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Advanced Materials 2007 (accepted)

Carbon Nanofoam Films from “Hairy” Polyacrylonitrile-Grafted Colloidal Silica Nanoparticles Tomasz Kowalewski, Carnegie Mellon University , DMR 0304508.

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Advanced Materials 2007 (accepted)

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  1. Carbon Nanofoam Films from “Hairy” Polyacrylonitrile-Grafted Colloidal Silica NanoparticlesTomasz Kowalewski, Carnegie Mellon University, DMR 0304508 We have developed a new strategy for the synthesis of thin-film carbon nanofaoms using as precursors “hairy” silica particles grafted with polyacrylonitrile (PAN). Well-defined hybrid particles were prepared by Atom Transfer Radical Polymerization (ATRP) using the “grafting from” approach. The hairy nanoparticles were cast into thin films, which were then converted through pyrolysis into carbon-silica nanocmposite. Subsequent removal of silica by HF etching yielded thin films with characteristic “nanofoam” morphology and appreciable adsorption capacity. Some envisioned applications of carbon nanofoam films prepared using this approach include separation media, catalyst supports and high surface area electrodes. Advanced Materials2007 (accepted)

  2. NIRT: Novel Nanostructured Carbons from Block Copolymers Containing Polyacrylonitrile: from Synthesis and Characterization to Devices Tomasz Kowalewski, Krzysztof Matyjaszewski, Lisa M. Porter, David N. Lambeth (Carnegie Mellon University), Mietek Jaroniec (Kent State University), Rod Ruoff (Northwestern University), DMR 0304508 Interdisciplinary and Synergistic Activities: Inherently interdisciplinary character of this project brought together researchers from Carnegie Mellon’s colleges of science and technology, giving rise to collaborations which eventually extended to other joint endeavours. Science and engineering students participating in the project routinely rotate through the labs gaining unique interdisciplinary experience. Principal Investigators participate in the activities of recently formed Carnegie Mellon Center for Nano-enabled Device and Energy Technologies and of the Controlled Radical Polymerization (CRP) Consortium at Carnegie Mellon University. Training and Education: this grant currently supports doctoral candidates Lynnne McCullough, John McGann (Chemistry), Gilad Kusne (Electrical Engineering), Pranita Kulkarni (Materials Science) and Joanna Gorka (Chemistry, Kent State University). In 2006 the first graduate student entirely supported on this project, Chuanbing Tang, defended his Ph.D. thesis entitled “Nanostructured Carbon from Well-Defined Polyacrylonitrile (Co) Polymers Obtained by Controlled/Living Radical Polymerizations”. Our former senior post-doc, Dr. Michal Kruk is now an Assistant Professor of Chemistry at CUNY, Staten Island. Another former post-doc, Dr. Shijun Jia is a research scientist at Plextronics, a start-up company focused on organic electronics. Outreach: PI’s and graduate students participated in the workshops for science teachers organized by the Carnegie Mellon’s Science Van program aimed at students and teachers in grades 5-9 in Allegheny and surrounding counties in western Pennsylvania.

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