Photo-driven processes toward nanoparticle synthesis: controlled formation via dendritic scaffolds

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dc.contributor Cassady, Carolyn J.
dc.contributor Pan, Shanlin
dc.contributor Weaver, Mark Lovell
dc.contributor Woski, Stephen A.
dc.contributor.advisor Street, Shane C. Williamson, Jonathan Wayne 2017-03-01T16:35:55Z 2017-03-01T16:35:55Z 2012
dc.identifier.other u0015_0000001_0001092
dc.identifier.other Williamson_alatus_0004D_11331
dc.description Electronic Thesis or Dissertation
dc.description.abstract Poly(methylamido amine) (PMAAM), poly(methylamide) (PMA), and poly(methylamido methyl amine) (PMAMAM) are spectroscopically analogous to poly(amido amine) (PAMAM) dendrimers, and were used to monitor and influence photo-driven processes. By varying the incorporated functionalities, metal ion uptake and the observed ground and excited electronic states change. Functional groups play a vital role in the solution phase, UV-induced nanoparticles synthesis. Quenching studies show that multiple site contributions yield the observed metal ion uptake. Dendrimer and oligomeric scaffolds provide a highly ordered environment to facilitate photo-induced processes; however, current electron transfer mechanisms cannot be elucidated in this work. The initial metal ion uptake contributes drastically to the excited state processes and the synthesized nanoparticle. pH influences the bound precursors altering the morphology of the produced nanoparticle after irradiation. Scaffold-mediated nanoparticles exhibit sizes on the order of the scaffold diameter which varies as a function of generation. The physical properties, such as magnetism, greatly change from the observable bulk properties below 10 nm. Coating these particles in silica such that the final composite size approaches 100 nm enables magneto-optical solution application, but directly attaching silica to the magnetic nanoparticle surface proves difficult. Magnetic nanoparticle surface modification aids in attaching these particles to the surface of silica.
dc.format.extent 290 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Chemistry
dc.title Photo-driven processes toward nanoparticle synthesis: controlled formation via dendritic scaffolds
dc.type thesis
dc.type text University of Alabama. Dept. of Chemistry Chemistry The University of Alabama doctoral Ph.D.

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