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SUMMARY:Bottom-Up Fabrication of Graphene-related Materials
DTSTART:20141003T141500
DTSTAMP:20260427T210726Z
UID:b3dca105a475d5d5b496f5ae3f4f51f21cbdf34a898531ec4031f16b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Roman Fasel\, Empa\, Swiss Federal Laboratories for Mate
 rials Science and Technology\, nanotech@surfaces Laboratory\, 8600 Dübend
 orf\, Switzerland\nBio: Roman Fasel received his Ph.D. in Physics in 1996 
 from the University of Fribourg (Switzerland) and joined EMPA\, the Swiss 
 Federal Laboratories for Materials Science and Technology\, after post-doc
 toral research fellowships at La Trobe University (Melbourne) and the Frit
 z-Haber-Institute (Berlin). He is currently the head of the nanotech@surfa
 ces Laboratory of EMPA\, and since 2008 Tit. Professor at the Department o
 f Chemistry and Biochemistry of the University of Bern. RF has a strong ba
 ckground in experimental surface physics and chemistry\, and follows an ex
 perimental approach building on state-of-the-art scanning probe methods (U
 HV temperature-controlled STM/STS) combined with structural and spectrosco
 pic methods based on x-ray photoelectron emission (XPS\, UPS\, XPD). His g
 roup’s research covers a wide range of topics at the interface of materi
 als science\, surface physics and chemistry\, with the aim of understandin
 g molecular processes at surfaces at a molecular and atomic level. RF has 
 obtained several Research Fellowships of e.g. the Swiss National Science F
 oundation\, the Alexander-von-Humboldt-Stiftung and the Max-Planck-Gesells
 chaft. Recipient of several awards\, e.g. Thürler-Reeb Prize and ICSOS Yo
 ung Scientist Prize. Member of the Swiss National Center of Competence in 
 Research (NCCR) Nanoscale Science\, Board member of the IUVSTA Surface Sci
 ence Division Committee. He has given numerous invited talks at internatio
 nal conferences and at research institutions and universities world-wide\,
  and has published more than 100 papers in international journals.\nFrom M
 olecules to Nanoribbons and Nanotubes\nThe properties of single-walled car
 bon nanotubes (SWCNT) and graphene nanoribbons (GNR) depend sensitively on
  the details of their atomic structure. For the case of SWCNTs\, electroni
 c and optical properties are directly related to the chiral index (n\,m) t
 hat denotes the length and orientation of the circumferential vector in th
 e hexagonal carbon lattice. For GNRs\, the electronic states largely depen
 d on nanoribbon width and edge structure (armchair or zigzag). Monodispers
 e “single-chirality” SWCNTs and atomically precise GNRs are thus neede
 d to fully exploit the technological potential of these materials.\nIn a f
 irst part of this presentation\, I will review a recently developed bottom
 -up approach to the fabrication of atomically precise GNRs [1]. It is base
 d on a surface-assisted synthetic route using specifically designed precur
 sor monomers\, and has made available ultra-narrow GNRs and related graphe
 ne nanostructures for experimental investigations of their structural\, el
 ectronic and optical properties [1-5]. In a second part\, I will report on
  a closely related bottom-up strategy targeting the controlled synthesis o
 f single-chirality SWCNTs [6].\nReferences:\n[1]   J. Cai et al.\, Natur
 e 466\, 470 (2010).\n[2]   P. Ruffieux et al.\, ACS Nano\, 6\, 6930 (201
 2).\n[3]   L. Talirz et al.\, J. Am. Chem. Soc. 135\, 2060 (2013) \; H. 
 Söde et al.\, submitted.\n[4]   R. Denk et al.\, Nat. Commun. 5\, 4253 
 (2014).\n[5]   J. Cai et al.\, Nat. Nanotechnol. (2014) \; doi:10.1038/n
 nano.2014.184.\n[6]   J.R. Sanchez et al.\, Nature 512\, 61 (2014).
LOCATION:PH L1 503 (Aquarium) http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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