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SUMMARY:The Multiscale Balance of Order and Disorder as the Key to Tailor 
 Various Properties of Soft Materials
DTSTART:20161205T131500
DTEND:20161205T141500
DTSTAMP:20260922T014120Z
UID:c7b978a2fd1499a319b9e323499c726ca7ee93a65860b75e9aba1b30
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Holger Frauenrath\, EPFL - Laboratory of Macromolecular 
 and Organic Materials\nIn structural biomaterials\, nature does not only a
 ccept the inevitable presence of disorder but actually plays with it\; it 
 controls the placement of disorder on some length scales\, uses it to crea
 te structures on others\, and creates structural gradients between ordered
  and disordered domains to guide external fields. The result is the creati
 on of carefully optimized materials from self-sorting mixtures of imperfec
 t parts. With this perspective\, we investigate hierarchically structured 
 soft materials comprising 2D or 1D nanostructures. In our materials\, we c
 ombine disordered polymer segments with well-defined molecular segments ca
 pable of hydrogen bonding as a directional supramolecular interaction to e
 stablish a high degree of short range order. We have successfully implemen
 ted these concepts to control different properties across various classes 
 of materials. For instance\, we obtained organic nanowires that show an un
 precedented photogeneration of charge carriers with unusually long life ti
 mes and at concentrations close to the insulator-metal boundary.1 Moreover
 \, we have prepared hierarchically structured supramolecular elastomers th
 at can be tuned to either be reinforced rubbers or supramolecular interpen
 etrating networks that result in high performance damping materials.2 Fina
 lly\, we used the nanoscale engineering of the order-disorder interface to
  create semiaromatic polyamides with high strength and stiffness but a sig
 nificantly increased ductility. Therefore\, it seems that better understan
 ding the intricate interplay of order and disorder on different length sca
 les will be relevant to design novel soft materials with unusual property 
 profiles.\n\n \n\nReferences\n\n(1)       Marty\, R.\; Szilluweit\,
  R.\; Sánchez-Ferrer\, A.\; Bolisetty\, S.\; Adamcik\, J.\; Mezzenga\, R.
 \; Spitzner\, E.-C.\; Feifer\, M.\; Steinmann\, S. N.\; Corminboeuf\, C.\;
  Frauenrath\, H. ACS Nano 2013\, 7\, 8498.\n\n(2)       Croisier\, E
 .\; Su\, L.\; Schweizer\, T.\; Cugnoni\, J.\; Mionic\, M.\; Snellings\, R.
 \; Balog\, S.\; Michaud\, V.\; Frauenrath\, H. Nature Communications 2014\
 , 5\, 5728.\n\nBio:\n\nHolger Frauenrath (born in Aachen\, Germany) studie
 d chemistry at RWTH Aachen\, Germany from 1992 to 1997\, with a focus on s
 ynthetic organic chemistry. He performed his PhD thesis from 1998 to 2001 
 in the research group of Prof Hartwig Höcker at RWTH Aachen\, working on 
 a project related to the stereospecific polymerization of methacrylates as
  well as their copolymerization with olefins using zirconocene catalysts.\
 n\nHolger Frauenrath then joined the group of Prof. Sam Stupp at Northwest
 ern University\, Evanston\, IL\, USA\, as a postdoctoral fellow supported 
 by a Feodor Lynen fellowship of the Alexander von Humboldt Foundation. His
  postdoctoral research projects were centered around the supramolecular se
 lf-assembly of rod-coil molecules.\n\nHolger Frauenrath returned to German
 y in 2003 and started to build his own research group at FU Berlin\, funde
 d with an Emmy Noether Grant from the German Science Foundation. In 2005\,
  the research group moved to the Department of Materials at ETH Zurich\, S
 witzerland\, where it became a scientifcally independent part of the Polym
 er Chemistry Group led by Prof. A. Dieter Schlüter. Holger Frauenrath obt
 ained his Habilitation from ETH Zurich in 2009.\n\nIn 2009\, Holger Frauen
 rath has been appointed as a professor at the Institute of Materials (IMX)
  of the Ecole Polytechnique Federale de Lausanne (EPFL)\, Switzerland\, bu
 ilding the new Laboratory of Macromolecular and Organic Materials (LMOM). 
 In the same year\, Holger Frauenrath was received the prestigious European
  Research Council (ERC) Starting Investigator grant.
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STATUS:CONFIRMED
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