Study of porosity of synthetic polymer nanoparticles using PALS

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dc.contributor.authorPham, Ben_AU
dc.contributor.authorGuagliardo, Pen_AU
dc.contributor.authorWilliams, Jen_AU
dc.contributor.authorSamarin, Sen_AU
dc.contributor.authorSmith, SVen_AU
dc.date.accessioned2011-03-30T23:06:44Zen_AU
dc.date.available2011-03-30T23:06:44Zen_AU
dc.date.issued2010-08-01en_AU
dc.date.statistics2010-08-01en_AU
dc.description.abstractPositron annihilation lifetime spectroscopy (PALS) has been used to study the free volume in dry synthetic polymer nanoparticles of various sizes. A series of poly(styrene/divinyl benzene) particles with diameters in the range of 100 to 500 nm were synthesized and then carefully chemically treated using the sulfonation process, to increase their porosity. The particles were characterised by Scanning Electron Microscopy (SEM), light scattering and PALS. Light scattering gave larger size for the treated particles, reflecting the hydration effect and therefore the increase in porosity. PALS spectra of untreated and treated particles gave four and three life-time components, respectively. Analysis by PAScual version 1.3.0 program indicated there was a reduction in the intensity and the type of the micropores in the treated particles. The data suggest PALS is a sensitive tool for detecting changes in microporosity in particles. The conflicting results obtained for light scattering compared to PALS for chemically treated particles is difficult to resolve and suggests sample preparation of polymeric materials for PALS is the critical factor.en_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.articlenumber12048en_AU
dc.identifier.citationPham, B., Guagliardo, P., Williams, J., Samarin, S., & Smith, S. V. (2010). Study of porosity of synthetic polymer nanoparticles using PALS. Paper presetented 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), 012048. doi:10.1088/1742-6596/262/1/012048en_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.govdoc3334en_AU
dc.identifier.issn1742-6588en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleJournal of Physics: Conference Seriesen_AU
dc.identifier.urihttp://dx.doi.org/10.1088/1742-6596/262/1/012048en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3166en_AU
dc.identifier.volume262en_AU
dc.language.isoenen_AU
dc.publisherInstitute of Physicsen_AU
dc.subjectPositronsen_AU
dc.subjectAnnihilationen_AU
dc.subjectScanning electron microscopyen_AU
dc.subjectLight scatteringen_AU
dc.subjectBenzeneen_AU
dc.subjectParticle beamsen_AU
dc.titleStudy of porosity of synthetic polymer nanoparticles using PALSen_AU
dc.typeConference Paperen_AU
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