Reversible immersion and elevation of nanoparticles in ultrathin nanocomposite block copolymer films

COLL 341

Igor Luzinov, luzinov@clemson.edu1, K. Swaminathan Iyer, siyer@cyllene.uwa.edu.au2, Jeff Moreland1, Serhiy Malynych, smalyn@clemson.edu3, and George Chumanov, gchumak@clemson.edu3. (1) School of Materials Science and Engineering, Clemson University, 161 Sirrine Hall, Clemson, SC 29634, (2) Centre for Strategic Nano-fabrication, School of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, Crawley, WA-6009, Australia, (3) Department of Chemistry, Clemson University, Clemson, SC 29634
Thin nanocomposite films consisting of silver nanoparticles (100 nm) evenly dispersed in poly(styrene-b-2-vinyl pyridine) (PS-PVP) block copolymer were formed via melt incorporation. Block copolymer films of 30-250 nm thick were deposited on silicon and glass substrates by dip-coating from solution. First, the nanoparticles were attached to the PVP domains exposed to the surface of the block copolymer film. Next, the substrates covered with nanoparticles were annealed at 130 degrees C in vacuum oven for different periods of time. The thermal treatment caused incorporation of the nanoparticles into the polymeric film. Level of the nanoparticles incorporation strongly depended on the thickness of the block copolymer film. Thermal treatment in the presence of selective solvents caused reversible immersion and elevation of the nanoparticles in the polymeric film.
 

Polymer-Nanoparticle Systems: Theory, Simulation, Experiments
2:00 PM-5:00 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 227, Oral

Division of Colloid & Surface Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008