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Novel Nanogold Syntheses and Control of the Interaction between Nanogold and Wool Fibres

dc.contributor.advisorJohnston, Jim
dc.contributor.authorWrigglesworth, Emma
dc.date.accessioned2016-09-08T22:53:54Z
dc.date.accessioned2022-11-03T19:33:41Z
dc.date.available2016-09-08T22:53:54Z
dc.date.available2022-11-03T19:33:41Z
dc.date.copyright2016
dc.date.issued2016
dc.date.updated2016-09-04T23:47:32Z
dc.description.abstractThe coloured characteristic of gold nanoparticles make them an appealing and useful material. Arising from localised surface plasmon resonance, this colour is strong and stable and can be manipulated by controlling the size and shape of the particles. Professor Jim Johnston and Dr Kerstin Lucas of Victoria University of Wellington have utilised these characteristics through the dyeing of New Zealand wool with nanoparticle gold, creating a valuable technology that is currently being commercialised by Noble Bond Ltd under the registered trade mark Aulana®. This research programme has been concerned with developing new gold nanoparticle syntheses to extend the colour range available without the use of toxic structure directing agents, and also with improving the strength of binding between nanogold and wool fibres. Novel gold nanoparticle syntheses have been developed by the application of two reducing agents simultaneously. The mechanism of particle growth differs from that obtained when either reductant is used alone and results in different shaped and sized nanoparticles and so different coloured colloids. The resulting colloids have been applied to yarn samples to produce nanogold-wool composites. Thorough characterisation and analysis of the colloids and the resulting composites has been completed. Efforts were made to improve the wash-fastness of the composites by replacing the electrostatic attraction between the nanogold and the fibres with a stronger chemical bond. A mordant traditionally used with organic dyes was employed as a linking agent between stabilised nanoparticles and the amino acids in wool. Additionally the sulfur-sulfur bond of the cystine amino acid in wool was reduced to facilitate the formation of a gold-sulfur bond. The wash-fastness of the composites produced by these methods were tested and the nature of the nanogold-wool bond analysed via comprehensive characterisation. This research builds upon work completed by Professor Johnston’s research group. It adds novel nanogold syntheses to the group’s body of knowledge and further improves understanding of the interaction between nanogold and wool fibres.en_NZ
dc.formatpdfen_NZ
dc.identifier.urihttps://ir.wgtn.ac.nz/handle/123456789/29963
dc.languageen_NZ
dc.language.isoen_NZ
dc.publisherTe Herenga Waka—Victoria University of Wellingtonen_NZ
dc.rights.holderAll rights, except those explicitly waived, are held by the Authoren_NZ
dc.rights.licenseAuthor Retains Copyrighten_NZ
dc.rights.urihttps://www.wgtn.ac.nz/library/about-us/policies-and-strategies/copyright-for-the-researcharchive
dc.subjectGolden_NZ
dc.subjectNanoparticleen_NZ
dc.subjectNanocompositeen_NZ
dc.subjectDual reductantsen_NZ
dc.titleNovel Nanogold Syntheses and Control of the Interaction between Nanogold and Wool Fibresen_NZ
dc.typeTexten_NZ
thesis.degree.disciplineChemistryen_NZ
thesis.degree.grantorTe Herenga Waka—Victoria University of Wellingtonen_NZ
thesis.degree.levelMastersen_NZ
thesis.degree.nameMaster of Scienceen_NZ
vuwschema.contributor.unitSchool of Chemical and Physical Sciencesen_NZ
vuwschema.subject.anzsrcfor030302 Nanochemistry and Supramolecular Chemistryen_NZ
vuwschema.subject.anzsrcfor030303 Optical Properties of Materialsen_NZ
vuwschema.subject.anzsrcfor030306 Synthesis of Materialsen_NZ
vuwschema.subject.anzsrctoa3 APPLIED RESEARCHen_NZ
vuwschema.type.vuwAwarded Research Masters Thesisen_NZ

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