2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219960We calculate equilibrium and nonequilibrium Casimir-Polder force felt by a small particle (an atom)near a flat substrate using the framework of fluctuation electrodynamics in configuration of a small sphere above a flat substrate. A numerical example is given for a SiC micron -sized particle above a SiC substrate. Different temperature configurations are considered.10 pages, 2 figuresOther Condensed Mattertext