Alexis Baratoff
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Titular Professor APS Fellow office 3.01a tel +41 (0)61 267 3725 (office) more... |
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Research interests
Within our group, Prof. A. Baratoff's interest centers on the interpretation of dynamic AFM measurements in UHV. More precisely, mechanisms leading to atomic-scale variations in energy dissipation and electrostatic interactions under near-contact conditions, and to the load dependence and efficient reduction of friction in atomic-size contacts, are investigated using phenomenological as well as atomistic models.
A joint project with Prof. H.-J. Hug (EMPA, Dübendorf) deals with optomechanical effects of incident light in interferometrically-sensed high-Q cantilevers and their use for efficient mode cooling and ultrasensitive dissipation measurements.
Most of this work is done in collaboration with PhD students and former colleagues, particular attention being given to experimentalists interested în performing model computations and to theorists eager to interpret in-house measurements.
Publications
| S. Fremy, S. Kawai, R. Pawlak, Th. Glatzel, A. Baratoff and E. Meyer Three-dimensional dynamic force spectroscopy measurements on KBr(001): atomic deformations at small tip-sample separations Nanotechnology, 23, (2012), 055401, pdf. |
| S. Kawai, S. Hafizovic, Th. Glatzel, A. Baratoff, and E. Meyer Rapid reconstruction of a strong nonlinear property by a multiple lock-in technique Phys. Rev. B, 85, (16), (2012), 165426, pdf. |
| S. Kawai, Th. Glatzel, S. Koch, A. Baratoff, and E. Meyer Interaction-induced atomic displacements revealed by drift-corrected dynamic force spectroscopy Phys. Rev. B, 83, (3), (2011), 035421, pdf. |
| S. Kawai, Th. Glatzel, S. Koch, B. Such, A. Baratoff, and E. Meyer Ultrasensitive detection of lateral atomic-scale interactions on graphite (0001) via bimodal dynamic force measurements Phys. Rev. B, 81, (8), (2010), 085420, pdf. |
| R. Roth, Th. Glatzel, P. Steiner, E. Gnecco, A. Baratoff, E. Meyer Multiple Slips in Atomic-Scale Friction: An Indicator for the Lateral Contact Damping Tribology Letters, 39, (1), (2010), 63, pdf. |
| P. Steiner, R. Roth, E. Gnecco, A. Baratoff, E. Meyer Angular dependence of static and kindetic friction on alkali halide surfaces Physical Review B, 82, (205417), (2010), 8, pdf. |
| E. Gnecco, A. Socoliuc, S. Maier, J. Gessler, Th. Glatzel, A. Baratoff and E. Meyer Dynamic superlubricity on insulating and conductive surfaces in ultra-high vacuum and ambient environment Nanotechnology, 20, (2009), 025501, pdf. |
| P. Steiner, R. Roth, E. Gnecco, A. Baratoff, S. Maier, Th. Glatzel, and E. Meyer Two-dimensional simulation of superlubricity on NaCl and highly oriented pyrolytic graphite Phys. Rev. B, 79, (2009), 045414, pdf. |
| S. Kawai, Th. Glatzel, S. Koch, B. Such, A. Baratoff, and E. Meyer Time-averaged cantilever deflection in dynamic force spectroscopy Phy. Rev. B, 80, (8), (2009), 085422, pdf. |
| P. Steiner, R. Roth, E. Gnecco, Th. Glatzel, A. Baratoff and E. Meyer Modulation of contact resonance frequency accompanying atomic-scale stick-slip in friction microscopy Nanotechnology, 20, (495701), (2009), 6, pdf. |
| S. Kawai, Th. Glatzel, S. Koch, B. Such, A. Baratoff, and E. Meyer Systematic Achievement of Improved Atomic-Scale Contrast via Bimodal Dynamic Force Microscopy Phys. Rev. Lett., 103, (2009), 220801, pdf. |
| S. Maier, E. Gnecco, A. Baratoff, R. Bennewitz, and E. Meyer Atomic-scale friction modulated by a buried interface: Combined atomic and friction force microscopy experiments Phys. Rev. B, 78, (2008), 045432, pdf. |
| R. Hoffmann, A. Baratoff, H.J. Hug, H.R. Hidber, H. v. Löhneysen, H.-J. Güntherodt Manifestations of rare atomic hops in dynamic force microscopy on KBr(001 Nanotechnology, 18, (2007), 395503 (1-9), pdf. |
