- Surface Science 603 (2009) 590-596.
- Applied Physics A-Materials Science & Processing 95 (2009) 257-263.
- Surface Science 603 (2009) 2861-2869.
- Surface Science 603 (2009) 469-476.
- Journal of Applied Physics 106 (2009) 053501(1)-053501(3).
- Nanotechnology 20 (2009) 264015-1-264015-10.
- Nanotechnology 20 (2009) 505703(1)-505703(7).
- Physical Review B 80 (2009) 115424(1)-115424(7).
- Physical Review Letters 103 (2009) 266103(1)-266103(4).
- Chapter 11 in Noncontact Atomic Force Microscopy, eds. S.Morita, F.J. Giessibl, R. Wiesendanger, in series NanoScience and Technology, vol. 2, Springer-Verlag Berlin Heidelberger 2009 pp. 227-248.