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  • Since 01.2011:    Head of nanotech@surfaces Laboratory
    Swiss Federal Laboratories for Materials Science and Technology (Empa)
  • Since 2008:    Tit. Prof. at the University of Bern
    Department of Chemistry and Biochemistry
  • 01.2003 – 12.2010:    Senior scientist, group leader “Molecular nanostructures”
    nanotech@surfaces Laboratory, Swiss Federal Lab. for Materials Science & Technology (Empa)
  • 01.2001 – 12.2002:    Research staff member
    Surface Technologies, Swiss Federal Lab. for Materials Science & Technology (Empa)
  • 05.2000 – 12.2000:    Visiting scientist
    Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Physical Chemistry, Berlin
  • 11.1998 – 04.2000:    Research Associate
    Swiss Federal Lab. for Materials Science & Technology (Empa)
  • 07.1998 – 10.1998:    Research Associate
    University of Fribourg, Institute of Physics, Solid State Physics group
  • 04.1997 – 06.1998:    Postdoctoral Fellow
    School of Physics, La Trobe University, Australia
  • 02.1996 – 03.1997:    Postdoctoral Research Associate
    University of Fribourg, Institute of Physics, Solid State Physics group
  • 01.1996:    Ph.D.
    Solid State Physics group (Prof. L. Schlapbach), Institute of Physics, University of Fribourg, Switzerland
  • 10.1991:    Physics Diploma
    Solid State Physics group, University of Fribourg, Switzerland
  • 1986 – 1991:    Undergraduate and graduate studies in Physics
    University of Fribourg, Switzerland

Our research covers a wide range of topics at the interface of materials science, surface physics and chemistry, with a particular focus on low-dimensional organic & carbon-based materials. We aim at developing a fundamental understanding of the structural and electronic properties of these materials and systems, and at establishing a rational basis for their application in next generation technologies. We follow different experimental approaches, but with a core activity on surface physical and chemical investigations, in particular by means of ultrahigh vacuum scanning tunneling microscopy/spectroscopy (STM/STS) and photoelectron-based methods such as XPS, UPS and XPD, which are complemented by theory and atomistic simulations.

In the topical area Carbon-Based Nanomaterials, we currently focus on sp2 derived organic nanostructures. These structures encompass molecular nanographenes (0D), carbon nanotubes and nanoribbons (1D) and porous graphene (2D). We put particular emphasis on engineering the electronic properties of these materials, which we achieve either by bottom-up synthesis of structurally precise atomic configurations, or by local modifications using structural defects or chemical functionalization. In this strongly interdisciplinary field of research, we closely collaborate with synthetic chemists and specialists in theory and modeling.

For full list of publications please see http://www.researcherid.com/rid/B-5396-2011

 

 

Publications recorded in BORIS (Bern Open Repository and Information System): 

Journal Article

Wang, Xiao-Ye; Dienel, Thomas; Di Giovannantonio, Marco; Barin, Gabriela Borin; Kharche, Neerav; Deniz, Okan; Urgel, José I.; Widmer, Roland; Stolz, Samuel; De Lima, Luis Henrique; Muntwiler, Matthias; Tommasini, Matteo; Meunier, Vincent; Ruffieux, Pascal; Feng, Xinliang; Fasel, Roman; Müllen, Klaus; Narita, Akimitsu (2017). Heteroatom-Doped Perihexacene from a Double Helicene Precursor: On-Surface Synthesis and Properties. Journal of the American Chemical Society, 139(13), pp. 4671-4674. American Chemical Society 10.1021/jacs.7b02258

Deniz, Okan; Sánchez-Sánchez, Carlos; Dumslaff, Tim; Feng, Xinliang; Narita, Akimitsu; Müllen, Klaus; Kharche, Neerav; Meunier, Vincent; Fasel, Roman; Ruffieux, Pascal (2017). Revealing the Electronic Structure of Silicon Intercalated Armchair Graphene Nanoribbons by Scanning Tunneling Spectroscopy. Nano letters, 17(4), pp. 2197-2203. American Chemical Society 10.1021/acs.nanolett.6b04727

Chen, Zongping; Wang, Hai I.; Teyssandier, Joan; Mali, Kunal S.; Dumslaff, Tim; Ivanov, Ivan; Zhang, Wen; Ruffieux, Pascal; Fasel, Roman; Räder, Hans Joachim; Turchinovich, Dmitry; De Feyter, Steven; Feng, Xinliang; Kläui, Mathias; Narita, Akimitsu; Bonn, Mischa; Müllen, Klaus (2017). Chemical Vapor Deposition Synthesis and Terahertz Photoconductivity of Low-Band-Gap N = 9 Armchair Graphene Nanoribbons. Journal of the American Chemical Society, 139(10), pp. 3635-3638. American Chemical Society 10.1021/jacs.7b00776

