STRUCTURE AND STABILITY OF 2-COMPONENT LANGMUIR-BLODGETT MULTILAYERS CONTAINING CADMIUM ARACHIDATE AND POLYGLUTAMATE DETERMINED BY REFLECTIVITY

Interlayer diffusion and interdigitation in Langmuir-Blodgett multilay ers containing asymmetric interfaces between cadmium arachidate (CdA) and an octadecyl-substituted polyglutamate (PG) were studied using neu tron reflectometry and X-ray reflectometry. It was found that the stru cture of the two-component CdA/PG multilayers is less stable to anneal ing than is the structure of multilayers containing only CdA or only P G. The PG side chains and CdA tails at adjoining layers appear to inte rdigitate significantly in unannealed multilayers, and this interdigit ation becomes more mal ked after annealing.