KIT - Campus North -
Lecture Hall 0-167, Bldg. 640

14.10.2009

Dr. Dr. Michael Hirtz
Physikalisches Institut
Karlsruhe Institute of Technology, Germany

14:00

Abstract: The Langmuir-Blodgett technique offers rich opportunities for the structuring of surfaces.[1] In this talk we present an interesting route to obtain mesoscale structured polymer brushes over large surface areas (several cm²).[2] The mechanical stability of those polymer brushes also led to new possibilities in AFM lithography. Polymer brushes up to a thickness of 40nm can be readily structured with features down to 100nm in this way. The stability against solvents (in contrast to spin-coated polymer films) enables subsequent selective deposition of dyes and biomolecules onto the structured samples.[3 ]  A third topic covered in this talk will be the application of molecular dynamics (MD) simulations to reveal the molecular mechanisms behind the selective deposition of organic molecules onto template structures formed by Langmuir-Blodgett technique.

[1] X. Chen, S. Lenhert, M. Hirtz, N. Lu, H. Fuchs, L. Chi: Langmuir-Blodgett Patterning: A bottom-up Way to build Mesostructures over large Areas; Acc. Chem. Res., 40(6), 393-401, 2007
[2] M. Brinks, M. Hirtz, L. Chi, H. Fuchs, A. Studer: Site-selective surface-initiated Polymerization by Langmuir-Blodgett Lithography; Angew. Chem. Int. Ed., 46, 5231-5233, 2007
[3] M. Hirtz, M. K. Brinks, S. Miele, A. Studer, H. Fuchs, L. F. Chi: Structured Polymer Brushes by AFM Lithography; Small, 5(8), 919-923, 2009