Fairbrother, Andrew; Sanchez-Valencia, Juan-Ramon; Lauber, Beat; Shorubalko, Ivan; Ruffieux, Pascal; Hintermann, Tobias; Fasel, Roman (2017). High vacuum synthesis and ambient stability of bottom-up graphene nanoribbons. Nanoscale, 9(8), pp. 2785-2792. Royal Society of Chemistry 10.1039/C6NR08975E

Talirz, Leopold; Söde, Hajo; Dumslaff, Tim; Wang, Shiyong; Sanchez-Valencia, Juan Ramon; Liu, Jia; Shinde, Prashant; Pignedoli, Carlo A.; Liang, Liangbo; Meunier, Vincent; Plumb, Nicholas C.; Shi, Ming; Feng, Xinliang; Narita, Akimitsu; Müllen, Klaus; Fasel, Roman; Ruffieux, Pascal (2017). On-Surface Synthesis and Characterization of 9-Atom Wide Armchair Graphene Nanoribbons. ACS nano, 11(2), pp. 1380-1388. American Chemical Society 10.1021/acsnano.6b06405

Sun, Qiang; Cai, Liangliang; Wang, Shiyong; Widmer, Roland; Ju, Huanxin; Zhu, Junfa; Li, Lei; He, Yunbin; Ruffieux, Pascal; Fasel, Roman; Xu, Wei (2016). Bottom-Up Synthesis of Metalated Carbyne. Journal of the American Chemical Society, 138(4), pp. 1106-1109. American Chemical Society 10.1021/jacs.5b10725

Xiao, Wende; Ernst, Karl-Heinz; Palotas, Krisztian; Zhang, Yuyang; Bruyer, Emilie; Peng, Lingqing; Greber, Thomas; Hofer, Werner A.; Scott, Lawrence T.; Fasel, Roman (2016). Microscopic origin of chiral shape induction in achiral crystals. Nature chemistry, 8(4), pp. 326-330. Nature Publishing Group 10.1038/nchem.2449

Kawai, S.; Benassi, A.; Gnecco, E.; Sode, H.; Pawlak, R.; Feng, X.; Mullen, K.; Passerone, D.; Pignedoli, C. A.; Ruffieux, P.; Fasel, Roman; Meyer, E. (2016). Superlubricity of graphene nanoribbons on gold surfaces. Science, 351(6276), pp. 957-961. American Association for the Advancement of Science 10.1126/science.aad3569

Ruffieux, Pascal; Wang, Shiyong; Yang, Bo; Sánchez-Sánchez, Carlos; Liu, Jia; Dienel, Thomas; Talirz, Leopold; Shinde, Prashant; Pignedoli, Carlo A.; Passerone, Daniele; Dumslaff, Tim; Feng, Xinliang; Müllen, Klaus; Fasel, Roman (2016). On-surface synthesis of graphene nanoribbons with zigzag edge topology. Nature, 531(7595), pp. 489-492. Macmillan Journals Ltd. 10.1038/nature17151

Talirz, Leopold; Ruffieux, Pascal; Fasel, Roman (2016). On-Surface Synthesis of Atomically Precise Graphene Nanoribbons. Advanced materials, 28(29), pp. 6222-6231. Wiley-VCH 10.1002/adma.201505738

Wang, Shiyong; Talirz, Leopold; Pignedoli, Carlo A.; Feng, Xinliang; Müllen, Klaus; Fasel, Roman; Ruffieux, Pascal (2016). Giant edge state splitting at atomically precise graphene zigzag edges. Nature communications, 7, p. 11507. Nature Publishing Group 10.1038/ncomms11507

Liu, Jia; Dienel, Thomas; Liu, Junzhi; Groening, Oliver; Cai, Jinming; Feng, Xinliang; Müllen, Klaus; Ruffieux, Pascal; Fasel, Roman (2016). Building Pentagons into Graphenic Structures by On-Surface Polymerization and Aromatic Cyclodehydrogenation of Phenyl-Substituted Polycyclic Aromatic Hydrocarbons. Journal of physical chemistry. C, 120(31), pp. 17588-17593. American Chemical Society 10.1021/acs.jpcc.6b05495

Sánchez-Sánchez, Carlos; Dienel, Thomas; Deniz, Okan; Ruffieux, Pascal; Berger, Reinhard; Feng, Xinliang; Müllen, Klaus; Fasel, Roman (2016). Purely Armchair or Partially Chiral: Noncontact Atomic Force Microscopy Characterization of Dibromo-Bianthryl-Based Graphene Nanoribbons Grown on Cu(111). ACS nano, 10(8), pp. 8006-8011. American Chemical Society 10.1021/acsnano.6b04025

