Electrostatic force also attracts and repels objects ... forces from things that are not touching them. These are called non-contact forces. Gravity is the reason objects fall to the ground ...

KPFM is a variant of EFM that measures the contact potential difference (CPD) between the probe and sample. A feedback loop adjusts the DC voltage applied to the probe to nullify the electrostatic ...

Exploring the mathematics -Reference 'Why chemical reactions happen' by James Keeler and Peter Wothers - section 3.2 page 21 Come up with the equation for electrostatic force.

The cantilever is driven into oscillation by electrostatic forces where the DC potential difference between the surface and the cantilever is non-zero. Using a four-quadrant ... KPFM is based on the ...