Towards molecularly informed traction-separation relations

摘要

The paper describes the development of an experiment with associated analysis to determine the adhesive interactions between Si (111) surfaces which were coated with amine and carboxyterminated self-assembled monolayers (SAMs).The silicon beams were pressed together to form miniature laminated beam specimens which were then separated using a specially developed high vacuum fracture tester.The deposition of the SAMs and associated spectroscopic,scanning probe and ellipsometric diagnostics are described.The delaminations between the silicon strips and the associated normal crack opening displacements (NCOD) were measured via infra-red crack opening interferometry.This,coupled with fracture analyses allowed the traction-separation relation associated with amine/carboxyl interactions to be determined.