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https://hdl.handle.net/2440/124880
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dc.contributor.author | Jamieson, S. | - |
dc.contributor.author | Tong, K. | - |
dc.contributor.author | Hamilton, W. | - |
dc.contributor.author | He, L. | - |
dc.contributor.author | James, M. | - |
dc.contributor.author | Thordarson, P. | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | Langmuir: the ACS journal of surfaces and colloids, 2014; 30(46):13987-13993 | - |
dc.identifier.issn | 0743-7463 | - |
dc.identifier.issn | 1520-5827 | - |
dc.identifier.uri | http://hdl.handle.net/2440/124880 | - |
dc.description.abstract | The 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. | - |
dc.description.statementofresponsibility | Scott A. Jamieson, Katie W. K. Tong, William A. Hamilton, Lilin He, Michael James and Pall Thordarson | - |
dc.language.iso | en | - |
dc.publisher | ACS Publishing | - |
dc.rights | © 2014 American Chemical Society | - |
dc.source.uri | http://dx.doi.org/10.1021/la502546n | - |
dc.subject | Amides | - |
dc.subject | Benzoates | - |
dc.subject | Gels | - |
dc.subject | Neutron Diffraction | - |
dc.subject | Models, Chemical | - |
dc.subject | Scattering, Small Angle | - |
dc.title | Small angle neutron scattering (SANS) studies on the structural evolution of pyromellitamide self-assembled gels | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1021/la502546n | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP130101512 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/FT120100101 | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest 8 Chemistry publications |
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