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

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dc.rights.license Author Retains All Rights en_NZ
dc.contributor.advisor Johnston, Jim
dc.contributor.author Wrigglesworth, Emma
dc.date.accessioned 2016-09-08T22:53:54Z
dc.date.accessioned 2022-11-03T19:33:41Z
dc.date.available 2016-09-08T22:53:54Z
dc.date.available 2022-11-03T19:33:41Z
dc.date.copyright 2016
dc.date.issued 2016
dc.identifier.uri https://ir.wgtn.ac.nz/handle/123456789/29963
dc.description.abstract The 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.language en_NZ
dc.language.iso en_NZ
dc.publisher Te Herenga Waka—Victoria University of Wellington en_NZ
dc.subject Gold en_NZ
dc.subject Nanoparticle en_NZ
dc.subject Nanocomposite en_NZ
dc.subject Dual reductants en_NZ
dc.title Novel Nanogold Syntheses and Control of the Interaction between Nanogold and Wool Fibres en_NZ
dc.type Text en_NZ
dc.date.updated 2016-09-04T23:47:32Z
vuwschema.contributor.unit School of Chemical and Physical Sciences en_NZ
vuwschema.subject.anzsrcfor 030302 Nanochemistry and Supramolecular Chemistry en_NZ
vuwschema.subject.anzsrcfor 030303 Optical Properties of Materials en_NZ
vuwschema.subject.anzsrcfor 030306 Synthesis of Materials en_NZ
vuwschema.subject.anzsrctoa 3 APPLIED RESEARCH en_NZ
vuwschema.type.vuw Awarded Research Masters Thesis en_NZ
thesis.degree.discipline Chemistry en_NZ
thesis.degree.grantor Te Herenga Waka—Victoria University of Wellington en_NZ
thesis.degree.level Masters en_NZ
thesis.degree.name Master of Science en_NZ

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