Presenter: Prof. HelmuthMöhwald
Max-Planck-Institute of Colloids and Interfaces, Germany
Topic: Light stimulated interactions in organic/inorganic nanocomposites
Time: 10:00 AM, Oct.31st (Monday)
Location: ConferenceRoom B, BLDG 909-1F
Abstract
Therehave been many developments to fabricate ultrathin polymeric films, but less isknown about the interaction of these films with an inorganic support. I willdiscuss 3 different systems, where the interaction is most important for thefunction of the film in response to processes on the support.
1.In cooperation with G. Zhang, Jilin University, a nanoplasmonic surface with aAg film deposited is designed that is optically transparent and that can beexcited by visible light. Field enhancement can lead to enhanced optical orRaman spectroscopic sensing, it can also be used to heat a thermoresponsivepolymer film, that then changes wetting behavior. Many different geometrieslike frustrums, nanobeakers,asymmetric volcanoes are realized and optimized for maximum sensitivity ofdetection, and results of simulations and experiments are in good agreement.Inspecial the coupling of different plasmons is most promising, leading todifferent environmental sensitivity.
2.A TiO2 support excited by UV light, sonochemically treated also by visiblelight, ejects charge carriers, that can be converted into protons in an aqueousor polyelectrolyte environment. The resulting pH change can lead to a change inthickness and elasticity of the polymeric film. This can lead to changes incell growth and via light this can be guided on a surface. Estimates ofrequired sensitivities show, that this light/pH conversion can be achieved withmany different solids and should also much depend on the type of polymer, thatcould serve as pH buffer.(E.V.Skorb, D.V.Andreeva, H.M. et al. Angew.Chemie,Biomacromol., in press.)
Biography
| | |
| Positions |
|
| 1974-1975 | Postdoc, (IBM San Jose) |
| 1978 | Habilitation in Physics (University of Ulm) |
| 1978-1981 | Scientific Co-Worker (Dornier-System, Friedrichshafen) |
| 1981-1987 | Associate Professor (C3) in Experimental Physics, Biophysics. (TU München) |
| 1987-1993 | Chair (C4) in Physical Chemistry (University of Mainz) |
| 1993-2014 | Director and Scientific Member, (MPI of Colloids and Interfaces, Golm/ Potsdam) |
| since 1995 | Honorary Professor, (University of Potsdam) |
| since 2014 | Emeritus director and consultant at the MPI of Colloids and Interfaces |
| since 2014 | Consultant with the CEA at ICSM Marcoule, France |
| Awards and Scholarships | |
| 1979 | Physics Award of the German Physical Society |
| 1998 | Raphael-Eduard-Liesegang Award of the German Colloid Society |
| 2000 | Vannegard Lecture, Gothenburg |
| 2002 | Lectureship Award of the Japanese Colloid Society |
| 2002 | Founder’s Lecture, London |
| 2002 | Eli Burstein Lecture, Philadelphia |
| 2004 | Corresponding member of the Austrian Academy of Sciences |
| 2007 | Gay-Lussac-Humboldt Award, French Ministry of Sci. Technol. |
| 2007 | Highly cited chemist according to ISI |
| 2007 | Overbeek Medal of the European Colloid and Interface Society |
| 2008 | Honorary Doctorate of the University Montpellier, France |
| 2009 | Ostwald-Medal of the German Kolloid-Gesellschaft |
| 2010 | BP visiting lecturer, Univ. Cambridge |
| 2012 | Member of the Academy of Europe |
| 2014 | Langmuir Lecturer (ACS) |
| 2014 | Elyuhar - Goldschmidt award of the Royal Spanish Chemical Society |
Publications
According to WoS (Core)(September 2016): >1000 publications, h=106, > 49.000 citations
Contact: Prof. Lifeng Chi
（责任编辑：张伶 邮箱：zhangling10@suda.edu.cn）