force spectroscopy
Kelvin force spectroscopy
KFS
https://orcid.org/0000-0001-5985-7429
2009-09-24T04:34:08Z
Spectroscopy where an atomic force microscope is used to measure the force experienced by a sample. A probe, which is made of a material with a known work function (commonly tungsten or platinum), is arranged close to the sample surface as a parallel-plate capacitor with a small spacing. The probe is vibrated, causing a change in the capacitance between the electrodes. A voltage is then applied between the probe and sample until the electric field between them vanishes. The force gradient is proportional to the change in amplitude of the vibration. The distance between the probe and sample is kept constant during the measurement using a feedback loop.
CHMO:0002459