angle X-ray scattering (SAXS) was used to quantify the alignment, distribution, and size of the CNTs in arrays produced from varying pretreatment times and the results correlated with microscopy measurements. SAXS analysis revealed that the higher section of the CNT arrays exhibited better alignment than the lower section. Combining these insights with transmission electron microscopy measurements of the CNT defects within each array enable a mechanism for the CNT growth to be proposed, where the loss of alignment arises from deformation of the CNTs during their growth. Gas permeation test across densified CNT arrays indicated that the alignment of the CNT array plays an important role in the gas transport, and that the gas diffusion across the well-aligned CNT arrays was enhanced by a factor of 45, which is much more than that across the poorly aligned CNT arrays, with an enhancement factor of similar to 8. © 2013, American Chemical Society.en_AU
dc.identifier.citationYang, X. S., Yuan, L. X., Peterson, V. K., Minett, A. I., Zhao, M., Kirby, N., Mudie, S., & Harris, A. T. (2013). Pretreatment control of carbon nanotube array growth for gas separation: alignment and growth studied using microscopy and small-angle x-ray scattering. ACS Applied Materials & Interfaces, 5(8), 3063-3070. doi:10.1021/am3032579en_AU
dc.identifier.govdoc5107en_AU
dc.identifier.issn1944-8244en_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleACS Applied Materials & Interfacesen_AU
dc.identifier.pagination3063-3070en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/am3032579en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4900en_AU
dc.identifier.volume5en_AU
dc.language.isoenen_AU
dc.publisherAmerical Chemical Societyen_AU
dc.subjectCatalystsen_AU
dc.subjectFilmsen_AU
dc.subjectWateren_AU
dc.subjectMembranesen_AU
dc.subjectDensityen_AU
dc.subjectNucleationen_AU
dc.titlePretreatment control of carbon nanotube array growth for gas separation: alignment and growth studied using microscopy and small-angle x-ray scatteringen_AU
dc.typeJournal Articleen_AU
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