Small angle scattering characterisation of micellar systems and templated architectures

dc.contributor.advisorHolmes, Justin D.
dc.contributor.authorO'Callaghan, John M.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2010-06-02T12:01:59Z
dc.date.available2010-06-02T12:01:59Z
dc.date.copyright2010
dc.date.issued2010-04
dc.date.submitted2010-04
dc.description.abstractThe work described in this thesis reports the structural changes induced on micelles under a variety of conditions. The micelles of a liquid crystal film and dilute solutions of micelles were subjected to high pressure CO2 and selected hydrocarbon environments. Using small angle neutron scattering (SANS) techniques the spacing between liquid crystal micelles was measured in-situ. The liquid crystals studied were templated from different surfactants with varying structural characteristics. Micelles of a dilute surfactant solution were also subjected to elevated pressures of varying gas atmospheres. Detailed modelling of the in-situ SANS experiments revealed information of the size and shape of the micelles at a number of different pressures. Also reported in this thesis is the characterisation of mesoporous materials in the confined channels of larger porous materials. Periodic mesoporous organosilicas (PMOs) were synthesised within the channels of anodic alumina membranes (AAM) under different conditions, including drying rates and precursor concentrations. In-situ small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM) was used to determine the pore morphology of the PMO within the AAM channels. PMO materials were also used as templates in the deposition of gold nanoparticles and subsequently used in the synthesis of germanium nanostructures. Polymer thin films were also employed as templates for the directed deposition of gold nanoparticles which were again used as seeds for the production of germanium nanostructures. A supercritical CO2 (sc-CO2) technique was successfully used during the production of the germanium nanostructures.en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO'Callaghan, J.M., 2010. Small angle scattering characterisation of micellar systems and templated architectures. PhD Thesis, University College Cork.en
dc.identifier.urihttps://hdl.handle.net/10468/177
dc.language.isoenen
dc.publisherUniversity College Corken
dc.relation.isbasedonO'Callaghan JM, Copley MP, Hanrahan JP, Morris MA, Steytler DC, Heenan RK, Staudt R, Holmes JD, 2008. Supercritical fluid swelling of liquid crystal films. Langmuir, 24(13), pp.6959-64. doi: 10.1021/la800073t
dc.relation.isbasedonJohn M. O’Callaghan, Nikolay Petkov, Mark P. Copley, Donna C. Arnold, Michael A. Morris, Heinz Amenitsch, and Justin D. Holmes, 2010. Time-resolved SAXS studies of periodic mesoporous organosilicas in anodic alumina membranes. Microporous and Mesoporous Materials 130, (1-3), pp. 203-207. doi:10.1016/j.micromeso.2009.11.007
dc.relation.isbasedonJohn M. O’Callaghan, Hugh McNamara, Mark P. Copley, John P. Hanrahan, Michael A. Morris, David C. Steytler, Richard K. Heenan and Justin D. Holmes, 2010. Swelling of Ionic and Nonionic Surfactant Micelles by High Pressure Gases. Langmuir 26 (11), pp 7725–7731. doi: 10.1021/la904464k
dc.relation.urihttp://library.ucc.ie/record=b1999321~S0
dc.rights©2010, John M. O'Callaghanen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectSmall-angle neutron scatteringen
dc.subjectMesoporous silicaen
dc.subjectSurfactant liquid crystalsen
dc.subject.lcshSmall-angle x-ray scatteringen
dc.subject.lcshMicellesen
dc.subject.lcshMesoporous materialsen
dc.subject.lcshLiquid crystalsen
dc.titleSmall angle scattering characterisation of micellar systems and templated architecturesen
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD. Scienceen
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
OCallaghanJM_PhD2010.pdf
Size:
4.67 MB
Format:
Adobe Portable Document Format
Description:
Full text available
License bundle
Now showing 1 - 2 of 2
Loading...
Thumbnail Image
Name:
license.txt
Size:
5.82 KB
Format:
Item-specific license agreed upon to submission
Description:
Loading...
Thumbnail Image
Name:
License177.pdf
Size:
245.35 KB
Format:
Adobe Portable Document Format
Description:
License