2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Effect of Nanoparticle Inclusions on Block copolymer phase morphology

D. Palta, J. Waller and D.G. Bucknall
Georgia Institute of Technology, US

Keywords:
block copolymer, nanoparticle, phase, morphology

Abstract:
Using block copolymers for large-area periodic structure fabrication in potential applications like ultra-high density storage devices and quantum information computers is of great interest because of low fabrication cost and simplicity of the process. By selective inclusion of the nanoparticles into one of the blocks of a self-assembling copolymer, the nanoparticles are forced into a defined spatial arrangement determined by the phase morphology of the copolymer. In this study we show that addition of nanoparticulates to copolymer self-assembling molecular templates causes variations in the phase morphologies. We report the results of the bulk phase behavior of poly(styrene-dimethyl siloxane) (PS-PDMS) and poly(styrene-butadiene-styrene) (SBS) block copolymer systems with inclusion of different percent loadings of 1-50 nm particles of gold and endohedral fullerenes. The copolymer samples (both with and without nanoparticles) have been prepared and characterized using AFM, TEM, SAXS and 13C-NMR measurements. We present results which show that even at relatively low concentrations nanoparticle inclusions (less than 2 wt./vol.%) the block copolymer phase morphology is altered from that of the native copolymer.

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