Small angle neutron scattering (SANS) studies on the structural evolution of pyromellitamide self-assembled gels

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dc.contributor.authorJamieson, SAen_AU
dc.contributor.authorTong, KWKen_AU
dc.contributor.authorHamilton, WAen_AU
dc.contributor.authorHe, Len_AU
dc.contributor.authorJames, Men_AU
dc.contributor.authorThordarson, Pen_AU
dc.date.accessioned2016-08-29T01:58:41Zen_AU
dc.date.available2016-08-29T01:58:41Zen_AU
dc.date.issued2014-10-31en_AU
dc.date.statistics2016-08-29en_AU
dc.description.abstractThe kinetics of aggregation of two pyromellitamide gelators, tetrabutyl- (C4) and tetrahexyl-pyromellitamide (C6), in deuterated cyclohexane has been investigated by small angle neutron scattering (SANS) for up to 6 days. The purpose of this study was to improve our understanding of how self-assembled gels are formed. Short-term (< 3 h) time scales revealed multiple phases with the data for the tetrabutylpyromellitamide C4, indicating one-dimensional stacking and aggregation corresponding to a multifiber braided cluster arrangement that is about 35 Å in diameter. The corresponding tetrahexylpyromellitamide C6 data suggest that the C6 also forms one-dimensional stacks but that these aggregate to a thicker multifiber braided cluster that has a diameter of about 62 Å. Over a longer period of time, the radius, persistence length, and contour length all continue to increase in 6 days after cooling. These data suggest that structural changes in self-assembled gels occur over a period exceeding several days and that fairly subtle changes in the structure (e.g., tail-length) can influence the packing of molecules in self-assembled gels on the single-to-few fiber bundle stage © 2014, American Chemical Society.en_AU
dc.identifier.citationJamieson, S. A., Tong, K. W. K., Hamilton, W. A., He, L., James, M., & Thordarson, P. (2014). Small angle neutron scattering (SANS) studies on the structural evolution of pyromellitamide self-assembled gels. Langmuir, 30(46), 13987-13993. doi:10.1021/la502546nen_AU
dc.identifier.govdoc7046en_AU
dc.identifier.issn0743-7463en_AU
dc.identifier.issue46en_AU
dc.identifier.journaltitleLangmuiren_AU
dc.identifier.pagination13987-13993en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/la502546nen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7404en_AU
dc.identifier.volume30en_AU
dc.language.isoenen_AU
dc.publisherACS Publicationsen_AU
dc.subjectKineticsen_AU
dc.subjectCyclohexaneen_AU
dc.subjectDataen_AU
dc.subjectFibersen_AU
dc.subjectTetralinen_AU
dc.subjectMoleculesen_AU
dc.titleSmall angle neutron scattering (SANS) studies on the structural evolution of pyromellitamide self-assembled gelsen_AU
dc.typeJournal Articleen_AU
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