Clay particles - potential of positron annihilation lifetime spectroscopy (PALS) for studying interlayer spacing

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dc.contributor.authorFong, Nen_AU
dc.contributor.authorGuagliardo, Pen_AU
dc.contributor.authorWilliams, Jen_AU
dc.contributor.authorMusumeci, AWen_AU
dc.contributor.authorMartin, DJen_AU
dc.contributor.authorSmith, SVen_AU
dc.date.accessioned2011-03-30T22:53:21Zen_AU
dc.date.available2011-03-30T22:53:21Zen_AU
dc.date.issued2010-08-01en_AU
dc.date.statistics2010-08-01en_AU
dc.description.abstractCharacterisation of clays is generally achieved by traditional methods, such as X-ray diffraction (XRD) and transmission electron microscopy (TEM). However, clays are often difficult to characterise due to lack of long-range order, thus these tools are not always reliable. Because interlayer spacing in clays can be adjusted to house molecules, there is growing interest to use these materials for drug delivery. Positron annihilation lifetime spectroscopy (PALS) was examined as an alternative tool to characterise a series of well-known clays. XRD of two layered double hydroxides; MgAl-LDH and MgGd-LDH, natural hectorite, fluoromica and laponite, and their PALS spectra were compared. XRD data was used to calculate the interlayer d- spacing in these materials and results show a decrease in interlayer spacing as the heavy metal ions are substituted for those of large ionic radii. Similar results were obtained for PALS data. This preliminary study suggests PALS has potential as a routine tool for characterising clay particles. Further work will examine the sensitivity and reliability of PALS to percent of metal doping and hydration in clay microstructure. © 2020 IOP Publishingen_AU
dc.description.sponsorshipARC Centre for Antimatter-Matter Studies; Australian National University (ANU); Flinders University; James Cook University (JCU); The Institute of Physics; Australian Government Department of Innovation, Industry, Science and Researchen_AU
dc.identifier.articlenumber012022en_AU
dc.identifier.citationFong, N., Guagliardo, P., Williams, J., Musumeci, A., Martin, D., & Smith, S. V. (2010). Clay particles - potential of positron annihilation lifetime spectroscopy (PALS) for studying interlayer spacing. Paper presented to the 12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules (SLOPOS12), 1st - 6th August 2010. All Seasons Resort: Magnetic Island, North Queensland, Australia. In Journal of Physics: Conference Series, 262(1), 012022. doi:10.1088/1742-6596/262/1/012022en_AU
dc.identifier.conferenceenddate6 August 2010en_AU
dc.identifier.conferencename12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules (SLOPOS12)en_AU
dc.identifier.conferenceplaceMagnetic Island, North Queenslanden_AU
dc.identifier.conferencestartdate1 August 2010en_AU
dc.identifier.govdoc3333en_AU
dc.identifier.issn1742-6588en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleJournal of Physics: Conference Seriesen_AU
dc.identifier.urihttp://dx.doi.org/10.1088/1742-6596/262/1/012022en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3165en_AU
dc.identifier.volume262en_AU
dc.language.isoenen_AU
dc.publisherInstitute of Physicsen_AU
dc.subjectClaysen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectAnnihilationen_AU
dc.subjectPositronsen_AU
dc.subjectHeavy metalsen_AU
dc.titleClay particles - potential of positron annihilation lifetime spectroscopy (PALS) for studying interlayer spacingen_AU
dc.typeConference Paperen_AU
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