Söde, Hajo; Talirz, Leopold; Gröning, Oliver; Pignedoli, Carlo Antonio; Berger, Reinhard; Feng, Xinliang; Müllen, Klaus; Fasel, Roman; Ruffieux, Pascal (2015). Electronic band dispersion of graphene nanoribbons via Fourier-transformed scanning tunneling spectroscopy. Physical review. B - condensed matter and materials physics, 91(4) American Physical Society 10.1103/PhysRevB.91.045429

Xiao, W. D.; Zhang, Y. Y.; Tao, L.; Aït-Mansour, K.; Chernichenko, K. Y.; Nenajdenko, V. G.; Ruffieux, P.; Du, S. X.; Gao, H.-J.; Fasel, Roman (2015). Impact of heterocirculene molecular symmetry upon two-dimensional crystallization. Scientific Reports, 4(1) Nature Publishing Group 10.1038/srep05415

Liu, Junzhi; Li, Bo-Wei; Tan, Yuan-Zhi; Giannakopoulos, Angelos; Sanchez-Sanchez, Carlos; Beljonne, David; Ruffieux, Pascal; Fasel, Roman; Feng, Xinliang; Müllen, Klaus (2015). Toward Cove-Edged Low Band Gap Graphene Nanoribbons. Journal of the American Chemical Society, 137(18), pp. 6097-6103. American Chemical Society 10.1021/jacs.5b03017

Dienel, Thomas; Kawai, Shigeki; Söde, Hajo; Feng, Xinliang; Müllen, Klaus; Ruffieux, Pascal; Fasel, Roman; Gröning, Oliver (2015). Resolving Atomic Connectivity in Graphene Nanostructure Junctions. Nano letters, 15(8), pp. 5185-5190. American Chemical Society 10.1021/acs.nanolett.5b01403

Sánchez-Sánchez, Carlos; Brüller, Sebastian; Sachdev, Hermann; Müllen, Klaus; Krieg, Matthias; Bettinger, Holger F.; Nicolaï, Adrien; Meunier, Vincent; Talirz, Leopold; Fasel, Roman; Ruffieux, Pascal (2015). On-Surface Synthesis of BN-Substituted Heteroaromatic Networks. ACS nano, 9(9), pp. 9228-9235. American Chemical Society 10.1021/acsnano.5b03895

Denk, Richard; Hohage, Michael; Zeppenfeld, Peter; Cai, Jinming; Pignedoli, Carlo A.; Söde, Hajo; Fasel, Roman; Feng, Xinliang; Müllen, Klaus; Wang, Shudong; Prezzi, Deborah; Ferretti, Andrea; Ruini, Alice; Molinari, Elisa; Ruffieux, Pascal (2014). Exciton-dominated optical response of ultra-narrow graphene nanoribbons (In Press). Nature communications, 5(4253) Nature Publishing Group 10.1038/ncomms5253

Sanchez-Valencia, Juan Ramon; Dienel, Thomas; Gröning, Oliver; Shorubalko, Ivan; Mueller, Andreas; Jansen, Martin; Amsharov, Konstantin; Ruffieux, Pascal; Fasel, Roman (2014). Controlled synthesis of single-chirality carbon nanotubes. Nature, 512(7512), pp. 61-64. Macmillan Journals Ltd. 10.1038/nature13607

Cai, Jinming; Pignedoli, Carlo A.; Talirz, Leopold; Ruffieux, Pascal; Söde, Hajo; Liang, Liangbo; Meunier, Vincent; Berger, Reinhard; Li, Rongjin; Feng, Xinliang; Müllen, Klaus; Fasel, Roman (2014). Graphene nanoribbon heterojunctions. Nature Nanotechnology, 9(11), pp. 896-900. Nature Publishing Group 10.1038/nnano.2014.184

Liu, Jia; Ruffieux, Pascal; Feng, Xinliang; Müllen, Klaus; Fasel, Roman (2014). Cyclotrimerization of arylalkynes on Au(111). Chemical communications, 50(76), p. 11200. Royal Society of Chemistry 10.1039/c4cc02859g

Jaafar, Rached; Pignedoli, Carlo A.; Bussi, Giovanni; Aït-Mansour, Kamel; Groening, Oliver; Amaya, Toru; Hirao, Toshikazu; Fasel, Roman; Ruffieux, Pascal (2014). Bowl Inversion of Surface-Adsorbed Sumanene. Journal of the American Chemical Society, 136(39), pp. 13666-13671. American Chemical Society 10.1021/ja504126z

Blankenburg, Stephan; Cai, Jinming; Ruffieux, Pascal; Jaafar, Rached; Passerone, Daniele; Feng, Xinliang; Müllen, Klaus; Fasel, Roman; Pignedoli, Carlo A. (2012). Intraribbon Heterojunction Formation in Ultranarrow Graphene Nanoribbons. ACS nano, 6(3), pp. 2020-2025. Washington, D.C.: American Chemical Society 10.1021/nn203129a

