Nanoscale structuring and patterning of polymeric materials
Event details
| Date | 03.03.2014 |
| Hour | 13:15 |
| Speaker |
Holger Schönherr, University of Siegen, Germany Bio: Holger Schönherr studied chemistry and polymer chemistry & physics at the Universities of Mainz and Toronto and finished his diploma thesis with Helmut Ringsdorf in 1995. He obtained his Ph.D. at the University of Twente, The Netherlands in 1999, working with G. Julius Vancso. Following a postdoctoral stay at Stanford University with Curtis W. Frank he joined the MESA+ Institute for Nanotechnology in Twente as assistant (later associate) professor before joining the University of Siegen in 2008 as a University Professor in Physical Chemistry. In April 2013 he was also appointed as guest professor at the Shanghai Jiaotong University. He was awarded, among others, with the Schloessmann award (Biology and Materials Science) of the Max Planck Society (1995), the DSM Award (2nd) for Chemistry & Technology (1999), a NWO vernieuwingsimpuls (VIDI) grant (2001), the Raphael-Eduard-Liesegang award of the German Colloid Society (2011), an ERC starting grant (2011), the POLYCHAR Materials Science Award 2013 and Research Prize of the Faculty of Science and Technology of the University of Siegen (2013). His research interests comprise the chemistry and physics of biointerfaces, self-assembled and nanostructured polymer systems, and surface analysis with atomic force microscopy. Currently running research projects: Polymer brushes and 3D cell microenvironments, enzyme-labile block copolymer nanocapsules for the detection and treatment of bacterial wound infections, surface nanobubbles, nanostructured polymers via templating with anodic alumina, surface structuring with light-induced mass transport, and investigation of ligand-quadruplex DNA-interactions on structured surfaces. |
| Location | |
| Category | Conferences - Seminars |
Nanoscale structuring and patterning of polymeric materials to enhance functionality in “soft" interfacial architectures
In this contribution I will highlight our recent efforts to impart functionality in “soft”, i.e. organic or polymeric interfacial architectures by means of controlling chemical patterns, topographic structures, shape and finally properties on micrometer to nanometer length scales.
The presentation will introduce in the first part the underlying concepts of nanopatterning and nanostructuring of polymers by placing established techniques and approaches as well as recently developed state of the art into proper context. Serial and parallel patterning techniques will receive attention and the advantages and limitations of selected examples of direct patterning methodologies, such as nanoimprint lithography, combined top-down - bottom-up approaches,1 and monolayer-based approaches like nanocontact printing2 that are subsequently amplified by growing polymer brushes will be discussed.3
In the second part our research into functional interfaces and the control of structure and properties on nanometer length scales will be addressed, in particular, template replication approaches for the fabrication of nanostructures, which exceed the size range of molecules and self-assembly approaches, by faithful 1 : 1 replication. In this context we have developed new approaches to shape pores formed during anodization of Al by temperature modulation.4 The resulting pores, which possess modulated diameters along their length, have been successfully replicated using e.g. layer-by-layer deposition of polyelectrolytes, resulting in novel, functional nanostructures, yielding the first example of complex structures by LBL that possess both concave and convex curvature.5,6 In addition, polymer surface modification by means of reactive microcontact printing7 and scanning probe lithographic methods8 will be shown to provide access to highly controlled functional interfaces, e.g. to be applied in bacteria responsive coatings.9
References
[1] T. M. Blättler, A. Binkert, M. Zimmermann, M. Textor, J. Vörös, E. Reimhult Nanotechnology 2008, 19, 075301.
[2] B. R. Takulapalli, M. E. Morrison, J. Gu, P. Zhang Nanotechnology 2011, 22, 285302.
[3] R. Ducker, A. Garcia, J. Zhang, T. Chen, S. Zauscher Soft Matter, 2008, 4, 1774–1786.
[4] M. Raoufi, H. Schönherr RSC Advances 2013, 3, 13429.
[5] M. Raoufi, D. Tranchida, H. Schönherr Langmuir 2012, 28, 10091.
[6] M. Raoufi, H. Schönherr Langmuir 2014, in press.
[7] C. L. Feng, A. Embrechts, I. Bredebusch, J. Schnekenburger, W. Domschke, G. J. Vancso, H. Schönher, Advanced Materials 2007, 19, 286–290.
[8] Joost Duvigneau, Holger Schönherr, G. Julius Vancso ACS Applied Materials and Interfaces 2011, 3, 3855-65.
[9] Qi & K.-S. Tücking, S. Handschuh-Wang, H. Schönherr Australian Journal of Chemistry 2014, in press.
In this contribution I will highlight our recent efforts to impart functionality in “soft”, i.e. organic or polymeric interfacial architectures by means of controlling chemical patterns, topographic structures, shape and finally properties on micrometer to nanometer length scales.
The presentation will introduce in the first part the underlying concepts of nanopatterning and nanostructuring of polymers by placing established techniques and approaches as well as recently developed state of the art into proper context. Serial and parallel patterning techniques will receive attention and the advantages and limitations of selected examples of direct patterning methodologies, such as nanoimprint lithography, combined top-down - bottom-up approaches,1 and monolayer-based approaches like nanocontact printing2 that are subsequently amplified by growing polymer brushes will be discussed.3
In the second part our research into functional interfaces and the control of structure and properties on nanometer length scales will be addressed, in particular, template replication approaches for the fabrication of nanostructures, which exceed the size range of molecules and self-assembly approaches, by faithful 1 : 1 replication. In this context we have developed new approaches to shape pores formed during anodization of Al by temperature modulation.4 The resulting pores, which possess modulated diameters along their length, have been successfully replicated using e.g. layer-by-layer deposition of polyelectrolytes, resulting in novel, functional nanostructures, yielding the first example of complex structures by LBL that possess both concave and convex curvature.5,6 In addition, polymer surface modification by means of reactive microcontact printing7 and scanning probe lithographic methods8 will be shown to provide access to highly controlled functional interfaces, e.g. to be applied in bacteria responsive coatings.9
References
[1] T. M. Blättler, A. Binkert, M. Zimmermann, M. Textor, J. Vörös, E. Reimhult Nanotechnology 2008, 19, 075301.
[2] B. R. Takulapalli, M. E. Morrison, J. Gu, P. Zhang Nanotechnology 2011, 22, 285302.
[3] R. Ducker, A. Garcia, J. Zhang, T. Chen, S. Zauscher Soft Matter, 2008, 4, 1774–1786.
[4] M. Raoufi, H. Schönherr RSC Advances 2013, 3, 13429.
[5] M. Raoufi, D. Tranchida, H. Schönherr Langmuir 2012, 28, 10091.
[6] M. Raoufi, H. Schönherr Langmuir 2014, in press.
[7] C. L. Feng, A. Embrechts, I. Bredebusch, J. Schnekenburger, W. Domschke, G. J. Vancso, H. Schönher, Advanced Materials 2007, 19, 286–290.
[8] Joost Duvigneau, Holger Schönherr, G. Julius Vancso ACS Applied Materials and Interfaces 2011, 3, 3855-65.
[9] Qi & K.-S. Tücking, S. Handschuh-Wang, H. Schönherr Australian Journal of Chemistry 2014, in press.
Links
Practical information
- General public
- Free
Organizer
- IMX Seminar Series