Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 18: Poster: Towards Molecular Spintronics, Organic Thin Films, Optical Layers, Vibrational Spectroscopy, Tayloring organic interfaces

DS 18.18: Poster

Dienstag, 26. Februar 2008, 14:30–19:30, Poster A

AFM Lithography on Polymer Brushes and Spin-Coated Polymer Films — •Michael Hirtz¹, Marion K. Brinks², Armido Studer², Harald Fuchs¹, and Lifeng Chi¹ — ¹Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany — ²Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149 Münster, Germany

Polymer brushes offer an interesting route to tailor surface properties [1]. Additionally it is of great interest to generate structured polymer brushes [2,3,4]. Here we present our investigation on the properties of different polymer brushes (polystyrene (PS), polyacrylate (PA) and poly(n-isopropylacrylamide) (PNIPAM)) with a thickness of 5 to 50nm grafted onto siliconoxide used as substrates for AFM lithography. In comparison to spin-coated polymer films of similar thickness, polymer brushes exhibit enhanced mechanical properties in regard to pattern fidelity, stability and resolution. The resulting patterns can be used as masks and templates for further lithographic steps.

[1] Y. Tsujii, K. Ohno, S. Yamamoto, A. Goto, T. Fukuda; Adv. Polym. Sci. (2006) 197: 1-45. [2] K.D. Dronavajjala, R. Rajagopalan, S. Uppili, A. Sen, D.L. Allara, H.C. Foley; J. Am. Chem. Soc. (2006) 128: 13040-13041. [3] Y. Tsujii, M. Ejaz, S. Yamamoto, T. Fukuda, K. Shigeto, K. Mibu, T. Shinjo; Polymer (2002) 43: 3837-3841. [4] M.K. Brinks, M. Hirtz, L.F. Chi, H. Fuchs, A. Studer; Angew. Chem. Int. Ed. (2007) 46: 5231-5233.