Ruffieux, Pascal; Cai, Jinming; C.Plumb, Nicholas; Patthey, Luc; Prezzi, Deborah; Ferretti, Andrea; Molinari, Elisa; Feng, Xinliang; Müllen, Klaus; Pignedoli, Carlo A.; Fasel, Roman (2012). Electronic Structure of Atomically Precise Graphene Nanoribbons. ACS nano, 6(8), pp. 6930-6935. Washington, D.C.: American Chemical Society 10.1021/nn3021376

Bendounan, A.; Ait-Mansour, K.; Braun, J.; Minar, J.; Bornemann, S.; Fasel, R.; Groning, O.; Sirotti, F.; Ebert, H. (2011). Evolution of the Rashba spin-orbit-split Shockley state on Ag/Pt(111). Physical review. B - condensed matter and materials physics, 83(19), p. 195427. Ridge, N.Y.: American Physical Society 10.1103/PhysRevB.83.195427

Bieri, M.; Blankenburg, S.; Kivala, M.; Pignedoli, C.A.; Ruffieux, P.; Mullen, K.; Fasel, R. (2011). Surface-supported 2D heterotriangulene polymers. Chemical communications, 47(37), pp. 10239-10241. Cambridge: Royal Society of Chemistry 10.1039/c1cc12490k

Canas-Ventura, M.E.; Ait-Mansour, K.; Ruffieux, P.; Rieger, R.; Mullen, K.; Brune, H.; Fasel, R. (2011). Complex Interplay and Hierarchy of Interactions in Two-Dimensional Supramolecular Assemblies. ACS nano, 5(1), pp. 457-469. Washington, D.C.: American Chemical Society 10.1021/nn102164g

Gaspari, R.; Blankenburg, S.; Pignedoli, C.A.; Ruffieux, P.; Treier, M.; Fasel, R.; Passerone, D. (2011). s-orbital continuum model accounting for the tip shape in simulated scanning tunneling microscope images. Physical review. B - condensed matter and materials physics, 84(12), p. 125417. Ridge, N.Y.: American Physical Society 10.1103/PhysRevB.84.125417

Treier, M.; Pignedoli, C.A.; Laino, T.; Rieger, R.; Mullen, K.; Passerone, D.; Fasel, R. (2011). Surface-assisted cyclodehydrogenation provides a synthetic route towards easily processable and chemically tailored nanographenes. Nature chemistry, 3(1), pp. 61-67. London: Nature Publishing Group 10.1038/nchem.891

Trelka, M.; Medina, A.; Ecija, D.; Urban, C.; Groning, O.; Fasel, R.; Gallego, J.M.; Claessens, C.G.; Otero, R.; Torres, T.; Miranda, R. (2011). Subphthalocyanine-based nanocrystals. Chemical communications, 47(36), pp. 9986-9988. Cambridge: Royal Society of Chemistry 10.1039/c1cc11658d

Bieri, Marco; Nguyen, Manh-Thuong; Gröning, Oliver; Cai, Jinming; Treier, Matthias; Aït-Mansour, Kamel; Ruffieux, Pascal; Pignedoli, Carlo A.; Passerone, Daniele; Kastler, Marcel; Müllen, Klaus; Fasel, Roman (2010). Two-Dimensional Polymer Formation on Surfaces: Insight into the Roles of Precursor Mobility and Reactivity. Journal of the American Chemical Society, 132(46), pp. 16669-16676. Washington, D.C.: American Chemical Society 10.1021/ja107947z

Cai, J.; Ruffieux, P.; Jaafar, R.; Bieri, M.; Braun, T.; Blankenburg, S.; Muoth, M.; Seitsonen, A.P.; Saleh, M.; Feng, X.; Müllen, K.; Fasel, Roman (2010). Atomically precise bottom-up fabrication of graphene nanoribbons. Nature, 466(7305), pp. 470-473. London: Macmillan Journals Ltd. 10.1038/nature09211

Bieri, Marco; Treier, Matthias; Cai, Jinming; Aït-Mansour, Kamel; Ruffieux, Pascal; Gröning, Oliver; Gröning, Pierangelo; Kastler, Marcel; Rieger, Ralph; Feng, Xinliang; Müllen, Klaus; Fasel, Roman (2009). Porous graphenes: Two-dimensional polymer synthesis with atomic precision. Chemical communications(45), p. 6919. Cambridge: Royal Society of Chemistry 10.1039/b915190g

Treier, Matthias; Fasel, Roman (2009). Surface Science Approaches to Molecular Nanostructures. CHIMIA, 63(3), pp. 122-127. Bern: Schweizerische Chemische Gesellschaft 10.2533/chimia.2009.122