Derjaguin-Müller-Toporov (DMT) model

The Derjaguin-Müller-Toporov (DMT) model describes how tiny solid surfaces, like in atomic-force microscopes, attract or repel each other at very close distances. It considers both the elastic deformation (how materials bend or compress) and the attractive forces (like van der Waals forces) acting when two surfaces are near but not touching. The model helps predict the forces involved during contact, especially in cases where the surfaces are smooth and adhesive forces are significant. This understanding aids in studying surface properties at the nanoscale, useful in material science and device development.