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Co 3 O 4 Nanowires “Homo-mesopolymers”

Co 3 O 4 Nanowires “Homo-mesopolymers”. Co 3 O 4 -block-Co Nanowires “Block-mesopolymers”. AuNP-Co 3 O 4 nanowires “Core-shell-mesopolymers”. Colloidal Polymerization of Ferromagnetic Nanoparticles into Cobalt Oxide Nanowires Jeffrey Pyun, University of Arizona, DMR 0645618.

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Co 3 O 4 Nanowires “Homo-mesopolymers”

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  1. Co3O4 Nanowires “Homo-mesopolymers” Co3O4-block-Co Nanowires “Block-mesopolymers” AuNP-Co3O4 nanowires “Core-shell-mesopolymers” Colloidal Polymerization of Ferromagnetic Nanoparticles into Cobalt Oxide NanowiresJeffrey Pyun, University of Arizona, DMR 0645618 “Colloidal Monomers” Polymer Coated Core-Shell AuCo-Nanoparticles Polymer Coated Ferromagnetic Co-Nanoparticles Colloidal Polymerization We have demonstrated the ability to use dipolar polystyrene coated ferromagnetic cobalt nanoparticles (PS-CoNPs) as “Colloidal Monomers” to prepare 1-D “meso-polymers” of Co3O4 nanowires. This process is referred to as “Colloidal Polymerization” and is reminiscent of AB monomers in step-growth polymerizations. By control of PS-CoNP size and composition, we have prepared a wide range of cobalt oxide nanowires with controlled block-like sequences and Au nanoparticle (AuNP) inclusions. We are pursuing potential applications of these materials as electrodes for Li-batteries and photocatalysts for solar fuels. Au-Co3O4 nanowires Au-CoNPs 40 nm 40 nm ACS Nano 2009, in press J. Am. Chem. Soc. 2009, in preparation

  2. Colloidal Polymerization of Ferromagnetic Nanoparticles into Cobalt Oxide NanowiresJeffrey Pyun, University of Arizona, DMR 0645618 International Impact: Education: Funding from this NSF-CAREER award has enabled support of three graduate students, Pei Keng (5th-yr), Bo Yun Kim (4th-yr), Sarah Rasmussen (3nd-yr). Two undergraduates, Mathew Bull (University of Arizona) and Jared Gabriel (Case Western) have continued to excel as researchers in 2008-2009. Pyun recently granted joint appointment in Chemical Engineering at Seoul National University as Associate Professor for work in Energy storage and conversion enabled by NSF-CAREER funded work on polymers. M-Bull J-Griebel Outreach: A new high school course for research in the physical sciences has been created in collaboration with Don Adams (Science teacher) at Vale High School in Tucson, AZ. Caitlyn Hall (junior, Vale HS) has been conducting research with Pyun and presented this work at State-level poster competition on science & engineering. A K-12 outreach program has also been created with Jenny Miller at Thornydale Elementary School, Tucson, AZ for lectures to 4rd & 6th students Pyun at Thornydale ES

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