COLL 363 |
| Georg Krausch, Physikalische Chemie II, Physikalische Chemie II, Universitaet Bayreuth, Bayreuth, 95440, Germany |
| We discuss recent experiments aiming to reveal pH-responsive nanostructures by polymer analogous reactions performed on a highly ordered block copolymer thin film structure. The starting material is a polystyrene-block-poly(2 vinyl pyridine)-block-poly(tert butyl methacrylate) (SVT) triblock copolymer. In thin films, a highly ordered perforated lamella structure is formed with an S core, coated with a V layer and embedded within a matrix of the T majority component. After structure formation, the T phase is hydrolysed in HCl, leaving a perforated lamella with a hydrophobic core and a hydrophilic poly(methacrylic acid) layer attached to it. The resulting structure is imaged with scanning force microscopy (SFM) in aqueous environment. As the pH of the solution is changed, the structure undergoes well defined changes, which are followed in-situ via SFM. |
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“Smart” Polymers on Surfaces and Colloids
2:00 PM-5:20 PM, Tuesday, March 30, 2004 Marriott -- Grand Ballroom J, Oral
Division of Colloid and Surface Chemistry |