Preparation of Au and Au-Pt nanoparticles within PMMA matrix using UV and X-ray irradiation

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buir.contributor.authorSüzer, Şefik
dc.citation.epage466en_US
dc.citation.issueNumber2en_US
dc.citation.spage462en_US
dc.citation.volumeNumber50en_US
dc.contributor.authorOzkaraoglu, E.en_US
dc.contributor.authorTunc, I.en_US
dc.contributor.authorSüzer, Şefiken_US
dc.date.accessioned2016-02-08T10:05:39Z
dc.date.available2016-02-08T10:05:39Z
dc.date.issued2009en_US
dc.departmentDepartment of Chemistryen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractAu and Au-Pt alloy nanoparticles are prepared and patterned at room temperature within the PMMA polymer matrix by the action of 254 nm UV light or X-rays. The polymer matrix enables us to entangle the kinetics of the photochemical reduction from the nucleation and growth processes, when monitored by UV-vis spectroscopy. Accordingly, increase of the temperature to 50 °C of the reaction medium increases the nucleation and growth rates of the nanoparticle formation by more than one order of magnitude, due to enhanced diffusion and nucleation at the higher temperature, but has no effect on the photochemical reduction process. Presence of Pt ions also increases the same rate, but by a factor two only. Similar photochemical reduction and particle growth take also place within the PMMA matrix, when these metal ions are subjected to prolonged exposure to X-rays, as evidenced by XPS analysis. Both angle-resolved and charge-contrast measurements using XPS reveal that the resultant Au and Pt species are in close proximity to each other, indicating the Au-Pt alloy formation to be the most likely case.en_US
dc.identifier.doi10.1016/j.polymer.2008.12.008en_US
dc.identifier.eissn1873-2291
dc.identifier.issn0032-3861
dc.identifier.urihttp://hdl.handle.net/11693/22854
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.polymer.2008.12.008en_US
dc.source.titlePolymeren_US
dc.subjectNucleation and growthen_US
dc.subjectPhotoreduction and photo-patterningen_US
dc.subjectX-ray photoelectron spectroscopyen_US
dc.subjectElectron spectroscopyen_US
dc.subjectGolden_US
dc.subjectGold alloysen_US
dc.subjectGrowth (materials)en_US
dc.subjectGrowth kineticsen_US
dc.subjectIonsen_US
dc.subjectMetal ionsen_US
dc.subjectNanoparticlesen_US
dc.subjectNucleationen_US
dc.subjectPhotoelectricityen_US
dc.subjectPhotoelectron spectroscopyen_US
dc.subjectPhotoionizationen_US
dc.subjectPhotonsen_US
dc.subjectPlatinumen_US
dc.subjectPlatinum alloysen_US
dc.subjectReaction ratesen_US
dc.subjectSpectrum analysisen_US
dc.subjectUltraviolet spectroscopyen_US
dc.subjectX raysen_US
dc.subjectClose proximitiesen_US
dc.subjectContrast measurementsen_US
dc.subjectEnhanced diffusionsen_US
dc.subjectHigher temperaturesen_US
dc.subjectNanoparticle formationsen_US
dc.subjectParticle growthsen_US
dc.subjectPhotochemical reductionsen_US
dc.subjectPmma matrixesen_US
dc.subjectPt alloysen_US
dc.subjectReaction mediumsen_US
dc.subjectRoom temperaturesen_US
dc.subjectUV lightsen_US
dc.subjectVIS spectroscopiesen_US
dc.subjectXps analysesen_US
dc.subjectX ray photoelectron spectroscopyen_US
dc.subjectDiffusionen_US
dc.subjectNanotechnologyen_US
dc.subjectParticleen_US
dc.subjectPhotochemical degradationen_US
dc.subjectPolymeren_US
dc.subjectPolymethyl methacrylateen_US
dc.subjectUltraviolet radiationen_US
dc.subjectX-ray analysisen_US
dc.titlePreparation of Au and Au-Pt nanoparticles within PMMA matrix using UV and X-ray irradiationen_US
dc.typeArticleen_US
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Department of Chemistry
Institute of Materials Science and Nanotechnology (UNAM)