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SUMMARY:Nanoscale structuring and patterning of polymeric materials
DTSTART:20140303T131500
DTSTAMP:20260407T175646Z
UID:b78b72b6bc470361eeed2af0b93ba95a6465ec489fb212905fcbe086
CATEGORIES:Conferences - Seminars
DESCRIPTION:Holger Schönherr\, University of Siegen\, Germany\nBio: Holge
 r Schönherr studied chemistry and polymer chemistry & physics at the Univ
 ersities 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 postdoct
 oral stay at Stanford University with Curtis W. Frank he joined the MESA+ 
 Institute for Nanotechnology in Twente as assistant (later associate) prof
 essor before joining the University of Siegen in 2008 as a University Prof
 essor in Physical Chemistry. In April 2013 he was also appointed as guest 
 professor at the Shanghai Jiaotong\nUniversity. He was awarded\, among oth
 ers\, with the Schloessmann award (Biology and Materials Science) of the M
 ax 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 gr
 ant (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 biointerfa
 ces\, self-assembled and nanostructured polymer systems\, and surface anal
 ysis with atomic force microscopy. Currently running research projects: Po
 lymer brushes and 3D  cell microenvironments\, enzyme-labile block copoly
 mer nanocapsules for the detection and treatment of bacterial wound infect
 ions\, surface nanobubbles\, nanostructured polymers via templating with a
 nodic alumina\, surface structuring with light-induced mass transport\, an
 d investigation of ligand-quadruplex DNA-interactions on structured surfac
 es.\nNanoscale structuring and patterning of polymeric materials to enhanc
 e functionality in “soft" interfacial architectures\nIn this contributio
 n I will highlight our recent efforts to impart functionality in “soft
 ”\, i.e. organic or polymeric interfacial architectures by means of cont
 rolling chemical patterns\, topographic structures\, shape and finally pro
 perties on micrometer to nanometer length scales.\nThe presentation will i
 ntroduce in the first part the underlying concepts of nanopatterning and n
 anostructuring of polymers by placing established techniques and approache
 s as well as recently developed state of the art into proper context. Seri
 al and parallel patterning techniques will receive attention and the advan
 tages and limitations of selected examples of direct patterning methodolog
 ies\, such as nanoimprint lithography\, combined top-down - bottom-up appr
 oaches\,1 and monolayer-based approaches like nanocontact printing2 that a
 re subsequently amplified by growing polymer brushes will be discussed.3\n
 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 n
 anostructures\, which exceed the size range of molecules and self-assembly
  approaches\, by faithful 1 : 1 replication. In this context we have devel
 oped new approaches to shape pores formed during anodization of Al by temp
 erature modulation.4 The resulting pores\, which possess modulated diamete
 rs 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 scann
 ing probe lithographic methods8 will be shown to provide access to highly 
 controlled functional interfaces\, e.g. to be applied in bacteria responsi
 ve coatings.9\nReferences\n[1] T. M. Blättler\, A. Binkert\, M. Zimmerman
 n\, M. Textor\, J. Vörös\, E. Reimhult Nanotechnology 2008\, 19\, 075301
 .\n[2] B. R. Takulapalli\, M. E. Morrison\, J. Gu\, P. Zhang Nanotechnolog
 y 2011\, 22\, 285302.\n[3] R. Ducker\, A. Garcia\, J. Zhang\, T. Chen\, S.
  Zauscher Soft Matter\, 2008\, 4\, 1774–1786.\n[4] M. Raoufi\, H. Schön
 herr RSC Advances 2013\, 3\, 13429.\n[5] M. Raoufi\, D. Tranchida\, H. Sch
 önherr Langmuir 2012\, 28\, 10091.\n[6] M. Raoufi\, H. Schönherr Langmui
 r 2014\, in press.\n[7] C. L. Feng\, A. Embrechts\, I. Bredebusch\, J. Sch
 nekenburger\, W. Domschke\, G. J. Vancso\, H. Schönher\, Advanced Materia
 ls 2007\, 19\, 286–290.\n[8] Joost Duvigneau\, Holger Schönherr\, G. Ju
 lius Vancso ACS Applied Materials and Interfaces 2011\, 3\, 3855-65.\n[9] 
 Qi & K.-S. Tücking\, S. Handschuh-Wang\, H. Schönherr Australian Journal
  of Chemistry 2014\, in press.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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