Dear MEMS-Community: We have measured friction in the micronewton range as a function of external vibration. The vibration was introduced perpendicular to the direction of sliding with an amplitude ranging from 4 nm up to 2 microns. The results could be very interesting for microtechnology, however, we are struggling with the theoretical description. Is anybody aware of publications or running projects in that field? Any help is appreciated. Best Regards, Matt Scherge Dr. Matthias Scherge Microtribology Group Technische Universitaet Ilmenau PF 100565 D-98684 Ilmenau Tel +49 3677 693782 Fax +49 3677 693771 ttp://imath.mathematik.tu-ilmenau.de/phys/personal/tribo.html