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Introduction: Polymer Nanocomposite Surfaces

Regulation of Polymer Blend Morphology using Nanospheres and Nanorods Russell J. Composto, University of Pennsylvania, DMR 0549307. Introduction: Polymer Nanocomposite Surfaces

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Introduction: Polymer Nanocomposite Surfaces

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  1. Regulation of Polymer Blend Morphology using Nanospheres and Nanorods Russell J. Composto, University of Pennsylvania, DMR 0549307 Introduction: Polymer Nanocomposite Surfaces Functional nanoparticles (NPs) combined with polymers lead to new materials with unique properties that improve upon conventional materials used for applications from antibacterial to antireflective surfaces. In this research highlight, silica NPs are covalently assembled on copolymer surfaces to provide materials with unique wetting and optical properties. Further, gold NPs are deposited on dense arrays of silica particles to create a hierarchy of tunable properties. Hierarchy Structure for Unique Optical Properties (collaboration with S. Yang, UPenn) The kinetics of covalent attachment of silica particles to polymer coatings was investigated as a means to control particle coverage and wetting properties. The silica nanoparticles are “observed” with atomic force microscopy (Left Top) and their coverage increases from 0 to 70% (Center). Correspondingly the contact angle (wettability) can be tuned from 75º to 120º (Left Bottom). Gold nanoparticles (10nm) deposited on the large silica particles produce tunable optical properties (Right).

  2. Regulation of Polymer Blend Morphology using Nanospheres and Nanorods Russell J. Composto, University of Pennsylvania, DMR 0549307 Broader Impact: Outreach, Education and Training Partnership with Central High School (CHS), Philadelphia, PA • CHS is academically strong and diverse (32% African American, 5% Latino, 25% Asian). • Introduction to Materials Science was introduced by Mr. Patton (RET) Sept 09. • 100 students for 30 openings! • Real world applications including alternative energy, recycling, swords and cooking. • The “polymer pageant” and reverse engineering of electronic devices spawned creativity. • A new Instron 5565 (below) donated by Instron used to compare strength of materials. • In 9/09, lectures complemented by hands on use of electron microscopes at UPenn. • Research Training, ‘06-’09: • 21 undergraduates (5 REU) • 9 PhD candidates (4 Awarded) • 4 post-doctoral students • 5 MS candidates (2 Awarded) • 3 high school teachers (2 RET) • 1 high school junior Mr. Patton, PI and Mr. Richie (Instron) at school assembly to dedicate Instron on 11/14/08. Mr. Patton testing Instron at “ribbon stretching” ceremony.

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