article Application and analysis of sol–gel coatings on surface-structured PA6 plastic substrates published Philipp Krieger author Jan Philipp Castrup author Frank Hamelmann author Angela Ries author Elsevier BV2026 eng Results in Materials 2590048X10.1016/j.rinma.2026.101061 32 72522026-10-28T13:18:47Z2026-10-28T13:19:30Z