DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2001 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

CPP: Chemische Physik und Polymerphysik

CPP 19: Poster: New Methods, Thin Polymer Films, Monolayers

CPP 19.7: Poster

Thursday, April 5, 2001, 12:30–15:00, AT1

Local measurements of sliding friction and stick-slip with quartz resonators in the time domain — •Steffen Berg and Diethelm Johannsmann — Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany

On the microscopic scale sliding friction is usually accompanied by stick-slip motion, resulting in strong nonlinearities. In order to investigate these nonlinearities we monitored the motion of a freely vibrating quartz shear resonator (12 MHz) in the time domain while approaching a small sphere.

We extracted both the resonance parameters (frequency, bandwidth and amplitude) and the Fourier components of the oscillation.

When the sphere touches the quartz plate the 3rd harmonic signal displays spikes and steps which we attribute to stick-slip and a locking-in of the relative motion.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2001 > Berlin