| U. Wyder, A. Baratoff, E. Meyer, L. N. Kantorovich, J. David, S. Maier, T. Filleter, R. Bennewitz Interpretation of atomic friction experiments based on atomistic simulations J. Vac. Sci. Technol. B, 25, (5), (2007), 1547-1553, pdf. |
| L. Nony, D. Schär, A. Baratoff, A. Wetzel, O. Pfeiffer, and E. Meyer A nc-AFM simulator with Phase Locked Loop-controlled frequency detection and excitation Phys. Rev. B, 74, (2006), 235439, pdf. |
| A. Socoliuc, E. Gnecco, S. Maier, O. Pfeiffer, A. Baratoff, R. Bennewitz and E.Meyer Atomic-scale control of friction by actuation of nanometer-sized contacts Science, 313, (2006), 207-210, pdf. |
| M.A. Lantz, R. Hoffmann, A.S. Foster, A. Baratoff, H.J. Hug, H.R. Hidber, H.-J. Güntherodt Site-specific force-distance characteristics on NaCl(001): Measurements versus atomistic simulations Phys. Rev. B, 74, (2006), 245426 (1-9), pdf. |
| E. Gnecco, A. Socoliuc, E. Meyer, A. Baratoff, R. Bennewitz, M. Dienwiebel, and J. Frenken Slippery Nanoworld Europhysics News, 36, (2005), 6. |
| O. Pfeiffer, L. Nony, R. Bennewitz, A. Baratoff, and E. Meyer Distance dependence of Force and Dissipation in nc-AFM on Cu(100) and Al(111) Nanotechnology, 15, (2004), S101. |
| L. Nony, E. Gnecco, A. Alkauskas, A. Baratoff, R. Bennewitz, O. Pfeiffer, S. Maier, A. Wetzel, E. Meyer, and C. Gerber Observation of individual molecules trapped on a nanostructured insulator Nano Letters, 44, (2004), 2185, pdf. |
| E. Gnecco, A. Socoliuc, R. Bennewitz, E. Meyer, A. Baratoff, M. Dienwiebel, and J. Frenken Slippery nano world Europhysicsnews, (2004). |
| O. Pfeiffer, R. Bennewitz, A. Baratoff, E. Meyer, P. Grütter Lateral-force measurements in dynamic force microscopy Phys. Rev. B, 65, (2002), 161403(R). |
| E. Meyer, R. Bennewitz, E. Gnecco, O. Pfeiffer, V. Barwich, A. Wetzel, A. Baratoff From contact to non-contact: Force microscopy experiments in ultrahigh vacuum Abstr Pap AM Chem Soc, (2002), 497-PHYS Part 2. |
| E. Meyer, R. Bennewitz, O. Pfeiffer, V. Barwich, M. Guggisberg, S. Schär, M. Bammerlin, C. Loppacher, U. Gysin, C.Wattinger, A. Baratoff Dissipation mechanisms studied by dynamic force microscopies Fundamentals of Tribology and Bridging the Gap Between the M, (2001), 67-81. |
| C. Loppacher, M. Bammerlin, M. Guggisberg, S. Schär, R. Bennewitz, A. Baratoff, E. Meyer, and H.-J. Güntherodt Dynamic force microscopy of copper surfaces- Atomic resolution and distance dependence of tip-sample interaction and tunneling current Phys. Rev. B, 62, (2000), 16944. |
| C. Loppacher, R. Bennewitz, O. Pfeiffer, M. Guggisberg, M. Bammerlin, S. Schär, V. Barwich, A. Baratoff and E. Meyer Experimental aspects of dissipation force microscopy Phys. Rev. B, 62, (2000), 13674. |
| M. Guggisberg, M. Bammerlin, A. Baratoff, R. Lüthi, Ch. Loppacher, F.M. Battiston, J. Lü, R. Bennewitz, E. Meyer and H.-J. Güntherodt Dynamic force microscopy across steps on the Si(111)7x7 surface Surface Science, 127, (2000), 255. |
| M. Guggisberg, M. Bammerlin, Ch. Loppacher, O. Pfeiffer, A. Abdurixit, V. Barwich, R. Bennewitz, A. Baratoff, E. Meyer and H.-J. Güntherodt Separation of interactions by non-contact force microscopy Phys. Rev. B, 61, (2000), 11151. |
| V. Barwich, M. Bammerlin, A. Baratoff, R. Bennewitz, M. Guggisberg, C. Loppacher, O. Pfeiffer, E. Meyer, H.-J. Güntherodt, J.-P. Salvetat, J.-M. Bonard, and L. Forró Carbon Nanotubes as Tips in Non-contact SFM Appl. Surf. Sci., 127, (2000), 269. |
| R. Lüthi, E. Meyer, M. Bammerlin, A. Baratoff, T. Lehmann, L. Howald, Ch. Gerber and R. Lüthi Atomic Resolution in Dynamic Force Microscopy Across Steps on Si(111)7×7. Z. Phys. B, 100, (1996), 165. |
| T. Bonner, A. Baratoff, H.-J. Güntherodt MD-Simulations of scanning force microscopy on self-assembled monolayers HELVETICA PHYSICA ACTA, 68, (2), (1995), 199-200. |