Basel Universität

Alexis Baratoff

Titular Professor
APS Fellow
office 3.01a
tel +41 (0)61 207 3725 (office)


Research interests

Within our group, Prof. A. Baratoff's interests center on the interpretation of dynamic and quasi-static atomic force measurements in ultrahigh vacuum. Mechanisms leading to atomic-scale variations of energy dissipation and of electrostatic interactions under near-contact conditions are investigated in depth. More sensitive bimodal or higher frequency excitation techniques, and more rapid detection schemes have been demonstrated and analyzed. Fundamental phenomena in both areas are investigated using phenomenological and atomistic models. Similar approaches have been applied to understand to the load dependence and anisotropy of friction, as well as its modification by AC actuation in atomic-size contacts Most of this work is done in collaboration with PhD students, postdocs and former colleagues, particular attention being given to experimentalists interested in performing model computations and to theorists eager to interpret in-house measurements. In particular, simulations performed with codes developed in the Computational Physics group of Prof. Stefan Goedecker have revealed the importance of taking account configurational changes of the probe tip and also identified the fundamental quantities affecting for atomic-scale Kelvin probe and other kinds of electrostatic force measurements.


Latest Papers (show all)

Conformations and cryo-force spectroscopy of spray-deposited single-strand DNA on gold
R. Pawlak, J.G. Vilhena, A. Hinaut, T. Meier, Thilo Glatzel, A. Baratoff, E. Gnecco, R. Pérez, E. Meyer
Nat. Comm., (10), (2019), 685, pdf.
Design and Characterization of an Electrically Powered Single Molecule on Gold
R. Pawlak , T. Meier, N. Renaud, M. Kisiel, A. Hinaut, T. Glatzel, D. Sordes, C. Durand, W.-H. Soe, A. Baratoff, C. Joachim, C. E. Housecroft, E. C. Constable , Ernst Meyer
ACS Nano, (11), (2017), 9930-9940, pdf.
Donor-Acceptor Properties of a Single-Molecule Altered by On-Surface Complex Formation
T. Meier, R. Pawlak, S. Kawai, Y. Geng, X. Liu, S. Decurtins, P. Hapala, A. Baratoff, S.-X. Liu, P. Jelinek, E. Meyer and Th. Glatzel
ACS Nano, 11, (2017), 8413–8420, pdf.
Single-molecule manipulation experiments to explore friction and adhesion
R. Pawlak, S. Kawai, T. Meier, Th. Glatzel, A. Baratoff, E. Meyer
J. Phys. D : App. Phys., (50), (2017), 113003 , pdf.

Latest Talks (show all)

Single-Molecule Experiments to Explore Friction And Adhesion (Invited)
R. Pawlak , S. Kawai, A. Baratoff, W.G. Ouyang, T. Meier, E. Gnecco, T. Glatzel, A. Filippov, A. Baratoff, M. Urbakh, E. Meyer
AVS conference, 2015-10-22, San José, (US).
Manipulation of single molecules by NC-AFM
E. Meyer , S. Kawai, A. Baratoff, E. Gnecco, R. Pawlak, T. Meier, S. Freund, A. Hinaut, R. Jöhr, M. Kisiel, U. Gysin and Th. Glatzel
8th International Workshop on Nanoscale Pattern Formation at Surfaces, 2015-07-15, Krakow, (Poland), Abstract (PDF).
Controlled switching of a single CuPc molecule on Cu(111) at low temperature
Th. Glatzel S. Fremy, A. Sadeghi, R. Pawlak, A. Baratoff, S. Goedecker, E. Meyer, and
The International Conference on Understanding and Controlling Nano and Mesoscale Friction, 2015-06-26, Istanbul, (Turkey), Abstract (PDF).
Atomic-scale friction sensed by a single molecule
R. Pawlak , W. Ouyang, A.E. Filippov, L. Kalikhman, S. Kawai, T. Glatzel, E. Gnecco, A. Baratoff, Q. Zheng, O. Hod, M. Urbakh, E. Meyer
COSTNanotribo, 2015-06-22, Istanbul, (Turkey).